Pub Date : 2013-07-12DOI: 10.1080/00269786.1974.10736222
V. Botte
SUMMARY Some aspects of the hormonal control of the oviduct in the lizard, Lacerta sicula Raf., have been studied. Ovariectomy performed before the breeding period, prevents the annual oviduct growth. In ovariectomized females the administration of either estradiol or testosterone induces a significant increase in oviduct growth. These effects seem to be temperature-dependent. These observations confirm that the endocrine activity of the ovary plays a critical role in the regulation of the oviduct.
{"title":"THE HORMONAL CONTROL OF THE OVIDUCT IN THE LIZARD LACERTA SICULA RAF","authors":"V. Botte","doi":"10.1080/00269786.1974.10736222","DOIUrl":"https://doi.org/10.1080/00269786.1974.10736222","url":null,"abstract":"SUMMARY Some aspects of the hormonal control of the oviduct in the lizard, Lacerta sicula Raf., have been studied. Ovariectomy performed before the breeding period, prevents the annual oviduct growth. In ovariectomized females the administration of either estradiol or testosterone induces a significant increase in oviduct growth. These effects seem to be temperature-dependent. These observations confirm that the endocrine activity of the ovary plays a critical role in the regulation of the oviduct.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"279 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74376702","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 : 2013-07-12DOI: 10.1080/03749444.1974.10736792
F. Ferrara
SUMMARY Notes on some species of Periscyphis from Somalia, with a description of four new species: P. hrevicaudatus, P. vandeli, P. somaliensis and P. lanzai. We include a revised dichotomic key to the species of the genus Periscyphis known in Somalia and Ethiopia.
{"title":"OBSERVATIONS ON SOME SPECIES OF PERISCYPHIS (TERRESTRIAL ISOPODS) GATHERED IN SOMALIA","authors":"F. Ferrara","doi":"10.1080/03749444.1974.10736792","DOIUrl":"https://doi.org/10.1080/03749444.1974.10736792","url":null,"abstract":"SUMMARY Notes on some species of Periscyphis from Somalia, with a description of four new species: P. hrevicaudatus, P. vandeli, P. somaliensis and P. lanzai. We include a revised dichotomic key to the species of the genus Periscyphis known in Somalia and Ethiopia.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73637429","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 : 2013-07-12DOI: 10.1080/03749444.1968.10736750
L. Chopard, B. Baccetti
RIASSUNTO In questa nota e descritta una collezione di 22 specie di Ortotteri Ensiferi e Tridactiloidei provenienti dalla Somalia e dall'Etiopia. Di esse circa la meta sono nuove per la regione e due sono nuove per la Scienza.
{"title":"ENSIFÈRES ET TRIDACTYLOÏDES DE SOMALIE ET D'ETHIOPIE: RICERCHE SULLA FAUNA DELLA SOMALIA PROMOSSE DALL'ISTITUTO DI ZOOLOGIA E DAL MUSEO ZOOLOGICO DELL'UNIVERSITÀ DI FIRENZE: XXXI","authors":"L. Chopard, B. Baccetti","doi":"10.1080/03749444.1968.10736750","DOIUrl":"https://doi.org/10.1080/03749444.1968.10736750","url":null,"abstract":"RIASSUNTO In questa nota e descritta una collezione di 22 specie di Ortotteri Ensiferi e Tridactiloidei provenienti dalla Somalia e dall'Etiopia. Di esse circa la meta sono nuove per la regione e due sono nuove per la Scienza.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"21 1","pages":"57-66"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73694535","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 : 2013-07-12DOI: 10.1080/03749444.1972.10736781
Z. Matic
SUMMARY The author has studied six species of Chilopods collected in the Awash National Park (Shoa, Ethiopia); Mecistocephalus modestus (Silvestri), previously known only in Java and New Guinea, is new to African fauna.
