Courtship in Drosophila is used already to screen genes linked to memory-deficiency and neurodegeneration in humans. However the research community does not understand the mechanism which gives rise to courtship patterns. When a male fly encounters a female fly, he starts to follow her, licks her genitalia, sings a courtship song and eventually bends his abdomen to reach her genitalia [1]. Male...

The goal of sex assignment is to facilitate the best possible quality of life for the patient. Factors such as reproductive system development, sexual identity, sexual function, and fertility are important considerations in this regard. Although some DSD gender assignments are relatively straightforward, those with midstage genital ambiguity and unclear gonadal function represent a major challe...

Eristalis obscura Loew, 1866, is Holarctic in distribution and E. pseudorupium Kanervo, 1938 and£. beltrami Telford, 1970 are junior synonyms of it. E. obscura shows a great morphological variation of the superior lobe in the male genitalia, which is documented by illustrations. The distinguishing characters of E. obscura and other similar species are briefly discussed. The male genitalia of E....

The genus Spatulignatha Gozmány is reviewed. Two new species are described based on the Chinese material: S. arcuata sp. nov. from Guangdong, Hunan and Yunnan, and S. longizonalis sp. nov. from Guangxi. The female genitalia of S. hemichrysa (Meyrick, 1910) and the female of S. idiogena Wu, 1994 are described for the first time, and the previously described female of S. hemichrysa by Gozmány (19...