Lecanodiaspis jiangxiensis Zhang & Wang, 2025

Zhang, Jiangtao, Wang, Keqing, Watson, Gillian W., Liu, Xingping & Wang, Xubo, 2025, A new species of Lecanodiaspis Targioni Tozzetti, 1869 (Hemiptera, Coccoidea, Lecanodiaspididae), with an updated checklist of the false pit scales of China, ZooKeys 1240, pp. 219-238 : 219-238

Lecanodiaspis jiangxiensis Zhang & Wang sp. nov.

Figs 1 , 2 , 3 , 4 , 5

Type material.

Holotype: • Adult ♀ (mounted singly on a slide, CFJAU), CHINA: Jiangxi Province, Yichun City, Fengxin County / Zaoxia Town, Niyang Village / (28°49'16"N, 115°5'40"E) / on branches of Castanea mollissima ( Fagaceae ) / 13. vii. 2022, coll. Jiangtao Zhang . Paratypes: • 13 ♀♀ (including two specimens split into dorsal and ventral surfaces and one damaged specimen lacking anal ring, mounted singly on 13 slides, CFJAU), same data as holotype ; • 2 ♀♀ (mounted singly on two slides, SWFU), same data as holotype .

Description.

Appearance of adult female in life (Fig. 1 ). Rounded to oval, slightly to strongly convex (becoming more convex with age), yellow to brownish-yellow. With a longitudinal medial carina between 8–10 short conical projections, and ~ three longitudinal lateral carinae on each side.

Male test. Not seen.

Slide - mounted adult female (Fig. 2 ) (n = 8): Body oval to subcircular, 4.05–4.95 mm long and 3.75–4.70 mm wide.

Dorsal surface. 8 - shaped pores (Fig. 2 X, V ): Numerous, each pore bent, distributed throughout derm, of two sizes. Larger pores (Fig. 2 X ), each 5–6 μm long, present in a marginal band ~ 2–4 wide, also in irregular clusters on dorsum. Smaller pores (Fig. 2 V ), each 3.5–4.5 μm long, irregularly spaced throughout remainder of derm. Trilocular pores (Fig. 2 W ) occasionally present.

Simple disc pores (Fig. 2 T ): Numerous, evenly distributed, each 2–3 μm in diameter.

Tubular ducts (Fig. 2 Q ): Numerous, evenly distributed, cylindrical, each 27–36 μm long and 3.5–4.0 μm wide.

Setae: Marginal setae (Fig. 2 S ) stiff, spine-like and pointed apically, each with a stout basal socket, 12.5–20.0 μm long. Other short setae rare dorsally, but not shown on Fig. 2 .

Spiracular setae (Figs 2 U, R , 3 A, B ): Two anterior spiracular setae (Figs 2 U , 3 A ), subequal in size, 67.5–85.0 μm long and 7.5–10.0 μm wide, both appearing somewhat concave and bladelike at apex. Two posterior spiracular setae present singly, with one at each outer end of bifid posterior spiracular furrow (Figs 2 R , 3 B ), each seta approximately same length as an anterior spiracular seta.

Cribriform plates: Arranged in two longitudinal rows with four plates in each row. Each plate (Figs 2 P , 4 ) 67.5–75.0 μm in diameter and bearing 15–32 small conical-like setae, sometimes with two or three small conical setae fused together.

Anal ring (Fig. 2 O ): Elliptical, slightly open at posterior end, 60–75 μm in diameter; bearing 10 long setae (12 setae on one specimen), each seta 142–187 μm long, and with three concentric rows of nipple-like projections.

Anal plates (Fig. 2 O ): Narrowly connected at mid-line. Each plate triangular, 150–172 μm long and 125–245 μm wide, wrinkled dorsally and with 3–5 pores; also bearing two fairly stout setae (occasionally with two on one side and three on the other) situated dorsolaterally on posterior half of plate, each seta 20–25 μm long; and with one slender seta on inner margin, 17.5–32.5 μm long, and two short, slender setae at junction of anal lobes, 17.5–20.0 μm long.

Arched plate (Fig. 2 O ): Crescent-shaped, 125–150 μm long.

Anal cleft: Distinct, 175–300 μm long.

Anal lobes: Each lobe slightly rounded, terminating with an approximately apical seta, 75–100 μm long, and 9–14 shorter associated setae, each 15.0–37.5 μm long.

Ventral surface. Antennae (Fig. 2 A ): Well-developed, each usually 9 - segmented (1 specimen with segment IV on one side apparently divided into 2 segments; and another specimen with only 1 complete antenna remaining, reduced to only 5 segments); 365–432 μm long; segment lengths (in μm): I, 42.5–56.5; II, 57.5–75.0; III, 57.5–65.0; IV, 50–65; V, 35.0–52.5; VI, 37.5–47.5; VII, 32.5–41.5; VIII, 22.5–27.5; IX, 13.5–22.5. Setae: segment I without or with one hairlike seta; segment II with one long hairlike seta, one shorter hairlike seta and a sensory pore; segments III, IV, and V each without setae; segment VI usually with one hairlike seta; segments VII and VIII each with a long fleshy seta; and terminal segment (IX) with three long fleshy setae and three or four short slender setae.

