Valid Names Results

Thysanaspis Ferris, 1955 (Diaspididae)

Thysanaspis Ferris 1955c: 31. Type species: Thysanaspis acalyptus Ferris by monotypy . accepted valid name

Systematics: Subfamily ASPIDIOTINAE Tribe LEUCASPIDINI (Normark, et al., 2019) Normark, et al., 2019 determined that Thysanaspis is a monophyletic genus. There are at least two known genera, Anotaspis and Radionaspis, which agree with Thysanaspis in the great reduction of the characters which are available for generic separation and of these genera the present one seems to approach most closely Radionaspis. It differs in the marginal fringe on the pygidium of the 2nd stage, in the absence of the pygidial lobes in the adult and in the presence of the perivulvar pores in the adult (Ferris, 1955c). Mongrovaspis quadrispinosa whose known distribution at present extends from Egypt to the Philippines, may represent the Old World sister-lineage of T. dennorum; were this shown to be the case, the genera Mongrovaspis and Thysanaspis should be synonymized, with Mongrovaspis as the senior synonym. (Normark, et al., 2019)
Structure: Adult female contained within the sclerotized exuviae of the 2nd stage, elongate oval in shape, its pygidium semicircular in form and with merely a pair of small, sclerotized areas on the dorsal side. Margin of pygidium with 4 pairs of slender setae with a single very small duct of an indeterminable nature between the bases of each two pairs (Ferris, 1955c).
General Remarks: Detailed description by Takagi (1961a).