Two new species from the southern tundra of the Taimyr Peninsula (Russia) are described. Chrysotus tricaudatus Negrobov, Barkalov & Selivanova sp. nov. is similar to C. albibarbus Loew, but can be distinguished by its brown palpus with black setae, yellow hind tibia and base of hind tarsus, and features of the male genitalia. Chrysotus komovi Negrobov, Barkalov & Selivanova sp. nov. is similar ...

BACKGROUND Aphallia or penile agenesis is a rare malformation accompanying with no phallus. This anomaly is extremely rare with abnormality of urogenital system and psychological consequences. Its outbreak is estimated 1 out of 10-30 million births. CASE Reviewing 3 cases of male external genitalia agenesis, which associated with multiple anomalies of musculoskeletal, cardiovascular and genit...

Parainitraceras pickardcanibridgei sp. nov. and Paramitraceras tzotzil sp. nov. from Chiapas, Mexico are described based on specimens previously determined as Paramitraceras granulatum Pickard-Cambridge, 1905 by Goodnight and Goodnight. The male genitalia of the new species and P. granulatum are illustrated with scanning electronic micrographs (SEMs) or drawings derived from them. The importanc...

The species Anthrenus (s. str.) pueblanus sp. nov. from Mexico, Puebla State is described, illustrated and compared with similar species. new differs in the structure of antennae male genitalia. A key to Nearctic Geoffroy presented.

Abstract Introduction Male genitalia are thought to ensure transfer of sperm through direct physical contact with female during copulation. However, little attention has been given their pre-copulatory role respect sexual selection and conflict. Males the fruitfly Drosophila pachea have a pair asymmetric external genital lobes, which primary structures stabilize copulatory complex male genitali...

Two new species of Varma Distant, 1906, V. falcata Chang & Chen, sp. n. (China: Guizhou) and V. lobata Chang & Chen, sp. n. (China: Guizhou) are described and illustrated. The female genitalia of four speices including two known species are described and illustrated for the first time. The diagnostic characters of this genus are redefined. A checklist to the species of Varma in China is given. ...