{"title":"A light and electron microscopic investigation of the occurrence of Nosema sp. (Microsporida : Nosematidae) in the abdomen of the parasitic wasp Pediobius foveolatus (Hymenoptera : Eulophidae)","authors":"G. Chapman, M. Hooker","doi":"10.2307/3226706","DOIUrl":"https://doi.org/10.2307/3226706","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"13 1","pages":"314-326"},"PeriodicalIF":0.0,"publicationDate":"1992-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81388405","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}
{"title":"Staining of semithin glycol methacrylate sections with azure II and methylene blue","authors":"M. J. Cavey, G. K. Wong, E. Yeung","doi":"10.2307/3226709","DOIUrl":"https://doi.org/10.2307/3226709","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"58 1","pages":"356-359"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91339230","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}
{"title":"Cytoskeletal Elements of Frontonia leucas (Ciliophora: Hymenostomatida)","authors":"R. Gil","doi":"10.2307/3226707","DOIUrl":"https://doi.org/10.2307/3226707","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"43 1","pages":"327-337"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88414599","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}
{"title":"Oochoristica islandensis n. sp. (Cestoda: Linstowiidae) from the Island Night Lizard, Xantusia riversiana (Sauria: Xantusiidae)","authors":"C. R. Bursey, S. R. Goldberg","doi":"10.2307/3226705","DOIUrl":"https://doi.org/10.2307/3226705","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"16 1","pages":"302-313"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82668359","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}
Recent studies on marine protozoa in planktonic ecosystems have focused primarily on taxonomy of ciliates and flagellates and their role in aquatic food webs. Comparable studies of marine amoebae however, have received considerably less attention. The present investigation was carried out in the coastal waters of Sapelo Island, Georgia to obtain a data base and to assess the diversity of genera and species of marine amoebae in the nearshore waters of the southeastern United States. Twenty-nine species, representing 15 genera of marine amoebae, were identified from Georgia coastal surface waters. Paramoeba aestuarina, Platyamoeba langae, Clydonella vivax, Vannella mira, and Mayorella gemmifera, were the most common species observed in culture. The taxonomy of western European marine amoebae was studied by Page (1983), who published an extensive illustrated and descriptive key to most wellknown species. Bovee & Sawyer (1979) published a key to the marine amoebae of the northeastern United States, and Davis et al. (1978) published an account of species recovered from surface and deep waters of the open Atlantic Ocean. More recently, Fernandez et al. (1989) identified well-known and apparently widespread species from the northwest coast of Spain. Sawyer (1990) reviewed the historical significance of "old" and "new" species of marine amoebae. The present study probably is the most extensive survey of marine amoebae from warmer waters of the southeastern Atlantic coast of the United States, with the exception of Schaeffer's (1926) studies in more southern waters of Tortugas Key, Florida. Sapelo Island is an Atlantic barrier island located off the coast of Georgia approximately 80 km south of the industrial port of Savannah. Its shoreline is a typical tidal marsh, where waters are influenced by freshwater runoff and saltwater intrusion at high tide. The island is sparsely inhabited by humans, but has a significant vertebrate fauna, including white tail deer, migratory waterfowl, alligators, and other reptiles. Annual temperatures vary from below freezing in the winter to over 37?C in the summer. The island and its coastal waters are ideally suited for studies of freshwater, soil, and marine protozoa in environments that are relatively free from influences of human activity. The present paper summarizes a three-month investigation (February-May 1987) of the diversity of amoeboid protozoa in both coastal and offshore surface waters surrounding the island. MATERIALS AND METHODS Surface water samples of approximately 250-500 ml were collected in sterile glass bottles and filtered through 0.80-,um filters (Millipore Corporation, Bed' The author expresses sincere appreciation to the University of Georgia Marine Institute at Sapelo Island for allowing him to be a Visiting Scientist during the course of this investigation. Special appreciation is extended to the Director, Dr. James Alberts, and to Drs. Evelyn and Barry Sherr for their hospitality and encouragem
