Pub Date : 2020-12-01DOI: 10.15298/invertzool.17.4.04
A. Kudryavtsev, E. Volkova, F. Voytinsky
A strain of Vexillifera Schaeffer, 1926 was isolated from the bottom sediments of the Vostok Bay of the Sea of Japan and showed close similarity to V. armata Page, 1979. The new strain shares several morphological characters of this morphospecies, in particular, cell coat structure and the presence of unique “trichocyst-like bodies” in the cytoplasm. The studied strain branches in one of the clades of marine Vexillifera species, with the unnamed Mediterranean Vexillifera strain K9 as its closest relative. Unfortunately, the type strain of V. armata was lost before any molecular data were obtained. Therefore, no information is available on this species for molecular comparison. The studied strain was isolated from the habitat geographically very distant from the type one. The type strain of V. armata was estuarine, while the new strain was isolated from the lower sublittoral benthos and appears to be stenohaline based on the results of an experimental study. It also showed some elusive morphological differences that may be regarded as intraspecific variation. Although currently known extent of cryptic speciation in the naked lobose amoebae is relatively high, the differences between the studied strain and V. armata may be too subtle to warrant a description of a separate species. Therefore, we conclude that the new strain should be identified as Vexillifera cf. armata. Re-isolation of V. armata from its type locality is highly desirable to evaluate a degree of molecular variability within this morphospecies. How to cite this article: Kudryavtsev A.A., Volkova E.N., Voytinsky F.P.. 2020. Morphological and molecular investigation of Vexillifera cf. armata Page, 1979 (Amoebozoa: Dactylopodida) isolated from the Pacific Ocean // Invert. Zool. Vol.17. No.4. P.385–402, video. doi: 10.15298/invertzool.17.4.04
{"title":"Morphological and molecular investigation of Vexillifera cf. armata Page, 1979 (Amoebozoa: Dactylopodida) isolated from the Pacific Ocean","authors":"A. Kudryavtsev, E. Volkova, F. Voytinsky","doi":"10.15298/invertzool.17.4.04","DOIUrl":"https://doi.org/10.15298/invertzool.17.4.04","url":null,"abstract":"A strain of Vexillifera Schaeffer, 1926 was isolated from the bottom sediments of the Vostok Bay of the Sea of Japan and showed close similarity to V. armata Page, 1979. The new strain shares several morphological characters of this morphospecies, in particular, cell coat structure and the presence of unique “trichocyst-like bodies” in the cytoplasm. The studied strain branches in one of the clades of marine Vexillifera species, with the unnamed Mediterranean Vexillifera strain K9 as its closest relative. Unfortunately, the type strain of V. armata was lost before any molecular data were obtained. Therefore, no information is available on this species for molecular comparison. The studied strain was isolated from the habitat geographically very distant from the type one. The type strain of V. armata was estuarine, while the new strain was isolated from the lower sublittoral benthos and appears to be stenohaline based on the results of an experimental study. It also showed some elusive morphological differences that may be regarded as intraspecific variation. Although currently known extent of cryptic speciation in the naked lobose amoebae is relatively high, the differences between the studied strain and V. armata may be too subtle to warrant a description of a separate species. Therefore, we conclude that the new strain should be identified as Vexillifera cf. armata. Re-isolation of V. armata from its type locality is highly desirable to evaluate a degree of molecular variability within this morphospecies. How to cite this article: Kudryavtsev A.A., Volkova E.N., Voytinsky F.P.. 2020. Morphological and molecular investigation of Vexillifera cf. armata Page, 1979 (Amoebozoa: Dactylopodida) isolated from the Pacific Ocean // Invert. Zool. Vol.17. No.4. P.385–402, video. doi: 10.15298/invertzool.17.4.04","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90743706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.15298/invertzool.16.3.07
