Aulacaspis zunyiensis, Wei, Jiufeng, Jing, Xiaopeng & Zhang, Hufang, 2016

Wei, Jiufeng, Jing, Xiaopeng & Zhang, Hufang, 2016, A new species of Aulacaspis Cockerell, 1893 from China with a key to Chinese species (Hemiptera, Coccoidea, Diaspididae), ZooKeys 619, pp. 13-24 : 16-17

Taxon classification Animalia Hemiptera Diaspididae

Aulacaspis zunyiensis sp. n. Figures 1-9

Material examined.

Holotype and 11 paratypes, adult female. China: Guizhou Province. Zunyi city, longitude 106.9122, latitude: 27.7087, on Cycas revoluta Thunb, 17.vii. 2015, leg. Weijiufeng and Niu Minmin.

Description.

Female scale. Adult female cover convex, circular white; exuvia on front end. Male scale. Not recorded.

Adult female. Slide-mounted adult female 1150-1301 µm long (holotype 1246 µm long); widest part of body 901-950 µm wide (holotype 922 µm wide). Body outline fusiform, derm membranous except for pygidium. Usually widest at mesothorax, lateral abdominal and thoracic lobes well-developed; prosomatic tubercles slightly produced. Cephalothorax. Antennae each with one seta. Anterior spiracles each with 14-16 trilocular pores in a cluster, posterior spiracles without trilocular pores. Pygidial lobes. With three pairs of lobes; L1 well-developed, zygotic basally, much larger than lateral lobes; protruding from pygidial margin, with one deep notch and small serrations on outer margin and one obvious notch on apex. Without setae between median lobes; L2 bilobate, inner lobule rounded, much larger than outer lobule, outer lobule very small, smaller than L3, a pair of obvious paraphyses arising from the mesal margin of the L2 lobes. L3 bilobate, slightly smaller than L2. Gland spines. One present between L1 and L2, one present between L2 and L3, two present on abdominal segment VI, 3-5 on abdominal segment III, 4-5 on abdominal segment IV, 5-6 on abdominal segment V, 1-2 on abdominal segment II, 0-1 on abdominal segment I. Gland spines on segment I and II shorter than those on other segments. Ventral gland tubercles present on submargins of metathorax and abdominal segments I and II. Ducts. Marginal macroducts, of two-barred type, 12.8-16.3 µm long (holotype 16.0 µm long), absent between L1, one present between L1 and L2, two present between L2 and L3, two present on the abdominal segment V. Dorsal macroducts on pygidium and abdominal segments shorter than marginal macroducts; 8.5-10.2 µm long (9.6 µm long), of two-barred type, arranged segmentally in submedian and submarginal rows; submarginal dorsal macroducts present on abdominal segment II to V: 10-11 on segment II, 8-9 on segment III, 5-6 on segment IV, 4-7 on segment V; submedian dorsal macroducts present on segment II to V: 4-6 on segment II, 5-6 on segment III, 4-5 on segment IV, 3-6 on segment V. Lateral macroducts few, 5-7 in total, present between abdominal II and III, of which, 2-3 on segment II, 3-4 on segment III, smaller than dorsal ducts present on abdominal and pygidium. Ventral microducts scattered on pygidium, few. Anal opening small, in holotype posterior margin of anal opening is situated 155 µm from base of L1. Perivulvar pores in five groups, 13-16 in the median group, 30-35 in each of the anteriolateral and 29-30 in each of the posteriolateral groups.

Remarks.

This species is very similar to Aulacaspis maesae (Takagi, 1970) in body shape. But differs in having (character-states on Aulacaspis maesae in brackets): (i) posterior spiracle without trilocular pores (posterior spiracle with trilocular pores); (ii) dorsal macroducts absent from submedial region of abdominal segment VI (present); (iii) dorsal macroducts absent from submedial region of abdominal segment II (present).

Host plant.

Cycas revoluta Thunb.

Etymology.

The specific epithet is named after Zunyi, the type locality.

Distribution.

China (Guizhou).