{"title":"ON SOME CHILOPODA FROM THE AWASH NATIONAL PARK (SHOA, ETHIOPIA)","authors":"Z. Matic","doi":"10.1080/03749444.1972.10736781","DOIUrl":"https://doi.org/10.1080/03749444.1972.10736781","url":null,"abstract":"SUMMARY The author has studied six species of Chilopods collected in the Awash National Park (Shoa, Ethiopia); Mecistocephalus modestus (Silvestri), previously known only in Java and New Guinea, is new to African fauna.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"339 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73908335","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 : 2013-07-12DOI: 10.1080/00269786.1978.10736321
M. Mazzini
SUMMARY The fine structure of Artemia salina Leach (Crustacea Anostraca) egg-shell at the gastrula stage has been studied with the scanning electron microscope (SEM) and its amino-acids have been analyzed. SEM studies of the morphology of the egg-shell—the first reported for Crustacea—show it to consist of three well-defined layers: a compact inner fibrous layer or embryonic cuticle, a thick alveolar layer and an outer cortical layer. No specialized micropylar area, typical of the eggs of many invertebrate species, has ever been found. The amino-acid composition data reveal a rather uniform amino-acid content. There is no one predominant amino-acid residue: alanine, aspartic acid, serine and proline are the most abundant with similar relative values while sulphur-containing amino-acids (cystine and methionine) have been found only in small quantities. The amino acid composition of A. salina egg-shell has been compared with that of cirripede eggs and the relationships discussed.
{"title":"SCANNING ELECTRON MICROSCOPE MORPHOLOGY AND AMINO-ACID ANALYSIS OF THE EGG-SHELL OF ENCYSTED BRINE SHRIMP, ARTEMIA SALINA LEACH (CRUSTACEA ANOSTRACA)","authors":"M. Mazzini","doi":"10.1080/00269786.1978.10736321","DOIUrl":"https://doi.org/10.1080/00269786.1978.10736321","url":null,"abstract":"SUMMARY The fine structure of Artemia salina Leach (Crustacea Anostraca) egg-shell at the gastrula stage has been studied with the scanning electron microscope (SEM) and its amino-acids have been analyzed. SEM studies of the morphology of the egg-shell—the first reported for Crustacea—show it to consist of three well-defined layers: a compact inner fibrous layer or embryonic cuticle, a thick alveolar layer and an outer cortical layer. No specialized micropylar area, typical of the eggs of many invertebrate species, has ever been found. The amino-acid composition data reveal a rather uniform amino-acid content. There is no one predominant amino-acid residue: alanine, aspartic acid, serine and proline are the most abundant with similar relative values while sulphur-containing amino-acids (cystine and methionine) have been found only in small quantities. The amino acid composition of A. salina egg-shell has been compared with that of cirripede eggs and the relationships discussed.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"3 1","pages":"243-252"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84320637","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 : 2013-07-12DOI: 10.1080/00269786.1987.10736523
J. T. Bradley, M. Mazzini, F. Giorgi
SUMMARY In this work we have attempted to clarify how vitellogenic development is regulated in the stick insect Bacillus rossius (Rossi) (Insecta Phasmatodea Bacillidae). To accomplish this end, ovarian follicles were dissected from adult females and examined ultrastructurally and biochemically after in vivo and in vitro exposures to radioactive amino acids. The data presented here are consonant with the hypothesis that transition from the subterminal to the terminal position in the ovariole is mainly due to the acquisition of vitellogenic competence by the developing follicle. This in all likelihood attained by a restructuring of the follicle cell/oocyte interface without apparently involving a shift in the synthetic patterns of the developing follicle.
