Ultrastructure of male reproductive system of Eurydema ventrale Kolenati 1846 (Heteroptera: Pentatomidae)

Abstract

The male reproductive system of Eurydema ventrale Kolenati 1846 is studied morphologically and histologically by using light, scanning and transmission electron microscopes. The reproductive system of the male E.ventrale consists of a pair of testis, a pair of vas deferens, a pair of seminal vesicles, accessory glands, a bulbus ejaculatorius, a pair of ectodermal sacs, and a ductus ejaculatorius. The testicular follicles have three different development zones (growth zone, maturation zone, and differentiation zone). The testes are connected to the seminal vesicles by the vas deferens that is a specialized in sperm storage. Sperm have an elongated head and a tail (flagellum) with an axonema and two mitochondrial derivatives. Vas deferens and seminal vesicles are fine, long, and cylindrical. The seminal vesicle is connected with bulbus ejaculatorius, which is balloon shaped and surrounded with accessory glands. The bulbus ejaculatorius is continuous with ductus ejaculatorius which is connected to the aedeagus.

The histomorphological structure of the male reproductive system of maize leaf weevil Tanymecus dilaticollis Gyllenhal, 1834 (Coleoptera: Curculionidae)

“…The stages of spermatogenesis in the testis follicles clearly show a high level of histological similarity (the development of the germinative cells) of other Curculionoidea and similar among most insect species (Cerezke, ; Suzuki, ; Barker, ; Alzahrani et al, ; Özyurt, Candan, & Suludere, ; Wu et al, ; Candan, Özyurt Koçakoğlu, & Suludere, ; İzzetoğlu & Gülmez, ).…”

Morphological and histological structure of the male reproductive system of the water strider Gerris lacustris (Linnaeus 1758) (Gerridae, Heteroptera)

“…As a result of the comparison with different species, although the number of follicles varies between species, it is seen that each part of the testicular follicle contains a developmental region. As in G. lacustris testis follicles, the testis follicles of P. decempunctatus , Aphelocheirus aestivalis , P. nigrispinus , A. gabrieli , C. marginatus , D. baccarum , G. lineatum , A. amygdali , H. dentatus , E. ventrale , M. bentoi are seen in the following regions from the apex to the base: the germarium, with spermatogonia; the growth zone, where the spermatogonia divide and increase spermatocytes; the maturation and reduction zone, where each spermatocyte undergoes the two meiotic divisions to turn into spermatids; the transformation zone, where spermatids change into spermatozoa (Jyoti, Santosh, & Desai, ; Karakaya, Özyurt, Candan, & Suludere, ; Novais et al, ; Özyurt, Candan, & Suludere, , 2013b; Özyurt, Candan, & Suludere, ; Özyurt, Candan, & Suludere, ; Pires, Ferreira, Guedes, & Serrao, ; Papáček & Soldán, ; Rodrigues, Serrao, Teixeira, Torres, & Teixeira, ; Uceli et al, ). Although, as a result of in light and SEM observations, it was determined that ball shaped sperms seen in G. lacustris were not observed in other examined species of Heteroptera.…”

“…In D. baccarum , G. lineatum , A. amygdali , H. dentatus , and E. ventrale , vas deferens and seminal vesicle, which are fine‐long and cylindrical. There is no outstanding difference in the histological and morphological structure of the vas deferens and the seminal vesicle in these species (Jyoti et al, ; Karakaya et al, ; Papáček & Soldán, ; Özyurt et al, 2013a, ). In D. baccarum , G. lineatum , A. amygdali , and H. Dentatus , these ducts are reddish like testis color (Jyoti et al, ; Özyurt et al, ).…”

“…In C. nigroannulatus , the vasa deferentia are joined to a short ductus ejaculatorius (Jahnke at al., 2006). In C. marginatus , D. baccarum , G. lineatum , A. amygdali , and E. ventrale , the bulbus ejaculatorius is joined with ductus ejaculatorius (Karakaya et al, ; Özyurt et al, 2013a, ). The vas deferentia are connected directly with ductus ejaculatorius.…”

Histomorphological Structure of Male Reproductive System in Capnodis tenebrionis (Linnaeus, 1761) (Coleoptera: Buprestidae)

“…The histological and anatomical stages of spermatogenesis, which has the development of the germinative cells in C. tenebrionis take place within folicules like in most insects. The testes have different types of germ cells (spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids, and nearly mature sperms (Phillips, 1970;Cerezke, 1964;Suzuki, 1988;Barker, 1989;Alzahrani et al, 2013;Özyurt, Candan, & Suludere, 2015;Wu et al 2017;Candan, Özyurt Koçakoğlu, & Suludere, 2018;İzzetoğlu & Gülmez, 2018;Özyurt Koçakoğlu et al, 2019).…”