Megacanthaspis Takagi, 1961

Wei, Jiu-Feng & Feng, Ji-Nian, 2012, Two new species of Megacanthaspis Takagi (Hemiptera, Sternorrhyncha, Coccoidea, Diaspididae) from China, ZooKeys 210, pp. 1-8 : 3

Genus Megacanthaspis Takagi, 1961

Megacanthaspis Takagi, 1961: 97. Type species: Megacanthaspis actinodaphnes Takagi, original designation.

Generic diagnosis.

Female scale. Brown to dark brown, elongate, high convex; exuvia apical. Male scale. white, approximately parallel sides, slightly convex.

Adult female. Body outline elongate, derm membranous. Cephalothorax. Antennae each with a long seta and a tubercle. Anterior spiracles each with a group of trilocular pores, some species also with pores near posterior spiracles. Pygidium. Pygidium rounded along posterior margin, with a series of serrate processes or plates, none of which are sclerotized enough to call lobes.In certain species, this processes or plates degenerate or invisible. Marginal gland spines occurring on the abdomen, each associated with 1 or more microducts. Gland tubercles present or absent,if present, near both anterior and posterior spiracles, others occurring submarginally of abdominal segments I–III. Ducts. Dorsal macroducts short, 2- barred, with the orifice surrounded by a sclerotized rim, forming obscure segmental rows in some species. Ventral microducts as large as or smaller than dorsal ducts. Anal opening situated on centre of pygidium. Perivulvar pores quinquelocular, present in an arc, sometimes divided into a median group and two lateral groups.

Distribution.

Palaearctic and Oriental regions.

Key to adult female Megacanthaspis Takagi