Y. Sundukov, K. Makarov
An analyis of all available information on the ground beetles of the Russian Far East published in the 2nd edition of the first volume of the Catalogue of Palaearctic Coleoptera is presented. A total of 155 Far Eastern taxa of Carabidae is included, for which 178 changes are given: 108 of them concern distribution data, while 70 require taxonomic corrections. Another 8 omitted Far Eastern taxa are added to the catalogue; 31 and 19 taxa are included in or excluded from the fauna of the Far East, respectively; the distribution information is either restricted or expanded for 46 taxa. The total number of species-rank taxa in the fauna of the Far East is increased from 761 to 781. How to cite this article: Sundukov Yu.N., Makarov K.V. 2019. Ground beetles (Coleoptera: Carabidae) of the Russian Far East: Additions and corrections to the Catalogue of Palaearctic Coleoptera, Volume 1 (2017) // Invert. Zool. Vol.16. No.3. P.283–304. doi: 10.15298/invertzool.16.3.07
{"title":"Ground beetles (Coleoptera: Carabidae) of the Russian Far East: Additions and corrections to the Catalogue of Palaearctic Coleoptera, Volume 1 (2017)","authors":"Y. Sundukov, K. Makarov","doi":"10.15298/invertzool.16.3.07","DOIUrl":"https://doi.org/10.15298/invertzool.16.3.07","url":null,"abstract":"An analyis of all available information on the ground beetles of the Russian Far East published in the 2nd edition of the first volume of the Catalogue of Palaearctic Coleoptera is presented. A total of 155 Far Eastern taxa of Carabidae is included, for which 178 changes are given: 108 of them concern distribution data, while 70 require taxonomic corrections. Another 8 omitted Far Eastern taxa are added to the catalogue; 31 and 19 taxa are included in or excluded from the fauna of the Far East, respectively; the distribution information is either restricted or expanded for 46 taxa. The total number of species-rank taxa in the fauna of the Far East is increased from 761 to 781. How to cite this article: Sundukov Yu.N., Makarov K.V. 2019. Ground beetles (Coleoptera: Carabidae) of the Russian Far East: Additions and corrections to the Catalogue of Palaearctic Coleoptera, Volume 1 (2017) // Invert. Zool. Vol.16. No.3. P.283–304. doi: 10.15298/invertzool.16.3.07","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88833515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.1.01
N. Sanamyan, K. Sanamyan, N. McDaniel, E. Bocharova
Two small sea anemones, Octineon suecicum and Edwardsiella loveni, known previously only from scarce records in European waters, are reported from British Columbia, Canada. Both genera, Octineon and Edwardsiella were not previously reported from the North Pacific. It is speculated that both species have a wider distribution than it appears from scarce existing records, but due to specific habitat and being flat and firmly attached to bedrock (Octineon) or inhabiting deep narrow crevices in bedrock (Edwardsiella) they escape traditional collecting devices such as trawls or dredges. The phylogenetic and statistical analyses showed that the family Octineonidae is probably related with Hormathiidae. How to cite this article: Sanamyan N.P., Sanamyan K.E., McDaniel N., Bocharova E.S. 2018. First record of two genera of sea anemones (Cnidaria: Actiniaria), Octineon and Edwardsiella, from the North Pacific Ocean // Invert. Zool. Vol.15. No.1. P. 1–18. doi: 10.15298/invertzool.15.1.01
