Cacopsylla (Hepatopsylla) cinereosignata, Luo, Xinyu, Li, Fasheng, Ma, Yanfang & Cai, Wanzhi, 2012

Luo, Xinyu, Li, Fasheng, Ma, Yanfang & Cai, Wanzhi, 2012, A revision of Chinese pear psyllids (Hemiptera: Psylloidea) associated with Pyrus ussuriensis, Zootaxa 3489, pp. 58-80 : 69-72

Cacopsylla (Hepatopsylla) cinereosignata sp. n.

( Figs 33–43 )

Adult. Coloration: Body brown. Vertex light brown, fore angles and mid of the posterior margin yellow; discal foveae black. Genal process yellowish brown, darker apically. Antennae dark brown, with black apices on segments III–VI and segments VII–X entirely black. Ocelli orange; compound eyes red. Thoracic terga yellow to brown, with black stripes, median stripe in mesoscutum brown. Legs yellow, dorsal surface of femora irregularly blackened, apical tarsal segment dark brown. Fore wing ( Fig. 40 ) transparent, veins black, C+Sc and pterostigma light yellow; marking near apex of claval suture light black, with margin obscure; centre of cell cu2 with one obscure light grey oblong marking, successive with the marking near apex of claval suture. Abdominal segments blackish orange to entirely black. Male terminalia black. Female proctiger black in the basal half, yellow in the apical half.

Structures: Body glabrous and relatively slender. Head moderately inclined from longitudinal body axis, narrower than mesoscutum. The section of border between vertex and gena above the antennal fossa relatively concave, suppressing the long and narrow area of vertex above it, forming a shallow gap nearly parallel with lateral margin of vertex ( Fig. 33 ). Discal foveae deep. Vertex ( Fig. 34 ) finely sculptured with microscopic setae and scaly micro structures that are near elliptical, relatively prominent, and moderately spaced from each other. Genal processes ( Fig. 33 ) cone-shaped, slightly shorter than vertex along median suture and relatively widely divergent, covered with long setae; apex relatively acute and slightly raised upward. Antenna long and relatively thick, terminal setae ( Fig. 39 ) not as long as each other, the longer one about twice as long as the shorter one, and about as long as antennal segment X. Metatibia with well developed basal spine, apical spurs arranged in (1+3+1). Fore wing ( Fig. 40 ) oblong oval, widest at apical 1/4; pterostigma relatively long, ending in the apical 1/3 of cell r1; cell cu1 relatively larger, turning of vein Cu1a relatively smooth; surface spinules present only in cell cu2, with the field seemingly guided along the claval suture; 4 sets of radular spinules present in cells r2, m1, m2 and cu1, in r2 less developed and varies in size among individuals.

Male terminalia relatively small. Proctiger ( Fig. 35 ) simple and slightly arched, covered with short setae. Paramere ( Fig. 35 & 37 ) lamellar and slender, anterior margin expanded into one thin and narrow extension, posterior margin slightly sinuate; apex tooth-shaped, moderately inflexed and projecting cephalad; erect setae present in both inner and outer surface, in anterior margin rather short and sparse, in basal half of inner surface and posterior margin especially long and dense. Apical dilatation ( Fig. 36 ) of aedeagus rounded in the tip without forming a hook; sclerotised end tube of ductus ejaculatorius moderately curved apically and slightly projecting beyond the dorsal margin of apical dilatation. Subgenital plate ( Fig. 35 ) near triangular in profile, with several setae that vary in length in the dorsal margin and dense short setae in the ventral surface.

Female terminalia ( Fig. 38 ) short. Proctiger convex dorsally, with a shallow transverse gap in the mid, lying cephalad to the convex; setae of varied length present in dorsal-lateral surface, longest at top of the convex; apex blunt; laterally and apex of the apical 2/3 of apical part covered with moderately dense peg setae, the involved field completely surrounded by fields of short setae. Ventral surface of subgenital plate sparsely covered with short setae and peg setae.

5th instar nymph. Coloration: For specimens preserved in absolute ethanol and not dissected. Body general color yellow. Sclerites yellow to dark brown. Compound eyes crimson. Apical 2/3 of antennal segment 7 black.