{"title":"Marine amoebae from Georgia coastal surface waters","authors":"D. A. Munson","doi":"10.2307/3226710","DOIUrl":"https://doi.org/10.2307/3226710","url":null,"abstract":"Recent studies on marine protozoa in planktonic ecosystems have focused primarily on taxonomy of ciliates and flagellates and their role in aquatic food webs. Comparable studies of marine amoebae however, have received considerably less attention. The present investigation was carried out in the coastal waters of Sapelo Island, Georgia to obtain a data base and to assess the diversity of genera and species of marine amoebae in the nearshore waters of the southeastern United States. Twenty-nine species, representing 15 genera of marine amoebae, were identified from Georgia coastal surface waters. Paramoeba aestuarina, Platyamoeba langae, Clydonella vivax, Vannella mira, and Mayorella gemmifera, were the most common species observed in culture. The taxonomy of western European marine amoebae was studied by Page (1983), who published an extensive illustrated and descriptive key to most wellknown species. Bovee & Sawyer (1979) published a key to the marine amoebae of the northeastern United States, and Davis et al. (1978) published an account of species recovered from surface and deep waters of the open Atlantic Ocean. More recently, Fernandez et al. (1989) identified well-known and apparently widespread species from the northwest coast of Spain. Sawyer (1990) reviewed the historical significance of \"old\" and \"new\" species of marine amoebae. The present study probably is the most extensive survey of marine amoebae from warmer waters of the southeastern Atlantic coast of the United States, with the exception of Schaeffer's (1926) studies in more southern waters of Tortugas Key, Florida. Sapelo Island is an Atlantic barrier island located off the coast of Georgia approximately 80 km south of the industrial port of Savannah. Its shoreline is a typical tidal marsh, where waters are influenced by freshwater runoff and saltwater intrusion at high tide. The island is sparsely inhabited by humans, but has a significant vertebrate fauna, including white tail deer, migratory waterfowl, alligators, and other reptiles. Annual temperatures vary from below freezing in the winter to over 37?C in the summer. The island and its coastal waters are ideally suited for studies of freshwater, soil, and marine protozoa in environments that are relatively free from influences of human activity. The present paper summarizes a three-month investigation (February-May 1987) of the diversity of amoeboid protozoa in both coastal and offshore surface waters surrounding the island. MATERIALS AND METHODS Surface water samples of approximately 250-500 ml were collected in sterile glass bottles and filtered through 0.80-,um filters (Millipore Corporation, Bed' The author expresses sincere appreciation to the University of Georgia Marine Institute at Sapelo Island for allowing him to be a Visiting Scientist during the course of this investigation. Special appreciation is extended to the Director, Dr. James Alberts, and to Drs. Evelyn and Barry Sherr for their hospitality and encouragem","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"1 1","pages":"360-364"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86123544","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}
The benthic diatom flora of Mono Lake is described from samples taken from three localities at depths of approximately 1, 5, and 10 meters on rock and sediment substrates. Relative abundances of 30 taxa were recorded from duplicate counts of 500 valves from each of 18 samples. Dominant taxa included Navicula crucialis, Nitzschia frustulum, N. latens, N. reimerii sp. nov., N. monoensis, sp. nov. and Anomoeoneis sphaerophora var. minor var. nov.; taxonomy, morphology, and distribution of these taxa are considered. Navicula crucialis, previously recorded from saline lakes in North Africa and highly variable in outline, was most abundant in sediment samples. Anomoeoneis sphaerophora var. minor, Nitzschia reimeri, and N. monoensis were most abundant in deeper waters whereas both N. latens and N. frustulum occurred most frequently in collections from shallow waters. Smaller individuals of N. latens were broader than larger specimens, and some N. frustulum cells resembled N. austriaca. Nitzschia monoensis has numerous girdle bands and prominent external distal raphe ends. Navicula crucialis, A. sphaerophora var. minor, and Nitzschia monoensis were observed with internal valves. Mono Lake, located at the western edge of the Great Basin (Fig. 1), is a hypersaline (95 g/L in 1990) and alkaline (pH 10.0) (Herbst, unpublished data) remnant of