Morphology Of Genitalia Research Articles

The Muscular Mechanism of the Male Metasoma and Genitalia of Megachile fortis Cresson (Hymenoptera: Megachilidae)

The terminology pertaining to the structure of the male genitalia of the Hymenoptera has been subject to much confusion. Several systems, many purely descriptive in nature, have previously been set forch. Others were based on the various concepts of the ontogeny of the male genitalia, or on the comparative morphology of the adults. The investigation reported here began as an attempt to synthesize the various terminolopies and to evolve a workable set of terms pertaining to the structure of the male genitalia of the megachilid bees. Accordingly, a study was conducted on the myology of the group with the thought that perhaps an understanding of the comparative musculature might be of value in determining the homologies of the insect genitalia. This paper reports the results of a phase of the investigation on the morphology of the male metasoma, the muscular mechanism of the male metasoma and genitalia, and the gross structure of the internal reproductive organs of Megachile (Phaenosarsus) fortis Cresson. A second portion of the study, pertaining to the comparative morphology of the male genitalia and associated sterna of the Mecgachilidae, will be published later.

Male Genitalia of Lepidoptera: Morphology and Nomenclature II. Morphological Significance of Sacculus and Furca

The sacculus (named by Pierce, 1909) is a reflected flange of the sclerotized part of the valva, occupying the ventroproximal portion on its mesal surface. Such a morphological element is widely found in the male genital apparatus of most specialized forms of Lepidoptera. However, the degree of development is subject to great variation in individual species, and sometimes even its presence may become obscure. The same situation is also encountered in the male genitalia of more primitive forms. The observation throughout all the lepidopterous families now makes it evident that the development of the sacculus has close relationships to the position of the juxta (Pierce, 1909) in relation to both the bottom of the vinculum and the valva; the association of the sacculus with the juxta is noteworthy as one of general rules in the morphology of male genitalia in Lepidoptera.

Comparative Morphology of the Male Genitalia in Lepidoptera

Comparative Morphology of the Male Genitalia in Lepidoptera

The Morphology of the Male Genitalia in Rhynchota

Transactions of the Royal Entomological Society of LondonVolume 73, Issue 1-2 p. 127-267 The Morphology of the Male Genitalia in Rhynchota Hem Singh-Pruthi Ph.D., Hem Singh-Pruthi Ph.D. Charles Abercrombie Smith Research Student, Peterhouse, Cambridge Zoological Laboratory, University of CambridgeSearch for more papers by this author Hem Singh-Pruthi Ph.D., Hem Singh-Pruthi Ph.D. Charles Abercrombie Smith Research Student, Peterhouse, Cambridge Zoological Laboratory, University of CambridgeSearch for more papers by this author First published: August 1925 https://doi.org/10.1111/j.1365-2311.1925.tb02861.xCitations: 16AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume73, Issue1-2August 1925Pages 127-267 RelatedInformation

The Comparative Morphology of the Male Genitalia of the Primitive Lepidoptera.*

The primitive Lepidoptera discussed in this paper include the Jugate Lepidoptera, (Hepialidae and Prototheoridae), the Jugo-frenate Lepidoptera, (Mnesarchaeidae, Micropterygidae, and Eriocraniidae), and the Frenate superfamilies Tineoidea, Euceleoidea, and Bombycoidea.[†][1] The object in this discussion is to compare the male genitalia of these groups of Lepidoptera with each other and with those of nearly related orders of insects, and to ascertain from this comparison the value of these organs in gaining a more complete knowledge of the natural relationships of the insects treated. [1]: #fn-2

The Arris and Gale Lectures ON THE MORPHOLOGY OF THE EXTERNAL GENITALIA OF THE MAMMALS.

The Arris and Gale Lectures ON THE MORPHOLOGY OF THE EXTERNAL GENITALIA OF THE MAMMALS.

The Arris and Gale Lectures ON THE MORPHOLOGY OF THE EXTERNAL GENITALIA OF THE MAMMALS.

The Arris and Gale Lectures ON THE MORPHOLOGY OF THE EXTERNAL GENITALIA OF THE MAMMALS.