Aulacaspis guiyangensis sp. n.

(Figs. 64–94)

Material examined. Holotype adult ♀: CHINA: Guizhou Prov., Guiyang County, Huaxi District, N 26º 42’ 58”, E 106º 66’ 79”, 1100 m altitude, on Cinnamomum camphora (Lauraceae), / 19 June 2019, / Feng Tian & Xinyi Zheng leg., mounted singly on a slide (GUGC).

Paratype ♀♀: Same data as holotype, 9 ♀♀ mounted singly on slides (GUGC).

Description. Slide-mounted adult female (n=10): Body 1100–1220 (1107) µm long, 640–780 (645) µm wide, prosoma swollen into an eminent mass, rather square in outline, about the same length as width, widest sub-basally, distinctly wider than postsoma; prosomatic tubercles blunt, frontal margin between prosomatic tubercles rounded, lateral margins posterior to tubercles convex and sloping outwards; metathorax and abd. I approximately equal in width; abd. II protruding laterally, wider than I; posterior abdomen gradually tapering towards posterior end; pygidial margin slightly convex.

Prosoma. Antennae separated by more than half width of clypeus, 55–60 µm; each antenna composed of a small tubercle bearing 1 seta and 1 or 2 sclerotised spines. Anterior spiracles each associated with 20–30 trilocular disc pores; posterior spiracles each with 3–15 disc pores.

Pygidial lobes. Lobes numbering 3 pairs; L 1 mostly sunken into apex of pygidium, basally connected by a welldeveloped slender sclerotized arch, the lobes divergent, widest separation at apices 17–20 µm, each lobe elongate and minutely serrate on mesal margin, with apex bluntly rounded. L 2 and L 3 well developed, bilobular. Pore prominences and marginal processes about half as long as nearby lobes, processes on abd. IV and V low and apically serrate.

Ducts. Submedian dorsal macroducts present on abd. II–VI, abd. II and III each with 2 rows, IV–VI each with a single row; II with front row of 3–6 ducts, rear row 3–7; III with front row 4 or 5, rear row 3–5; IV with 6 or 7; V with 4 or 5; and VI with 2 or 3. Submarginal dorsal macroducts present on abd. II–V, II with a single row of 1–4 ducts; III with 8–13; IV with 6–8; and V with 4–9. Lateral macroducts occurring on abd. II and III, II with 5–8 ducts and III with 5 or 6. Marginal macroducts absent from between L 1; each side with 1 between L 1 and L 2, 2 between L 2 and L 3, 2 on each of abd. V and IV, and 1 or 2 between III and IV. Ventral microducts few, usually numbering no more than 20, scattered, occasionally concentrated near posterior spiracles.

Gland spines. Marginal gland spines on each side numbering 3 or 4 on abd. IV, and 1 on V; with 1 present lateral to each pygidial lobe. Lateral gland spines on each side numbering 3 or 4 on abd. II, and 8–13 on III.

Perivulvar pores in 5 groups, with 20–25 pores in anteromedian group, 35–45 in each anterolateral group and 26–31 in each posterolateral group.

Host plant. Cinnamomum camphora (Lauraceae).

Remarks. Aulacaspis guiyangensis sp. n. is similar to A. spinosa (Maskell 1897) in body shape and the distribution of dorsal macroducts, but can be distinguished by the following characteristics of the adult female (character states of A. spinosa in brackets): (i) abd. IV with marginal gland spines on each side numbering 3 or 4 (3–12); and (ii) lateral gland spines on each side of abd. II and III together numbering 11–17, these of normal length (each side of II and III together with usually more than 20 gland spines, these decidedly elongate).

Etymology. The species name is derived from Guiyang County in Guizhou Province, where the type locality is located, combined with the Latin ending ‘- ensis ’, meaning ‘from’.

Checklist. A checklist of Aulacaspis species in China is provided in Table 1.