Scymnomorphus Weise,1897: 303. TS: Scymnomorphus rotundatus Weise, 1897.
Scotoscymnus Weise, 1901: 458 (unnecessary replacement name).
Sukunahikona Kamiya, 1960: 23. TS: Sukunahikona japonica Kamiya, 1960.
Species of Scymnomorphus are very similar to other genera of Sukunachikonini, but the 2-segmented antennal club and very narrow prosternal process are unique to members of Scymnomorphus.
Body minute, not exceeding 1.5 mm, distinctly convex; mostly winged. Dorsal vestiture consisting of intermixed long and much shorter hairs. Head transverse; clypeal and frontal regions usually prominent, sometimes rostrate. Antenna 10-segmented with 2-segmented club. Pronotum almost always with distinct line or ridge separating anterior corners from pronotal disc, sometimes extending along lateral edge. Prosternum strongly reduced and narrow; prosternal process reduced to a narrow carina. Elytral punctures at least along suture in apparent rows; epipleuron narrow, incomplete apically, without cavities; lateral part of elytron with an epipleural carina originating at humeral angle and extending to level of epipleura, parallel to lateral margin; carina sometimes very closely appressed to margin, forming thick, double edge. Abdomen with six visible ventrites, ventrite 5 truncate posteriorly; ventrite 1 and 2 almost entirely fused. Postcoxal line of abdominal ventrite 1 incomplete or reaching lateral margin, usually with associated pits and pores. Male terminalia. Parameres and phallobase asymmetrical; penis guide asymmetrical; parameres reduced and fused with phallobase. Penis stout, consisting of single sclerite; basal capsule weak to absent. Apodeme of male sternum 9 broad and plate-like. Female terminalia. Coxites triangular, about as long as broad; styli terminal, well developed, with apical setae; infundibulum absent; sperm duct simple, uniform in diameter. Spermatheca multi-cameral, sclerotised; spermathecal accessory gland adjacent to sperm duct
Distribution and Biology
Circumtropical, recently recorded from Australia. Adults and larvae are feeding on diaspidine scale insects.
Kamiya H. 1960. A new tribe of Coccinellidae (Coleoptera). Kontyű; 28, 22-26, pl. 3.
Miyatake M. 1994. Revisional studies on Asian genera of the subfamily Sticholotidinae (Coleoptera: Coccinellidae). Memoirs of the College of Agriculture, Ehime University, 38: 223-292.
Sasaji H. 1971. Fauna Japonica Coccinellidae (Insecta: Coleoptera). Academic Press Japan, Tokyo, ix+340 pp, xv plates.Bemerkungen. Deutsche Entomologische Zeitschrift, 1900: 446-459.
Slipinski, S.A. 2007. Australian Ladybird Beetles (Coleoptera: Coccinellidae) their biology and classification. ABRS, Canberra. 286 pp.
Slipinski, A. and W. Tomaszewska, 2005. Revision of the Australian Coccinellidae (Coleoptera). Part 3. Tribe Sukunahikonini. Australian Journal of Entomology, 44: xx
Weise J. 1897. Coccinellen aus Ostafrika (Usambara). Deutsche Entomologische Zeitschrift, 1897 (2): 289-304.
Weise J. 1901. Beschreibungen africanischer Chrysomeliden nebst synonymischen
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