Pleistocene Lake Russell. At a current surface elevation of 1,943 m, the lake has fluctuated considerably in the late Holocene (Stine, 1990). During the past 50 years, the lake has undergone a net decline of 14 m and a doubling of salinity, both attributable to diversion of tributary streams by the city of Los Angeles (National Academy of Sciences, 1987). The major ion content is dominated by sodium, with high anion concentrations of bicarbonate in addition to carbonate, chloride, and sulfate (Herbst, 1988). The benthic environment is composed of sand and organic-rich mud sediments over much of the basin. Hard substrates occur as localized calcareous tufa formations, pumice and alluvial granite cobble, and gravel along the west, north, and south shores (Herbst, 1990). The high salinity of Mono Lake restricts macrofaunal diversity to eight known benthic insects, all dipteran larvae (Herbst, 1988) and a single zooplankton species, Artemia monica Verrill. The dominant benthic insect is the alkali fly Ephydra hians Say (Ephydridae), a herbivore that grazes epilithic algae and epipelic microbial mats. Benthic algae from Mono Lake with which diatoms are known to occur include Ctenocladus circinnatus Borzi (Chlorophyceae) ' Portions of this study and support for D. B. H. were provided by a grant from the University of California Water Resources Center. We thank T. J. Bradley for informative discussions and C. W. Reimer for use of the Diatom Herbarium, Academy of Natural Sciences of Philadelphia. Publication costs, in part, are being met by a grant from the Darbaker Fund of the American Microscopical Society. TRANS. AM. MICROSC
Mono湖的底栖硅藻区系是根据在岩石和沉积物底物上大约1、5和10米深的三个地方采集的样本来描述的。从18个样品的500个瓣的重复计数中记录了30个分类群的相对丰度。优势类群为:十字花科Navicula crucalis, Nitzschia frustulum, latens N.， reimerii sp. 11, monensis N.， sp. 11和Anomoeoneis sphaerophora var. minor var. 11;讨论了这些分类群的分类、形态和分布。以前在北非盐湖中记录到的十字形Navicula在轮廓上变化很大，在沉积物样本中含量最多。在较深水域中分布最多的是小圆球异位棘球蚴、雷氏棘球蚴和单斑棘球蚴，而在浅水水域中分布最多的是暗斑棘球蚴和锥状棘球蚴。小个体比大个体更宽，一些小个体的细胞与奥地利小个体相似。单棘棘虫有大量的腰带带和突出的外中缝远端。观察到有内瓣的十字形Navicula crucalis、小球形棘豆A. sphaerophora var minor和斑点棘虫Nitzschia monensis。Mono湖位于大盆地的西部边缘(图1)，是一个高盐(1990年为95 g/L)和碱性(pH值10.0)(Herbst，未发表数据)的更新世拉塞尔湖遗迹。在目前海拔1,943米的湖面上，该湖在全新世晚期波动很大(Stine, 1990)。在过去的50年里，该湖经历了14米的净下降，盐度增加了一倍，这都是由于洛杉矶市分流了支流(美国国家科学院，1987年)。主要的离子含量以钠为主，除了碳酸盐、氯化物和硫酸盐外，阴离子浓度也很高的碳酸氢盐(Herbst, 1988)。底栖生物环境由砂和盆地大部分地区富含有机物的泥沉积物组成。沿着西海岸、北岸和南岸，坚硬的基材以局部钙质凝灰岩地层、浮石和冲积花岗岩鹅卵石以及砾石的形式出现(Herbst, 1990)。Mono湖的高盐度限制了大型动物的多样性，只有八种已知的底栖昆虫，所有的双翅目幼虫(Herbst, 1988)和一种浮游动物，Artemia monica Verrill。占优势的底栖昆虫是碱蝇(碱蝇科)，一种食草动物，以底栖藻类和底栖微生物垫为食。来自Mono湖的底栖藻类已知与硅藻共生，包括Ctenocladus circinnatus Borzi(绿藻科)。这项研究的部分内容和对d.b.h.的支持是由加州大学水资源中心提供的。我们感谢T. J. Bradley提供了翔实的讨论，感谢C. W. Reimer使用了费城自然科学院的硅藻标本馆。出版费用的一部分由美国显微学会的达贝克基金资助。反式。点。MICROSC。Soc。生物医学工程学报，2011(4):338-355。1992. ？ 版权所有，1992年，美国显微学会。此内容于2016年9月3日星期六04:09:50 UTC下载，所有使用须遵守http://about.jstor.org/terms卷111号。1992年10月4日
{"title":"Taxonomy and distribution of benthic diatoms from Mono Lake, California, U.S.A.","authors":"J. Kociolek, D. Herbst","doi":"10.2307/3226708","DOIUrl":"https://doi.org/10.2307/3226708","url":null,"abstract":"The benthic diatom flora of Mono Lake is described from samples taken from three localities at depths of approximately 1, 5, and 10 meters on rock and sediment substrates. Relative abundances of 30 taxa were recorded from duplicate counts of 500 valves from each of 18 samples. Dominant taxa included Navicula crucialis, Nitzschia frustulum, N. latens, N. reimerii sp. nov., N. monoensis, sp. nov. and Anomoeoneis sphaerophora var. minor var. nov.; taxonomy, morphology, and distribution of these taxa are considered. Navicula crucialis, previously recorded from saline lakes in North Africa and highly variable in outline, was most abundant in sediment samples. Anomoeoneis sphaerophora var. minor, Nitzschia reimeri, and N. monoensis were most abundant in deeper waters whereas both N. latens and N. frustulum occurred most frequently in collections from shallow waters. Smaller individuals of N. latens were broader than larger specimens, and some N. frustulum cells resembled N. austriaca. Nitzschia monoensis has numerous girdle bands and prominent external distal raphe ends. Navicula crucialis, A. sphaerophora var. minor, and Nitzschia monoensis were observed with internal valves. Mono Lake, located at the western edge of the Great Basin (Fig. 1), is a hypersaline (95 g/L in 1990) and alkaline (pH 10.0) (Herbst, unpublished data) remnant of Pleistocene Lake Russell. At a current surface elevation of 1,943 m, the lake has fluctuated considerably in the late Holocene (Stine, 1990). During the past 50 years, the lake has undergone a net decline of 14 m and a doubling of salinity, both attributable to diversion of