Oogenesis of Helobdella ampullariae (Hirudinida, Glossiphoniidae)
نویسندگان
چکیده
منابع مشابه
A new species of Helobdella (Hirudinida: Glossiphoniidae) from Oregon, USA.
Helobdella bowermani n. sp. is described from specimens collected in fine sediment of open water benthos of Upper Klamath Lake, Klamath County, Oregon. The new species has pale yellow/buff coloration with scattered chromatophore blotches throughout the dorsal surface, lateral extensions or papillae only on the a2 annulus, dorsal medial row of papillae with small papilla on al and larger papilla...
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A new leech species Helobdella blinnisp. n., is described from Montezuma Well, an isolated travertine spring mound located in central Arizona, USA. In its native habitat, Helobdella blinni had been previously identified as Helobdella stagnalis (Linnaeus, 1758), which was later reclassified to Helobdella modesta (Verrill, 1872). Similar to the European Helobdella stagnalis and North American Hel...
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To understand the evolution of segmentation, we must compare segmentation in all three major groups of eusegmented animals: vertebrates, arthropods, and annelids. The leech Helobdella robusta is an experimentally tractable annelid representative, which makes segments in anteroposterior progression from a posterior growth zone consisting of 10 identified stem cells. In vertebrates and some arthr...
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Placobdella cryptobranchii (Johnson & Klemm, 1977) was originally described from specimens collected from Ozark Hellbenders (Cryptobranchus alleganiensis bishopi) from the North Fork of the White River in Missouri, U.S.A. Leeches collected during August 2009 to August 2011 from five localities in Missouri (including the type locality) facilitated a redescription and molecular characterization o...
متن کاملBatracobdella algira Moquin-Tandon, 1846 (Hirudinida: Glossiphoniidae)--morphometric analysis and internal morphology.
There has been very few papers on leeches of Batracobdella algira. The aim of the presently reported study was to provide the measurements and, for the first time, description and characteristics of the reproductive and digestive systems of B. algira. The material used in this study was collected from frogs, Rana saharica Boulenger, 1913, in April 1987 by H. Hotz in Béja in Tunisia (11 individu...
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ژورنال
عنوان ژورنال: Neotropical Biology and Conservation
سال: 2018
ISSN: 2236-3777
DOI: 10.4013/nbc.2018.132.06