Valid Names Results
Takagi 2009 (Diaspididae
Type species: Batarasa lumampao Takagi
by monotypy and original designation
accepted valid name
- General Remarks: Generic characters described and defined by Takagi (2009).
- Systematics: This genus is referable to the tribe Odonaspidini, subfamily Aspidiotinae. The adult female has abundant minute ducts, which are not arranged in distinct rows but strewn on both surfaces of the body, especially in paratergal and parasternal areas, and is devoid of pectinae [plates] on the pygidium and prepygidial segments. The second-instar male, nevertheless, is provided with gland tubercles on the ventral surface of the prosoma. In the first instar the antennae are five-segmented, with the third segment longer than each of the second and fourth; the tibia and tarsus in each leg are completely fused.
In the adult female the pygidium is interpreted to be composed of the fifth and succeeding abdominal segments; its dorsal surface is partitioned into a membranous anterior area, which appears to belong to the fifth abdominal segment, and a sclerotized posterior area, which is elaborately and extensively reticulate. The latter area, called 'caudal disc' hereafter, is almost devoid of ducts, and has no marginal scleroses (that mark intersegmental lines in other odonaspidines). The caudal disc is articulated with the anterior area through a strongly sclerotized transverse structure or 'hinge', which extends for most of the basal breadth of the disc. In full-grown specimens the hinge is remarkably developed; in slide-mounted specimens, it is irregularly undulate and overlaps the base of the caudal disc (in situ, the overlapping part should rise above the dermal surface), with the anterior part appearing to be inserted into the body cavity. The ventral surface of the abdomen remains membranous except for the marginal area. The marginal setae on the dorsal disc and those on the ventral side of the eighth segment are dislocated somewhat anteriorly. The anus opens on the membranous anterior area towards the base of the pygidium and thus appears to belong to the fifth abdominal segment; the vulva is placed also close to tbe base of the pygidium nearly at the level of the anus. Invaginated glanduliferous tubes occur on the margin of the pygidium (similar tubes also occur in the second-instar female and male, whereas the caudal disc is peculiar to the adult female). No complete test is formed in the female; the nymphal exuvial casts are not of the bivalve type, but ruptured irregularly, remaining around the body of the female.
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