tributary streams by the city of Los Angeles (National Academy of Sciences, 1987). The major ion content is dominated by sodium, with high anion concentrations of bicarbonate in addition to carbonate, chloride, and sulfate (Herbst, 1988). The benthic environment is composed of sand and organic-rich mud sediments over much of the basin. Hard substrates occur as localized calcareous tufa formations, pumice and alluvial granite cobble, and gravel along the west, north, and south shores (Herbst, 1990). The high salinity of Mono Lake restricts macrofaunal diversity to eight known benthic insects, all dipteran larvae (Herbst, 1988) and a single zooplankton species, Artemia monica Verrill. The dominant benthic insect is the alkali fly Ephydra hians Say (Ephydridae), a herbivore that grazes epilithic algae and epipelic microbial mats. Benthic algae from Mono Lake with which diatoms are known to occur include Ctenocladus circinnatus Borzi (Chlorophyceae) ' Portions of this study and support for D. B. H. were provided by a grant from the University of California Water Resources Center. We thank T. J. Bradley for informative discussions and C. W. Reimer for use of the Diatom Herbarium, Academy of Natural Sciences of Philadelphia. Publication costs, in part, are being met by a grant from the Darbaker Fund of the American Microscopical Society. TRANS. AM. MICROSC","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"15 1","pages":"338-355"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75344202","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}
{"title":"Isospora sagittulae, a New Coccidian Parasite (Apicomplexa: Eimeriidae) from the Spotted Antbird (Hylophylax naevioides)","authors":"T. E. Mcquistion, A. Capparella","doi":"10.2307/3226711","DOIUrl":"https://doi.org/10.2307/3226711","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"4 1","pages":"365-368"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79974953","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}
{"title":"Acanthocyclops pennaki n.sp. (Copepoda : Cyclopoida) from the Hyporheic zone of the South Platte River, Colorado, U.S.A.","authors":"J. Reid","doi":"10.2307/3226703","DOIUrl":"https://doi.org/10.2307/3226703","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"44 1","pages":"269-277"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89407850","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}
This first collection of Copepoda (Crustacea) from fresh waters in the Florida Everglades yielded 13 species: the calanoid Osphranticum labronectum, the cyclopoids Acanthocyclops robustus, Eucyclops bondi, Macrocyclops albidus, Mesocyclops americanus, Microcyclops rubellus, Microcyclops varicans, and Tropocyclops prasinus mexicanus, the harpacticoids Cletocamptus deitersi, Onychocamptus mohammed, and Phyllognathopus viguieri, and two previously unknown species: Thermocyclops parvus, described elsewhere, and Eucyclops conrowae, n. sp., described herein. Eucyclops conrowae is distinguished principally by the posteriorly produced pedigers 2-4, caudal rami 3.5 times longer than broad, median terminal caudal setae with short coarse spiniform setules, antennule reaching posterior margin of pediger 2, leg 4 exopodite article 3 with some setae flanged, and leg 4 endopodite article 3 with lateral and distomedial setae short, sclerotized, and blunt. The neotropical species E. bondi is newly recorded for the United States. Specimens of M. albidus resemble tropical rather than European populations in having short caudal rami. As a result of this collection and additional material examined, the known range of M. americanus is extended from Ontario south to Florida and west to Indiana. The previously unknown male of M. americanus is described from specimens collected in the Everglades. The ornamentation of the anal somite and the relative lengths of the leg 4 endopodite article 2 terminal spines distinguished populations ascribed to M. rubellus and M. varicans. The Everglades copepods, collected from a shallow slough, have few species in common with assemblages reported from mainly planktonic collections in central Florida. Especially diaptomid calanoids, common in central and northern Florida, were absent from the Everglades collection. The freshwater copepod crustacean fauna, especially the planktonic species, of central Florida has become well known from numerous reports (Bays & Crisman, 1983; Cowell et al., 1975; Elmore et al., 1984; and others). However, the freshwater copepods of the Florida Everglades are almost completely uninvestigated. To my knowledge, the only previous collection from the area was made by Davis (1948) from Long Lake, a small brackish-water lake (salinity 15.39%o, as measured by Davis) near the south end of Everglades National Park (Fig. 1). Davis reported three species, all since synonymized with other taxa: Pseudodiaptomus coronatus Williams, 1906 (=P. pelagicus Herrick, 1884), 1 I thank Dr. Hans-Walter Mittmann for arranging the loan of specimens from the Friedrich Kiefer Copepod Collection at the Staatliches Museum fur Naturkunde Karlsruhe, Germany. Dr. Richard L. Whitman allowed me to examine his collection of cyclopoid copepods from the Indiana Dunes National Lakeshore, and Ms. Dorinda Partsch authorized the long-term loan of a specimen from this collection to the National Museum of Natural History. Dr. Bruce C. Cowell kindly m
