کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2778851 | 1153173 | 2008 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The male genital system of the New World Ricinulei (Arachnida): Ultrastructure of spermatozoa and spermiogenesis with special emphasis on its phylogenetic implications
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش حشره شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The male genital system of the New World Ricinulei (Arachnida): Ultrastructure of spermatozoa and spermiogenesis with special emphasis on its phylogenetic implications The male genital system of the New World Ricinulei (Arachnida): Ultrastructure of spermatozoa and spermiogenesis with special emphasis on its phylogenetic implications](/preview/png/2778851.png)
چکیده انگلیسی
This study is the first report on the male genital system and the sperm structure of the South American genus Cryptocellus and provides a second description for the Central American genus Pseudocellus. The spermatids of the Colombian species Cryptocellus narino are elongated and anteriorly lentoid-shaped due to two conspicuous intracellular electron-dense plates. Two cell protrusions are present, which contain in front of the lentoid part the acrosomal complex and parts of the axoneme and nucleus, and behind the lentoid part the continuing axoneme and nucleus. The acrosomal filament originates from a cap-like acrosomal vacuole, extends into the nuclear canal and ends behind the lentoid part. The nucleus runs parallel to the axoneme. The axoneme possesses a typical 9Â +Â 2 microtubular pattern. At the end of spermiogenesis the acrosomal complex, nucleus and axoneme coil within the cell forming cleistospermia as transfer form. Our results of Pseudocellus pearsei confirm an earlier study on that genus which is considered to be not closely related to Cryptocellus. According to the present study the sperm structure of the observed Cryptocellus species is very similar to what is described for Pseudocellus.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arthropod Structure & Development - Volume 37, Issue 5, September 2008, Pages 396-409
Journal: Arthropod Structure & Development - Volume 37, Issue 5, September 2008, Pages 396-409
نویسندگان
G. Talarico, L.F. GarcÃa Hernández, P. Michalik,