Clypeolabral shield: 202–220 μm long and 167–200 μm wide.

Labium (Fig. 2 D ): Triangular, 82.5–95.0 μm long and 95.0–122.5 μm wide, with five short setae on each side.

Legs (Figs 2 C , 5 ): Reduced, fused and irregularly shaped (Fig. 5 ), 2–4 - segmented, each leg 37.5–80.0 μm long; each leg usually with one short seta present at base, sometimes leg apices with claw remnants, occasionally tarsal digitules present (found only on 1 hind leg).

Spiracles (Fig. 2 B ): Anterior spiracles each 82.5–100.0 μm long and 70.0–92.5 μm wide; posterior pair approximately same size. Each anterior spiracle with 3–14 quinquelocular pores in heavily sclerotized area above peritreme; each posterior spiracle with 5–12 quinquelocular pores in similar position. Spiracular furrows containing primarily quinquelocular pores (Fig. 2 E ), each 3.5–4.5 μm in diameter, and a few 4 -, 6 - or 7 - locular pores (Fig. 2 E ) spaced throughout furrows.

8 - shaped pores (Fig. 2 K, L ): Two sizes of 8 shaped pores present on venter. Larger pores (Fig. 2 K ), each 5.5–6.5 μm long, bent, present in a narrow marginal band ~ 1–3 pores wide. Smaller, flat 8 - shaped pores (Fig. 2 L ), each 4.5–5.0 μm long, forming a narrow submarginal band three or four pores wide just inside marginal pore band. Trilocular pores (Fig. 2 M ) occasionally present in this band.

Bilocular pores (Fig. 2 H ): Each 2.0–2.5 μm long, present in submarginal band, reaching posteriorly almost as far as anal lobes.

Simple disc pores (Fig. 2 G ): Each 2–3 μm in diameter, less numerous than those dorsally.

Multilocular disc pores (Fig. 2 N ): Primarily each with ten loculi (occasionally 8, 9, 11 loculi), each 6.5–8.0 μm in diameter, pores usually arranged in six transverse segmental bands across abdomen and one transverse band across cephalothorax; sometimes a few pores present also near mesothoracic leg and on prothorax.

Tubular ducts: Slightly narrower than those on dorsum (Fig. 2 F ), each 32.5–41.0 μm long and 3.0–3.5 μm wide, mainly present on margin. Smaller ducts present posterior to vulvar opening.

Setae: With 17–29 slender setae just anterior to vulvar opening, mostly each 7.5–17.5 μm long, but with one pair much longer, each 125–142 μm long. A pair of slender submedian setae (Fig. 2 I ), each 32.5–75.0 μm long, present on most abdominal segments, also extending to the head. Often with a more-or-less well-defined row of short, stout submarginal setae (Fig. 2 J ), each 10.0–12.5 μm long, associated with submarginal band of flat 8 - shaped pores.

Microspines: Present on inner margins of anal lobes; smaller microspines numerous mid-ventrally on posterior half of abdomen, microspines not shown on Fig. 2 .

Remarks.

Lecanodiaspis jiangxiensis sp. nov. is similar to L. pasaniae ( Borchsenius, 1960) in having the posterior spiracular furrow branched and in feeding on Fagaceae . However, L. jiangxiensis differs from L. pasaniae (character states for the latter given in parentheses) by having: (i) cribriform plates present in two longitudinal rows (absent); (ii) legs present, three pairs (absent, or only the prothoracic legs present); (iii) terminal antennal segment with three fleshy and three or four slender setae (with ~ three fleshy and six slender setae).

Etymology.

The species epithet is formed from the name of the type locality, Jiangxi, combined with the Latin suffix “ - ensis ”, meaning “ from ”.

Figures

Figure 1. Adult females of Lecanodiaspis jiangxiensis Zhang & Wang, sp. nov. on branches of Castanea mollissima (Fagaceae).

Figure 2. Adult female of Lecanodiaspis jiangxiensis Zhang & Wang, sp. nov. A antennae B spiracle C leg D labium E 5 -, 4 -, 6 -, 7 - locular pores F ventral tubular duct G ventral simple disc pore H bilocular pore I ventral submedian seta J ventral submarginal seta K ventral 8 - shaped pore L ventral flat 8 - shaped pore M ventral trilocular pore N 10 -, 8 -, 9 -, 11 - locular pores O anal ring, anal plates, arched plate P cribriform plate Q dorsal tubular duct R posterior spiracular seta S marginal seta T dorsal simple disc pore U anterior spiracular setae V dorsal small 8 - shaped pore W dorsal trilocular pore X dorsal large 8 - shaped pore.

Figure 3. Spiracular setae of Lecanodiaspis jiangxiensis Zhang & Wang, sp. nov. A two anterior spiracular setae B a posterior spiracular seta.

Figure 4. Dorsal cribriform plates of Lecanodiaspis jiangxiensis Zhang & Wang, sp. nov.

Figure 5. Legs of Lecanodiaspis jiangxiensis Zhang & Wang, sp. nov.