{"title":"Copepoda (Crustacea) from fresh waters of the Florida Everglades, U.S.A., with a description of Eucyclops conrowae n. sp.","authors":"J. Reid","doi":"10.2307/3226612","DOIUrl":"https://doi.org/10.2307/3226612","url":null,"abstract":"This first collection of Copepoda (Crustacea) from fresh waters in the Florida Everglades yielded 13 species: the calanoid Osphranticum labronectum, the cyclopoids Acanthocyclops robustus, Eucyclops bondi, Macrocyclops albidus, Mesocyclops americanus, Microcyclops rubellus, Microcyclops varicans, and Tropocyclops prasinus mexicanus, the harpacticoids Cletocamptus deitersi, Onychocamptus mohammed, and Phyllognathopus viguieri, and two previously unknown species: Thermocyclops parvus, described elsewhere, and Eucyclops conrowae, n. sp., described herein. Eucyclops conrowae is distinguished principally by the posteriorly produced pedigers 2-4, caudal rami 3.5 times longer than broad, median terminal caudal setae with short coarse spiniform setules, antennule reaching posterior margin of pediger 2, leg 4 exopodite article 3 with some setae flanged, and leg 4 endopodite article 3 with lateral and distomedial setae short, sclerotized, and blunt. The neotropical species E. bondi is newly recorded for the United States. Specimens of M. albidus resemble tropical rather than European populations in having short caudal rami. As a result of this collection and additional material examined, the known range of M. americanus is extended from Ontario south to Florida and west to Indiana. The previously unknown male of M. americanus is described from specimens collected in the Everglades. The ornamentation of the anal somite and the relative lengths of the leg 4 endopodite article 2 terminal spines distinguished populations ascribed to M. rubellus and M. varicans. The Everglades copepods, collected from a shallow slough, have few species in common with assemblages reported from mainly planktonic collections in central Florida. Especially diaptomid calanoids, common in central and northern Florida, were absent from the Everglades collection. The freshwater copepod crustacean fauna, especially the planktonic species, of central Florida has become well known from numerous reports (Bays & Crisman, 1983; Cowell et al., 1975; Elmore et al., 1984; and others). However, the freshwater copepods of the Florida Everglades are almost completely uninvestigated. To my knowledge, the only previous collection from the area was made by Davis (1948) from Long Lake, a small brackish-water lake (salinity 15.39%o, as measured by Davis) near the south end of Everglades National Park (Fig. 1). Davis reported three species, all since synonymized with other taxa: Pseudodiaptomus coronatus Williams, 1906 (=P. pelagicus Herrick, 1884), 1 I thank Dr. Hans-Walter Mittmann for arranging the loan of specimens from the Friedrich Kiefer Copepod Collection at the Staatliches Museum fur Naturkunde Karlsruhe, Germany. Dr. Richard L. Whitman allowed me to examine his collection of cyclopoid copepods from the Indiana Dunes National Lakeshore, and Ms. Dorinda Partsch authorized the long-term loan of a specimen from this collection to the National Museum of Natural History. Dr. Bruce C. Cowell kindly m","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"14 1","pages":"229-254"},"PeriodicalIF":0.0,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82769656","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}
{"title":"Some free-living marine nematodes from Northwest Florida, U.S.A. with descriptions of three new species (Nematoda : Chromadorida, Trefusiida)","authors":"E. Keppner","doi":"10.2307/3226609","DOIUrl":"https://doi.org/10.2307/3226609","url":null,"abstract":"","PeriodicalId":23957,"journal":{"name":"Transactions of the American Microscopical Society","volume":"50 1","pages":"199-210"},"PeriodicalIF":0.0,"publicationDate":"1992-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87060007","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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