{"title":"First record of two genera of sea anemones (Cnidaria: Actiniaria), Octineon and Edwardsiella, from the North Pacific Ocean","authors":"N. Sanamyan, K. Sanamyan, N. McDaniel, E. Bocharova","doi":"10.15298/invertzool.15.1.01","DOIUrl":"https://doi.org/10.15298/invertzool.15.1.01","url":null,"abstract":"Two small sea anemones, Octineon suecicum and Edwardsiella loveni, known previously only from scarce records in European waters, are reported from British Columbia, Canada. Both genera, Octineon and Edwardsiella were not previously reported from the North Pacific. It is speculated that both species have a wider distribution than it appears from scarce existing records, but due to specific habitat and being flat and firmly attached to bedrock (Octineon) or inhabiting deep narrow crevices in bedrock (Edwardsiella) they escape traditional collecting devices such as trawls or dredges. The phylogenetic and statistical analyses showed that the family Octineonidae is probably related with Hormathiidae. How to cite this article: Sanamyan N.P., Sanamyan K.E., McDaniel N., Bocharova E.S. 2018. First record of two genera of sea anemones (Cnidaria: Actiniaria), Octineon and Edwardsiella, from the North Pacific Ocean // Invert. Zool. Vol.15. No.1. P. 1–18. doi: 10.15298/invertzool.15.1.01","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"64 S1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72557614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.3.02
N. N. Smirnov
{"title":"Assessment of all groups of animal remains in sediments should precede special investigation of particular groups","authors":"N. N. Smirnov","doi":"10.15298/invertzool.15.3.02","DOIUrl":"https://doi.org/10.15298/invertzool.15.3.02","url":null,"abstract":"","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"311 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79697065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.1.03
N. Sanamyan, K. Sanamyan
Ultra-abyssal Paraedwardsia hadalis sp.n. is a first species of sea anemones described from Aleutian Trench. It resembles two deep water species P. abyssorum and P. lemchei which differ from other Paraedwardsia species by weak development of tenaculi. Paraedwardsia hadalis sp.n. from 7250 m is a most deep water species of the family Edwardsiidae. How to cite this article: Sanamyan N.P., Sanamyan K.E. 2018. Paraedwardsia hadalis, a new ultra-abyssal sea anemone (Actiniaria: Edwardsiidae) from Aleutian Trench // Invertebrate Zoology. Vol.15. No.1. P.42–50. doi: 10.15298/invertzool.15.1.03
{"title":"Paraedwardsia hadalis, a new ultra-abyssal sea anemone (Actiniaria: Edwardsiidae) from Aleutian Trench","authors":"N. Sanamyan, K. Sanamyan","doi":"10.15298/invertzool.15.1.03","DOIUrl":"https://doi.org/10.15298/invertzool.15.1.03","url":null,"abstract":"Ultra-abyssal Paraedwardsia hadalis sp.n. is a first species of sea anemones described from Aleutian Trench. It resembles two deep water species P. abyssorum and P. lemchei which differ from other Paraedwardsia species by weak development of tenaculi. Paraedwardsia hadalis sp.n. from 7250 m is a most deep water species of the family Edwardsiidae. How to cite this article: Sanamyan N.P., Sanamyan K.E. 2018. Paraedwardsia hadalis, a new ultra-abyssal sea anemone (Actiniaria: Edwardsiidae) from Aleutian Trench // Invertebrate Zoology. Vol.15. No.1. P.42–50. doi: 10.15298/invertzool.15.1.03","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74671695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/INVERTZOOL.15.3.06
C. López, P. Mosquera, H. Hampel, A. N. Neretina, M. Alonso, Damme K. Van, Alexey A. Kotov
An annotated checklist of recorded species of Cladocera (Crustacea: Branchiopoda) from inland aquatic habitats in Ecuador (including the Galapagos) is provided. We revised all published records, evaluated the validity of each taxon and provided short taxonomic and biogeographical remarks for each taxon. A total of 34 valid species grouped into 23 genera was found. Presently, all attempts to analyze distributional patterns of cladocerans in Ecuador are premature due to the scarcity of adequate information. Current achievements in the inventory of cladocerans, information gaps and recommendations for future studies on cladoceran taxonomy in Ecuador are discussed.
