Megacanthaspis guiyangensis, Niu, Minmin & Feng, Jinian, 2019

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

Megacanthaspis guiyangensis sp. nov.

Material studied.

Holotype female: CHINA, Guizhou Province, Guiyang city, 26°24'35"N; 106°40'13"E. Collected on Oligostachyum lubricum leaves by Niu & Wei, 21.vii.2015, fist specimen from the left end of a row of 5 adult females, clearly indicated on the slide label (NWAFU).

Paratypes: 59 specimens, same data as holotype (at, 1 slide with 1 adult female, 1 slide with 2 adult females, 1 slide with 3 adult females, 4 slides each with 4 adult females, 5 slides each with 5 adult females, 2 slides each with 6 adult females (NWAFU).

Description.

Adult female. ( Figs 1-8 ) Body outline oblong fusiform, with indistinct segmentation. Each antenna with a long seta and a tubercle. Anterior and posterior spiracles without disc pores. The pygidium with sharp marginal processes on abdominal segments VII–VIII: 2 on each side of abdominal segment VII, 2 on abdominal segment VIII between the marginal gland spines ( Fig. 8 ). Marginal gland spines each associated with one microduct, present on abdominal segments V–VIII: one pair, widely separated, on abdominal segment VIII and two pairs on abdominal segments V–VII. Some individuals have one pair of marginal gland spines on abdominal segment IV. Gland tubercles absent. Dorsal macroducts arranged in irregular rows on abdominal segments II–VIII and numbering approximately 23-50 on each side; Marginal macroducts arranged one on each side of abdominal segment VII, and absent on abdominal segment VIII between the gland spines. Ventral microducts smaller than dorsal macroducts, scattered loosely on the cephalothorax and abdomen. Anus rounded, located near the centre of the pygidium. Five groups of perivulvar pores form arcs: 3-5 in the median group, 5-8 in each laterocephalic group, and 4-8 in each laterocaudal group.

Diagnosis.

Megacanthaspis guiyangensis sp. nov. resembles M. hangzhouensis (Wei & Feng, 2012) in body outline, absence of gland tubercles and with 1 microduct on each of the marginal gland spines. The important differences between the pygidia of the two species are shown in Table 1.

Host.

Oligostachyum lubricum ( Poaceae ).

Etymology.

Named after Guiyang, the type locality.

Distribution.

China (Guizhou).

Figures

Figures 1 - 8. Megacanthaspis guiyangensis sp. nov., adult female 1 body 2 antennae 3 anterior spiracle 4 detail of dorsal gland duct 5 ventral microducts 6 perivulvar pore 7 pygidium 8 margin of pygidium (sharp marginal processes).