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匹配条件: “Stephen R. Goldberg” ,找到相关结果约233870条。
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Reproductive cycle of the salmon-bellied racer, Mastigodryas melanolomus (Serpentes, Colubridae), from Costa Rica
Stephen R. Goldberg
Phyllomedusa : Journal of Herpetology , 2006,
Abstract: The purpose of this paper is to present new information on the reproductive cycle of M. melanolomus from Costa Rica based onhistological examination of gonadal material from museum specimens. The first information on the timing of the testicular cycle is alsopresented.
Notes on reproduction of Peters’ Leaf-toed Gecko, Phyllodactylus reissii (Squamata, Gekkonidae), from Peru
Stephen R. Goldberg
Phyllomedusa : Journal of Herpetology , 2007,
Abstract:
Reproduction in the Yellow-spotted night lizard, Lepidophyma flavimaculatum (Squamata, Xantusiidae), from Costa Rica
Stephen R. Goldberg
Phyllomedusa : Journal of Herpetology , 2009,
Abstract: The purpose of this note is to add information on reproduction of L. flavimaculatum from a histological examination of gonadal materialfrom museum specimens from five Provinces of Costa Rica. The first information on the testicular cycle is presented. Minimum sizes forreproduction of males and females are given.
Reproductive cycle of the Namib giant ground gecko, Chondrodactylus angulifer (Squamata: Gekkonidae)
Stephen R. Goldberg
African Zoology , 2011,
Abstract: The reproductive cycle of the Namib giant ground gecko, Chondrodactylus angulifer, from southern Africa was described from a histological examination of gonadal material from museum specimens. Males followed a seasonal testicular cycle in which (based on available specimens) the major period of spermiogenesis occurred between September and December. The onset of spermiogenesis is not known as specimens from May to August were not available. Testes in regression were found in January, February and March. Testes in recrudescence were found in January, February, March and April. Females with enlarged ovarian follicles (>5mmlength) were found in January/February and September to December. Mean clutch size for 36 females was 1.7 ± 0.47 S.D., range: 1–2. Evidence is presented that more than one clutch may be produced in the same reproductive season.
Reproductive cycle of the Namaqua sand lizard, Pedioplanis namaquensis (Squamata: Lacertidae), from southern Africa
Stephen R. Goldberg
African Zoology , 2011,
Abstract: The reproductive cycle of the Namaqua sand lizard,Pedioplanis namaquensis, from southern Africa is described from histological examination of gonadal material from museum specimens. Males followed a seasonal testicular cycle in which sperm was produced in January–March and September–December. Testes in regression were present in March and May. Females with enlarged ovarian follicles (>4 mm length) or oviductal eggs were collected between November and February. Clutch size for 14 females was 3.8 ± 0.97 S.D. eggs, range 3–5. Histological evidence is presented that two clutches may be produced in the same reproductive season.
Helminths of two lizard species, Lepidophyma flavimaculatum and L. reticulatum (Squamata: Xantusiidae), from Costa Rica
Stephen R. Goldberg,Charles R. Bursey
Phyllomedusa : Journal of Herpetology , 2011,
Abstract: We examined two species of xantusiid lizards, Lepidophyma flavimaculatum Duméril, 1851 and L. reticulatum Taylor, 1955 from Costa Rica for the presence of helminths.
Helminths of seven species of lacertid lizards from southern Africa
Stephen R. Goldberg,Charles R. Bursey
African Zoology , 2011,
Abstract: Two hundred and forty five lacertid lizards representing seven species (Heliobolus lugubris, Ichnotropis squamulosa, Meroles anchietae, M. cuneirostris, M. suborbitalis, Pedioplanis lineoocellata, P. namaquensis) from southern Africa were examined for helminths. Adults of one species of cestode, Oochoristica ubelakeri, and four species of nematodes, Maxvachonia dimorpha, Parapharyngodon rotundatus, Spauligodon smithi, Thubunaea fitzsimonsi and metacestodes of a cyclophyllid cestode, the nematodes, Abbreviata sp. and an undetermined ascarid species, and an acanthocephalan species (as cystacanths) were found. Mean helminth species richness for adult helminths was 2.4 ± 1.3 S.D. (range = 1–4 per host species).
Helminths from three species of African chameleons
Stephen R. Goldberg,Charles R. Bursey
African Zoology , 2011,
Abstract: Three species of African chameleons (Chamaeleo gracilis, C. jacksoni and C. johnstoni) were examined for helminths. Two species of Cestoda (Oochoristica truncata and tetrathyridia of Mesocestoides sp.)and four species of Nematoda (Oswaldocruzia chamaeleonis, Parapharyngodon kenyaensis, Raillietnema chamaeleo, and Strongyluris elegans
Helminths of four species of gekkonid lizards from southern Africa
Stephen R. Goldberg,Charles R. Bursey
African Zoology , 2011,
Abstract: One hundred and seven specimens of four species of gekkonid lizards from southern Africa,Chondrodactylus angulifer, Pachydactylus bibronii, Pachydactylus capensis and Ptenopus garrulus, were examined for helminths. One species of cestode, Oochoristica ubelakeri, an undetermined cyclophyllid metacestode, six species of nematodes, Maxvachonia dimorpha, Parapharyngodon rotundatus, Skrjabinelazia ornata, S. petersi, Spauligodon smithi, Thubunaea fitzsimonsi, an undetermined ascarid larva, and an undetermined cystacanth were found. Seven new host records are reported. Mean helminth species richness for the four gekkonid species was 3.0 ± 0.8 S.D., range = 2–4.
New Family, New Genus, New Species of Acanthocephala (Echinorhynchida) from the Lizard, Sphenomorphus granulatus (Sauria: Scincidae), from Papua New Guinea
Charles R. Bursey, Stephen R. Goldberg and Fred Kraus
The Open Parasitology Journal , 2007, DOI: 10.2174/1874421400701010007]
Abstract: Sauracanthorhynchus sphenomorphicola n. gen., n. sp. from the intestines of the skink Sphenomorphus granulatus (Scincidae) from Papua New Guinea is described and illustrated. Sauracanthorhynchus sphenomorphicola is characterized by a subterminal, spheroid proboscis supporting 25 hooks arranged in 10 alternating longitudinal rows of 2 and 3; apical hooks slightly shorter than medial and posterior hooks. The trunk is commaform with an anterior expansion; 2 contiguous ovoid testes are located in the anterior third of the trunk. Sauracanthorhynchus sphenomorphicola is sufficiently different from other species assigned to the Echinorhynchida that a new family, Sauracanthorhynchidae is erected for it.
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