{"title":"An annotated checklist of the freshwater cladocerans (Crustacea: Branchiopoda: Cladocera) of Ecuador and the Galápagos Islands","authors":"C. López, P. Mosquera, H. Hampel, A. N. Neretina, M. Alonso, Damme K. Van, Alexey A. Kotov","doi":"10.15298/INVERTZOOL.15.3.06","DOIUrl":"https://doi.org/10.15298/INVERTZOOL.15.3.06","url":null,"abstract":"An annotated checklist of recorded species of Cladocera (Crustacea: Branchiopoda)\u0000from inland aquatic habitats in Ecuador (including the Galapagos) is provided.\u0000We revised all published records, evaluated the validity of each taxon and provided short\u0000taxonomic and biogeographical remarks for each taxon. A total of 34 valid species grouped\u0000into 23 genera was found. Presently, all attempts to analyze distributional patterns of\u0000cladocerans in Ecuador are premature due to the scarcity of adequate information. Current\u0000achievements in the inventory of cladocerans, information gaps and recommendations for\u0000future studies on cladoceran taxonomy in Ecuador are discussed.","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89958124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.1.05
A. H. Elgetany, A. El-Ghobashy, A. Ghoneim, Torsten H. Struck
The annelid family Eunicidae comprises ten genera including the genus Marphysa Quatrefages, 1866. This genus is characterized by a global distribution and has considerable value in the bait industry worldwide. Therefore, the correct delimitation of species is important not only for consideration of its evolution, but also for culturing species from this genus. Marphysa sanguinea (Montagu, 1813) represents a complex of species and its global distribution is not clearly defined. Herein we describe a new species, Marphysa aegypti sp.n., belonging to the M. sanguinea group from the coastal waters of Egypt. This species, which has previously been reported as M. sanguinea, has a high commercial value as it is collected and vastly used by fishermen in Egypt. In our study, we used both molecular (COI barcoding region) and morphological species identification. Our results confirm that this polychaete, which is a common inhabitant of Egyptian coastal waters (i.e., Mediterranean Sea, Red Sea and the Suez Canal), is a distinct species. Our findings further support the view that the polychaete fauna of Egypt needs taxonomic revision. Determination of the polychaete species of Egypt, similarly to other regions of the world, is based on identification keys developed for Northern European species and lacks thorough morphological comparisons. Therefore, all previous records of M. sanguinea in coastal waters of Egypt should be reconsidered as being indeed M. aegypti sp.n. How to cite this article: Elgetany A.H., El-Ghobashy A.E., Ghoneim A.M., Struck T.H. 2018. Description of a new species of the genus Marphysa (Eunicidae), Marphysa aegypti sp.n., based on molecular and morphological evidence // Invert. Zool. Vol.15. No.1. P.71– 84. doi: 10.15298/invertzool.15.1.05
{"title":"Description of a new species of the genus Marphysa (Eunicidae), Marphysa aegypti sp.n., based on molecular and morphological evidence","authors":"A. H. Elgetany, A. El-Ghobashy, A. Ghoneim, Torsten H. Struck","doi":"10.15298/invertzool.15.1.05","DOIUrl":"https://doi.org/10.15298/invertzool.15.1.05","url":null,"abstract":"The annelid family Eunicidae comprises ten genera including the genus Marphysa Quatrefages, 1866. This genus is characterized by a global distribution and has considerable value in the bait industry worldwide. Therefore, the correct delimitation of species is important not only for consideration of its evolution, but also for culturing species from this genus. Marphysa sanguinea (Montagu, 1813) represents a complex of species and its global distribution is not clearly defined. Herein we describe a new species, Marphysa aegypti sp.n., belonging to the M. sanguinea group from the coastal waters of Egypt. This species, which has