Megacanthaspis Takagi, 1961

Niu, Minmin & Feng, Jinian, 2019, A new species of Diaspididae, Megacanthaspis guiyangensis (Hemiptera, Coccomorpha) from China, ZooKeys 858, pp. 71-76 : 72-73

Megacanthaspis Takagi, 1961

Megacanthaspis Takagi, 1961: 97.

Type species.

Megacanthaspis actinodaphnes Takagi by monotype and original designation.

Generic diagnosis.

Adult female. Body elongate and slender, with metathorax and free abdominal segments not strongly produced; derm membranous. Each antenna with a long seta. Anterior spiracles with disc pores, and posterior spiracles of some species also with disc pores. Gland tubercles present caudad of anterior spiracles, laterocaudad of posterior spiracles and submarginally on 1-3 anterior abdominal segments. Pygidium rounded along posterior margin, all species without lobes, some species with a marginal series of serrate processes or plates. Marginal gland spines pre sent on the abdomen, each with one or more microducts. Dorsal macroducts present on abdomen and arranged in segmental rows but not in a well-defined series. Ventral ducts are the same size or smaller than dorsal ducts. Anal opening situated in the centre of pygidium. Perivulvar pores with five groups or connected to form an arc.

Remarks.

The genus Megacanthaspis , like other groups such as Thysanaspis and Pygalataspis , has non-glanduliferous plates that are well developed but does not have distinct lobes. Thysanaspis and Pygalataspis have no gland spines. Members of the genera Megacanthaspis , Kuwanaspis , and Nikkoaspis all have plates and gland spines.