{"title":"VITELLOGENESIS IN THE STICK INSECT BACILLUS ROSSIUS (ROSSI) (PHASMATODEA BACILLIDAE)","authors":"J. T. Bradley, M. Mazzini, F. Giorgi","doi":"10.1080/00269786.1987.10736523","DOIUrl":"https://doi.org/10.1080/00269786.1987.10736523","url":null,"abstract":"SUMMARY In this work we have attempted to clarify how vitellogenic development is regulated in the stick insect Bacillus rossius (Rossi) (Insecta Phasmatodea Bacillidae). To accomplish this end, ovarian follicles were dissected from adult females and examined ultrastructurally and biochemically after in vivo and in vitro exposures to radioactive amino acids. The data presented here are consonant with the hypothesis that transition from the subterminal to the terminal position in the ovariole is mainly due to the acquisition of vitellogenic competence by the developing follicle. This in all likelihood attained by a restructuring of the follicle cell/oocyte interface without apparently involving a shift in the synthetic patterns of the developing follicle.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84980842","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 : 2013-07-12DOI: 10.1080/00269786.1972.10736184
R. Dallai
SUMMARY Machilis distincta Janetsch spermatozoon has been studied by both the transmission and scanning electron microscopes. This spermatozoon, otherwise normal in the sequence of its various portions, is endowed with some peculiarities, the most striking of these being its bending on itself head-to-tail at maturity. Owing to the fact that both halves are invested by a common membrane, the wrong impression is gained that the functional unit consists of a pair of spermatozoa. The accessory fibres, compressed by two conspicuous lateral structures are confined to either side of the flagellum. When the spermatozoa reach the spermatheca the accessory fibres are seen to be packed together by a material which is glycoprotein in nature. In the mature sperm both the acrosome and nucleus appear helically coiled and encircled by a sleeve of microtubules.
{"title":"THE ARTHROPOD SPERMATOZOON","authors":"R. Dallai","doi":"10.1080/00269786.1972.10736184","DOIUrl":"https://doi.org/10.1080/00269786.1972.10736184","url":null,"abstract":"SUMMARY Machilis distincta Janetsch spermatozoon has been studied by both the transmission and scanning electron microscopes. This spermatozoon, otherwise normal in the sequence of its various portions, is endowed with some peculiarities, the most striking of these being its bending on itself head-to-tail at maturity. Owing to the fact that both halves are invested by a common membrane, the wrong impression is gained that the functional unit consists of a pair of spermatozoa. The accessory fibres, compressed by two conspicuous lateral structures are confined to either side of the flagellum. When the spermatozoa reach the spermatheca the accessory fibres are seen to be packed together by a material which is glycoprotein in nature. In the mature sperm both the acrosome and nucleus appear helically coiled and encircled by a sleeve of microtubules.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"92 1","pages":"37-61"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80496963","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 : 2013-07-12DOI: 10.1080/00269786.1976.10736283
G. Rosati, F. Verni, P. Luporini
SUMMARY Seventeen stocks of Euplotes crassus (Dujardin) (Ciliata Hypotrichida), each belonging to a complementary mating type, collected from the Somalian and the Tuscan coasts have been examined by electron microscope. Several morphologically distinguishable types of bacteria-like endosymbionts have been shown to live in the cytoplasm of E. crassus cells. Type A endosymbionts appear to be always present in the non-autogamous cells of E. crassus. Indeed, type A was found both in the Tuscan stocks, where it is the only one present, and in the Somalian stocks where it coexists with the more numerous type B endosymbionts. One of the two Somalian autogamous stocks contains type C, while the other has type D endosymbionts.
{"title":"CYTOPLASMIC BACTERIA-LIKE ENDOSYMBIONTS IN EUPLOTES CRASSUS (DUJARDIN) (CILIATA HYPOTRICHIDA)","authors":"G. Rosati, F. Verni, P. Luporini","doi":"10.1080/00269786.1976.10736283","DOIUrl":"https://doi.org/10.1080/00269786.1976.10736283","url":null,"abstract":"SUMMARY Seventeen stocks of Euplotes crassus (Dujardin) (Ciliata Hypotrichida), each belonging to a complementary mating type, collected from the Somalian and the Tuscan coasts have been examined by electron microscope. Several morphologically distinguishable types of bacteria-like endosymbionts have been shown to live in the cytoplasm of E. crassus cells. Type A endosymbionts appear to be always present in the non-autogamous cells of E. crassus. Indeed, type A was found both in the Tuscan stocks, where it is the only one present, and in the Somalian stocks where it coexists with the more numerous type B endosymbionts. One of the two Somalian autogamous stocks contains type C, while the other has type D endosymbionts.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"91 1","pages":"449-460"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80418172","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 : 2013-07-12DOI: 10.1080/00269786.1983.10736422
E. Campantico, A. Guastalla, R. Pirovano
SUMMARY The fine structure of the lateral-line organ was inspected in eight adult specimens of the clawed toad, Xenopus laevis (Daudin), 21 days after hypophysectomy and in eight intact controls. In both groups the occurrence of cells termed «light», «intermediate» and «dark» cells according to the electron-density of their jaloplasm, was observed. Likewise, differences were noticed in the nuclear and mitochondrial characteristics of these cells, and in both the amount and distribution of their synaptic vesicles and synaptic bodies. We suggest that these cells represent progressive changes of the same receptor type, rather than three different cell types. The purpose of the present study was to examine the ultrastructural changes, if any, of the neuromasts correlated to the impairment of their chemosensitivity resulting from hypophysectomy. These findings are discussed in relation to the duration of the experimental treatment and to the functional significance of the sensory cells.