previously been reported as M. sanguinea, has a high commercial value as it is collected and vastly used by fishermen in Egypt. In our study, we used both molecular (COI barcoding region) and morphological species identification. Our results confirm that this polychaete, which is a common inhabitant of Egyptian coastal waters (i.e., Mediterranean Sea, Red Sea and the Suez Canal), is a distinct species. Our findings further support the view that the polychaete fauna of Egypt needs taxonomic revision. Determination of the polychaete species of Egypt, similarly to other regions of the world, is based on identification keys developed for Northern European species and lacks thorough morphological comparisons. Therefore, all previous records of M. sanguinea in coastal waters of Egypt should be reconsidered as being indeed M. aegypti sp.n. How to cite this article: Elgetany A.H., El-Ghobashy A.E., Ghoneim A.M., Struck T.H. 2018. Description of a new species of the genus Marphysa (Eunicidae), Marphysa aegypti sp.n., based on molecular and morphological evidence // Invert. Zool. Vol.15. No.1. P.71– 84. doi: 10.15298/invertzool.15.1.05","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88430018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.4.01
K. Sanamyan, N. Sanamyan, S. Galkin, V. V. Ivin
Several specimens of benthic siphonophorae of the family Rhodaliidae were recorded during dives of the ROV “Comanche 18” at depths of 1711–1914 m in vicinity of submarine Piyp Volcano located north off Commander Islands in NW Pacific. The specimens were not collected, but recorded in details on video files and photographic images underwater in their natural habitat. Unlike other siphonophores the members of the family Rhodaliidae are benthic. Almost all species of this family are poorly known, and most are known from very few specimens, some of which were collected more than 100 years ago and newer recorded again. Till now rhodaliids were not known from NW Pacific at depths greater than 1000 m. In the present paper we describe a brief history of the family, the morphology of the recorded here specimens basing on photo and video data, and provide a list of all described species of the family with short comments on each. It is shown that the generic name Tridensa Hissmann, 2005 is not available and cannot be used. How to cite this article: Sanamyan K.E., Sanamyan N.P., Galkin S.V., Ivin V.V. 2018. A record of deep-water benthic siphonophore (Siphonophorae: Physonectae: Rhodaliidae ) in vicinity of submarine Piyp Volcano (North-Western Pacific) // Invert.Zool. Vol.15. No.4. P.323–332. doi: 10.15298/invertzool.15.4.01
{"title":"A record of deep-water benthic siphonophore (Siphonophorae: Physonectae: Rhodaliidae) in vicinity of submarine Piyp Volcano (North-Western Pacific)","authors":"K. Sanamyan, N. Sanamyan, S. Galkin, V. V. Ivin","doi":"10.15298/invertzool.15.4.01","DOIUrl":"https://doi.org/10.15298/invertzool.15.4.01","url":null,"abstract":"Several specimens of benthic siphonophorae of the family Rhodaliidae were recorded during dives of the ROV “Comanche 18” at depths of 1711–1914 m in vicinity of submarine Piyp Volcano located north off Commander Islands in NW Pacific. The specimens were not collected, but recorded in details on video files and photographic images underwater in their natural habitat. Unlike other siphonophores the members of the family Rhodaliidae are benthic. Almost all species of this family are poorly known, and most are known from very few specimens, some of which were collected more than 100 years ago and newer recorded again. Till now rhodaliids were not known from NW Pacific at depths greater than 1000 m. In the present paper we describe a brief history of the family, the morphology of the recorded here specimens basing on photo and video data, and provide a list of all described species of the family with short comments on each. It is shown that the generic name Tridensa Hissmann, 2005 is not available and cannot be used. How to cite this article: Sanamyan K.E., Sanamyan N.P., Galkin S.V., Ivin V.V. 2018. A record of deep-water benthic siphonophore (Siphonophorae: Physonectae: Rhodaliidae ) in vicinity of submarine Piyp Volcano (North-Western Pacific) // Invert.Zool. Vol.15. No.4. P.323–332. doi: 10.15298/invertzool.15.4.01","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84394541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/INVERTZOOL.15.3.04
