Stegana Meigen 1830
Creators: name: Li, Tong
name: Cao, Huazhi
name: Gao, Jianjun
name: Chen, Hongwei
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana

description: KEY TO SPECIES OF STEGANA (S.S.) FROM MAINLAND CHINA – MALES   
1. Parameres fused with each other......................................................................................................... 2  
– Parameres separated from each other................................................................................................... 5  
 2. Surstylus with two prensisetae; paramere very small, lacking sensilla or setae; aedeagus apically with dense long pubescence....................................................................................................... Stegana sinica Sidorenko   
– Surstylus with one prensiseta at most; paramere developed, with sensilla or setae; aedeagus apically with rod-like processes or tentacle-like setae............................................................................................................ 3  
 3. Parameres strongly sclerotized, nearly black, fused to each other from basal third, with a few sensilla on basal third; aedeagus with c. 16 pairs of short rod-like processes apically...................................................................................................................................................... Stegana polyrhopalia Cao & Chen sp. nov.   
– Small part of parameres black, entirely fused each other, with long setae; aedeagus with tentacle-like setae............................................................................................................................................................4  
 4. Aedeagus almost sclerotized dorsally, apically with three small processes on each side; gonopods with three subequal processes medially and submedially; paramere with two to three long setae and several small sensilla.......................................................................................................... Stegana zhangi Sidorenko   
 – Aedeagus sclerotized laterally, apically without sclerotized processes per side; gonopods with one larger and two smaller processes medially and submedially; paramere with 15–17 strong setae, lacking small sensilla.............................................................................................................. Stegana rotunda Cao & Chen sp. nov.   
 5. Paramere entirely pubescent, lacking setae; aedeagus apically protruded on posteromedian surface............................................................................................................ Stegana apiciprocera Cao & Chen sp. nov.   
– Paramere with long setae, lacking pubescence; aedeagus apically round or flattened on posteromedian surface.........................................................................................................................................................6  
 6. Aedeagus strongly sclerotized on distal third, narrowly membranous along margin, with one strongly sclerotized medial ridge on basal two-thirds, lacking spine-like processes.................................... Stegana cheni Sidorenko   
– Aedeagus sclerotized laterally, with numerous spine-like processes.............................................................7  
 7. Mesonotum dark brown to black medially, brown laterally, with five yellow stripes medially to sublaterally; aedeagal peristome broadened, as long as one third of length in ventral view........................................................................................................................................ Stegana multispinata Cao & Chen sp. nov.   
 – Mesonotum yellow, with four black stripes submedially and laterally, submedial pair divergent on posterior third; aedeagal peristome narrow, emarginate in ventral view.................... Stegana quadrata Cao & Chen sp. nov.
description: Published as part of Li, Tong, Cao, Huazhi, Gao, Jianjun & Chen, Hongwei, 2010, A revision of the subgenus Stegana (s. s.) (Diptera, Drosophilidae) from mainland China, pp. 726-739 in Zoological Journal of the Linnean Society 158 (4) on page 736, DOI: 10.1111/j.1096-3642.2009.00575.x, http://zenodo.org/record/10114684