{"title":"ULTRASTRUCTURAL ASPECTS OF THE LATERAL-LINE ORGANS OF THE NORMAL AND HYPOPHYSECTOMIZED CLAWED TOAD, XENOPUS LAEVIS (DAUDIN)","authors":"E. Campantico, A. Guastalla, R. Pirovano","doi":"10.1080/00269786.1983.10736422","DOIUrl":"https://doi.org/10.1080/00269786.1983.10736422","url":null,"abstract":"SUMMARY The fine structure of the lateral-line organ was inspected in eight adult specimens of the clawed toad, Xenopus laevis (Daudin), 21 days after hypophysectomy and in eight intact controls. In both groups the occurrence of cells termed «light», «intermediate» and «dark» cells according to the electron-density of their jaloplasm, was observed. Likewise, differences were noticed in the nuclear and mitochondrial characteristics of these cells, and in both the amount and distribution of their synaptic vesicles and synaptic bodies. We suggest that these cells represent progressive changes of the same receptor type, rather than three different cell types. The purpose of the present study was to examine the ultrastructural changes, if any, of the neuromasts correlated to the impairment of their chemosensitivity resulting from hypophysectomy. These findings are discussed in relation to the duration of the experimental treatment and to the functional significance of the sensory cells.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"6 1","pages":"153-163"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81022276","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 : 2013-07-12DOI: 10.1080/00269786.1978.10736309
E. Ottaviani
SUMMARY A gland system of the hypobranchial type has been observed in the mantle of Paludina vivipara Draparnaud (Gastropoda Prosobranchia) and it has been histomorphologically and histochemically characterized. Three areas have been recognized: two side areas (a branchial and a rectal one) with chemically different mucocytes; a central area, where two cell types are found; the first with a glycoproteic secretion, the second with a proteic secretion. The author emphasizes the differences from the hypobranchial glands of other Prosobranchial Gastropods.
{"title":"A GLAND SYSTEM OF THE HYPOBRANCHIAL TYPE IN THE MANTLE OF PALUDINA VIVIPARA DRAPARNAUD (GASTROPODA PROSOBRANCHIA): A MORPHOLOGICAL AND HISTOCHEMICAL STUDY","authors":"E. Ottaviani","doi":"10.1080/00269786.1978.10736309","DOIUrl":"https://doi.org/10.1080/00269786.1978.10736309","url":null,"abstract":"SUMMARY A gland system of the hypobranchial type has been observed in the mantle of Paludina vivipara Draparnaud (Gastropoda Prosobranchia) and it has been histomorphologically and histochemically characterized. Three areas have been recognized: two side areas (a branchial and a rectal one) with chemically different mucocytes; a central area, where two cell types are found; the first with a glycoproteic secretion, the second with a proteic secretion. The author emphasizes the differences from the hypobranchial glands of other Prosobranchial Gastropods.","PeriodicalId":19014,"journal":{"name":"Monitore Zoologico Italiano-Italian Journal of Zoology","volume":"32 1","pages":"77-86"},"PeriodicalIF":0.0,"publicationDate":"2013-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90816798","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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