V. Ivanenko, M. Bandera, M. Conradi
Adult female and male of Artogordion ridgeus gen. et sp.n. (Copepoda: Siphonostomatoida) of the family Artotrogidae Brady, 1880 are described from the Gorda Ridge of the North Pacific Ocean. The copepods were found at depths of 2656–2701 m on the margin of a hydrothermal vent field among invertebrates colonizing wood blocks deployed for two years. The new genus differs from other genera of Artotrogidae by a number of primitive features and is close to Myzopontius Giesbrecht, 1895, Sestropontius Giesbrecht, 1899 and Neopontius T. Scott, 1898. It is distinguished from them by segmental fusion pattern of the antennule, the armature of the antennary exopod and the maxillule, and the length and armature of the caudal ramus. This is the second artotrogid to be found in deep water after the discovery of Abyssopontius altus Stock, 1985 in the Indian Ocean. How to cite this article: Ivanenko V.N., Bandera E., Conradi M. 2018. A new deep-sea genus of the family Artotrogidae (Copepoda: Siphonostomatoida) from the Gorda Ridge (North Pacific Ocean) // Invert. Zool. Vol.15. No.3. P.249–266. doi: 10.15298/invertzool.15.3.04
土竹属(Artogordion ridgeus gen. et sp.)雌雄成虫(桡足目:Siphonostomatoida)属Artotrogidae Brady, 1880年，描述于北太平洋的Gorda Ridge。这些桡足类动物是在海底2656-2701米深的热液喷口边缘，在无脊椎动物中发现的，这些无脊椎动物在木块上定居了两年。该新属与其他翼虫科属有许多不同的原始特征，接近Myzopontius Giesbrecht(1895)、Sestropontius Giesbrecht(1899)和Neopontius T. Scott(1898)。其区别在于触角的节段融合模式、触角外足和上突的电枢以及尾支的长度和电枢。这是继1985年在印度洋发现Abyssopontius altus Stock之后，在深海中发现的第二种类足动物。本文摘自:张建军，张建军，张建军。2018。北太平洋戈尔达海岭(Gorda Ridge) Artotrogidae科深海一新属(桡足目:Siphonostomatoida)黑旋风。Vol.15。3号。p.249 - 266。doi: 10.15298 / invertzool.15.3.04
{"title":"A new deep-sea genus of the family Artotrogidae (Copepoda: Siphonostomatoida) from the Gorda Ridge (North Pacific Ocean)","authors":"V. Ivanenko, M. Bandera, M. Conradi","doi":"10.15298/INVERTZOOL.15.3.04","DOIUrl":"https://doi.org/10.15298/INVERTZOOL.15.3.04","url":null,"abstract":"Adult female and male of Artogordion ridgeus gen. et sp.n. (Copepoda: Siphonostomatoida) of the family Artotrogidae Brady, 1880 are described from the Gorda Ridge of the North Pacific Ocean. The copepods were found at depths of 2656–2701 m on the margin of a hydrothermal vent field among invertebrates colonizing wood blocks deployed for two years. The new genus differs from other genera of Artotrogidae by a number of primitive features and is close to Myzopontius Giesbrecht, 1895, Sestropontius Giesbrecht, 1899 and Neopontius T. Scott, 1898. It is distinguished from them by segmental fusion pattern of the antennule, the armature of the antennary exopod and the maxillule, and the length and armature of the caudal ramus. This is the second artotrogid to be found in deep water after the discovery of Abyssopontius altus Stock, 1985 in the Indian Ocean. How to cite this article: Ivanenko V.N., Bandera E., Conradi M. 2018. A new deep-sea genus of the family Artotrogidae (Copepoda: Siphonostomatoida) from the Gorda Ridge (North Pacific Ocean) // Invert. Zool. Vol.15. No.3. P.249–266. doi: 10.15298/invertzool.15.3.04","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83898161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-01DOI: 10.15298/invertzool.15.2.02
G. Vogt