Structures: Body oblong oval. Dorsal aspect ( Fig. 41 ) unevenly covered with capitate setae that vary in length in general. Ventral surface of abdomen ( Fig. 41 ) covered with simple setae that are longer laterally. Micro spinules present in both dorsal and ventral aspects, fields as shown in Fig. 41 ; in dorsal aspect short, lamellar and multicuspid; in ventral aspect long, spinous and unicuspid. Ocular seta ( Fig. 41 ) capitate and relatively long. A short capitate seta ( Fig. 41 ) present behind compound eye in submargin of dorsal surface. Antenna ( Fig. 41 ) slender, 7-segmented, with a rhinarium on apices of segments 3 and 5, two rhinaria on segment 7. A sclerite with a spiracle present in ventral surface between praecoxa and mesocoxa, and a sclerite with a spiracle present in ventral surface between mesocoxa and metacoxa ( Fig. 41 ). Fore wing pad with a line of 9–12 relatively short capitate setae along outer margin, hindwing pad with two capitate setae in distal angle ( Fig. 41 ). Dorsal surface of mesotibia with 1 long and 1 relatively short capitate setae; dorsal surface of metatibia with 1 long capitate setae ( Fig. 41 ). Tarsal arolium ( Fig. 43 ) petiolate and fishtail, relatively narrow apically. 2+2 lateral free sclerites ( Fig. 41 ) bearing a spiracle each present in ventral surface of abdomen. Caudal plate ( Fig. 42 ) relatively large, with a pair of spiracle on bilateral sides of circum-anal pore ring. Outer circum-anal pore ring ( Fig. 42 ) oval, with anterior margin sharply depressed, posterior margin weakly depressed and lateral margin not depressed. Inner circum-anal pore ring ( Fig. 42 ) generally following the shape of the outer. Ventral surface of caudal plate ( Fig. 42 ) with 2+2 simple setae right anterior to outer circum-anal pore ring, 2 simple setae within the suture, a hemicycle row of simple setae from around the spiracles to anterior of anal suture, a series of simple setae near anterior margin and a series of simple setae near posterior margin. Abdominal margin ( Fig. 41 ) decorated with 7 pairs of long and 3 pairs of short capitate setae.

Material examined. Holotype: male, dry mounted, China, Gansu, Zhujiahetan, Sanshilipu, Hezheng, on Pyrus ussuriensis , 10.ix.2011, Ma Yanfang.

Paratypes: 8 male, 11 female with same data as holotype, along with numerous nymphs.

Non-paratypic specimens: Additional specimens from the same series are preserved in absolute ethanol.

Etymology. From Latin, cinereus = grey, signatus = marked. This species is named after its obscure light grey oblong marking in cell cu2.

Remarks. This species displays conspicuous intraspecific variation in the shape of cell cu1, which in some individuals is taller than in Fig. 40 , exceeding the shape of that of C. chinensis summer form ( Fig. 28 ).

Figures

FIGURES 33 – 40. Cacopsylla (Hepatopsylla) cinereosignata sp. nov., adult. 33. Head, without antennae; 34. microscopic structure of denoted part of vertex; 35. male terminalia, without distal aedeagus segment; 36. distal aedeagus segment; 37. inner view of paramere; 38. female terminalia, inner valvulae removed; 39. antennal segment X; 40. fore wing. Scale: for 33, 0.16 mm; for 34, 0.064 mm; for 35, 36 & 38, 0.2 mm; for 37 & 39, 0.32 mm; for 40, 0.55 mm.

FIGURES 41 – 43. Cacopsylla (Hepatopsylla) cinereosignata sp. nov., nymph. 41. Overall view, left half shows dorsal aspect, right half shows ventral aspect; 42. ventral surface of caudal plate; 43. tarsal arolium and claws. Scale: for 17, 0.6 mm; for 18, 0.2 mm; for 19, 0.075 mm.

FIGURES 20 – 29. Cacopsylla (Hepatopsylla) chinensis (Yang & Li, 1981), adult. 20. Head, antennae removed; 21. microscopic structure of denoted part of vertex; 22. male terminalia, without distal aedeagus segment; 23. distal aedeagus segment; 24. inner view of paramere; 25. female terminalia, inner valvulae removed; 26. antennal segment X of summer form; 27. antennal segment X of winter form; 28. fore wing of summer form; 29. fore wing of winter form. Scale: for 20, 0.16 mm; for 21, 0.064 mm; for 22, 23 & 25, 0.2 mm; for 24, 26 & 27, 0.32 mm; for 28 & 29, 0.3 mm.