In the period before spawning, freshwater crayfish females develop glair glands on the underside of the pleon. These glands produce the mucus for a gelatinous tentlike structure in which the eggs are fertilized and attached to the pleopods. Long-term observation of females of the sexually reproducing slough crayfish, Procambarus fallax, kept in captivity revealed that the glair glands developed in late winter and late summer of each year independently of the presence of males. In mated females, they secreted their contents shortly before spawning. In contrast, unmated females of slough crayfish did neither empty their glair glands nor spawn. Their glands persisted for an unusually long period of time and disappeared only during the next moult. Apparently, slough crayfish females use information on sperm availability to either spawn or save the resources. Females of marbled crayfish, Procambarus virginalis, a parthenogenetic all-female descendant of slough crayfish, developed glair glands in approximately the same periods of the year but generally spawned despite of the lack of males. These findings suggest that in marbled crayfish glair secretion and spawning is decoupled from mating. Therefore, the species pair P. fallax and P. virginalis seems to be particularly suitable to investigate the regulation of spawning in freshwater crayfish. How to cite this article: Vogt G. 2018. Glair glands and spawning in unmated crayfish: a comparison between gonochoristic slough crayfish and parthenogenetic marbled crayfish // Invert. Zool. Vol.15. No.2. P.215–220. doi: 10.15298/invertzool.15.2.02
在产卵前的一段时间里，雌性淡水小龙虾在pleon的底部发育了玻璃腺体。这些腺体产生粘液，形成胶状的帐篷状结构，卵在其中受精并附着在多足类动物身上。长期观察圈养的雌性有性繁殖的沼泽小龙虾原螯虾(Procambarus fallax)，发现每年的冬末夏末，腺体的发育与雄性的存在无关。在交配的雌性中，它们在产卵前不久就会分泌出体内的物质。相比之下，未交配的雌性泥螯虾既不排空腺体，也不产卵。它们的腺体持续了很长一段时间，直到下一次换毛时才消失。很明显，雌性小龙虾利用精子可用性的信息来产卵或节省资源。大理石纹小龙虾原螯虾(Procambarus virginalis)是泥沼小龙虾的单性生殖全雌性后代，雌性小龙虾在一年中大约相同的时期发育出釉腺，但通常在缺乏雄性的情况下产卵。这些发现表明，大理石纹螯虾的胶质分泌和产卵与交配是分离的。因此，对淡水小龙虾的产卵规律进行研究似乎特别合适。本文出处:Vogt G. 2018。未交配小龙虾的Glair腺体和产卵:雌雄同体的泥沼小龙虾和孤雌生殖的大理石纹小龙虾的比较黑旋风。Vol.15。第二。p.215 - 220。doi: 10.15298 / invertzool.15.2.02
{"title":"Glair glands and spawning in unmated crayfish: a comparison between gonochoristic slough crayfish and parthenogenetic marbled crayfish","authors":"G. Vogt","doi":"10.15298/invertzool.15.2.02","DOIUrl":"https://doi.org/10.15298/invertzool.15.2.02","url":null,"abstract":"In the period before spawning, freshwater crayfish females develop glair glands on the underside of the pleon. These glands produce the mucus for a gelatinous tentlike structure in which the eggs are fertilized and attached to the pleopods. Long-term observation of females of the sexually reproducing slough crayfish, Procambarus fallax, kept in captivity revealed that the glair glands developed in late winter and late summer of each year independently of the presence of males. In mated females, they secreted their contents shortly before spawning. In contrast, unmated females of slough crayfish did neither empty their glair glands nor spawn. Their glands persisted for an unusually long period of time and disappeared only during the next moult. Apparently, slough crayfish females use information on sperm availability to either spawn or save the resources. Females of marbled crayfish, Procambarus virginalis, a parthenogenetic all-female descendant of slough crayfish, developed glair glands in approximately the same periods of the year but generally spawned despite of the lack of males. These findings suggest that in marbled crayfish glair secretion and spawning is decoupled from mating. Therefore, the species pair P. fallax and P. virginalis seems to be particularly suitable to investigate the regulation of spawning in freshwater crayfish. How to cite this article: Vogt G. 2018. Glair glands and spawning in unmated crayfish: a comparison between gonochoristic slough crayfish and parthenogenetic marbled crayfish // Invert. Zool. Vol.15. No.2. P.215–220. doi: 10.15298/invertzool.15.2.02","PeriodicalId":37977,"journal":{"name":"Invertebrate Zoology","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82673485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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