Cornopsylla rotundiconis, Luo, Xinyu, Li, Qiang, Li, Fasheng & Cai, Wanzhi, 2013

Luo, Xinyu, Li, Qiang, Li, Fasheng & Cai, Wanzhi, 2013, A revision of the endemic Chinese genus Cornopsylla (Hemiptera: Psyllidae), with potential pests on Zanthoxylum (Rutaceae), Zootaxa 3646 (2), pp. 127-148 : 139-142

Cornopsylla rotundiconis sp. nov.

( Figs 34–44 , 59, 62 )

Adult. Coloration: The only materials at hand are 3 severely discolored alcohol-preserved individuals. Thus the only information that could be given is: Apical 1/4 of antennal segment III, apical 3/5 of IV, apical 3/4 of V and apical 4/5 of VI black; segments VII-X entirely black.

Structures: Body relatively slender and hairy. Head ( Fig. 34 ) large, slightly wider than mesoscutum, inclined from longitudinal body axis by about 60°. Genal processes ( Fig. 34 ) near columnar, longer than vertex along median suture, slightly attenuating apically and divergent with inner margin curved outwards; apex rounded, genal whip setae much longer than normal setae. Metatibia without basal spine, apical spurs 6-8, randomly grouped except for the “thumb” and the “little finger”. Fore wing ( Fig. 41 ) oblong oval, widest at apical 1/3; pterostigma long and narrow, smoothly transiting into vein R1; C+Sc, R1, R+M+Cu1, R, base of Rs and A1+2 with extraordinary long setae, gradually turning into normal tiny pterogostic setae apically; surface spinules present in all cells, leaving wide spinule-free bands along veins; radular spinules present in cells cu1, m2, m1 and r2, in r2 relatively dim.

Male terminalia: Proctiger ( Fig. 35 ) tubular and slightly curved, covered with long setae that grow denser apically. Paramere ( Figs 35 & 36 ) in profile slender, slightly curved caudad, with basal 1/4 rooted in subgenital plate; base nearly trapezoidal and wide, with one hemicycle lobe extending cephalad, then gradually narrowed, subapex widened and curving, making apex strongly curved inward; apical tooth ( Fig. 37 ) small, with tip protruding, acute and pointing cephalad, posterior margin rounded, base not constricted; anterior margin of subapical widened section serrate and rather smooth, with one strong seta growing from each “sawtooth”; outer surface with evenly spaced setation in apical half; inner surface with several short setae subapically, and dense long setae in basal half; three short setae based in inner surface of apical tooth always present, basal-most one not projecting beyond margin. Distal segment of aedeagus ( Fig. 38 ) moderately curved downwards; apical dilatation taking less than 1/3 length of distal segment of aedeagus, smoothly transiting from the latter, with apex near quadrate; ductus ejaculatorius rather thick, with its sclerotised end tube strongly rising upward, far beyond dorsal surface. Subgenital plate ( Fig. 35 ) with one horizontal band of long setae in dorsal margin and evenly spaced setae in ventral surface.

Female terminalia ( Fig. 39 ): Apical margin of perianal ring slightly swollen. Bulging before apical process of proctiger relatively smooth, with its peak located in basal 1/3. Apical process of proctiger relatively thin and moderately rising upward, with dorsal surface near straight; setation in apical process of proctiger asymmetrical by longitudinal body axis, each seta in figure may be absent. Subgenital plate wide and sub globular in basal half, relatively smoothly shrinking in mid, then gradually attenuated apically; several long setae present in basal half of narrow part; membranous part anterior to base with several long setae.

Fifth instar nymph: Coloration: For specimens preserved in absolute ethanol. Body light yellow. All sclerites of head and thorax, wing pads, legs and free sclerites in abdomen yellow. Compound eyes grey. Antenna yellow, with black apices on segments 4–7; segment 8 black except for basal 1/6. Caudal plate both ventrally and dorsally black. Ventral abdominal 2+2 large lateral free sclerites dark brown, 1+1 median free sclerites brown.

Structures: Body margin expanded before fore wing pad, covering anterior 1/3 of the latter, gradually growing congruent with it ( Fig. 42 ). Tarsal arolium ( Fig. 44 ) rather large and wide, fan-shaped, with anterior margin moderately depressed; unguitractor rather broad; lateral lobe broad. Field anterior to circum anal pore field rising upward and strongly extending caudad, forming one “cave” with “roof” dehiscing, covering most of pore field, with posterior margin of inner and outer circum anal pore ring and anus visible ( Fig. 43 ). Outer circum anal pore ring ( Fig. 62 ) complete, consisting of long-narrow suture-shaped pores; posterior margin slightly depressed, anterior margin abruptly depressed. Inner circum anal pore ring ( Fig. 62 ) as a broad band of relatively scattered small ellipse pores; posterior margin complete and slightly depressed in middle, anterior margin broken in middle. 2+2 strong setae present anterior-lateral to anal pore field, with the line connecting their roots slightly curved ( Fig. 43 ).

Materials examined. Holotype: Male, slide mounted, China, Yunnan, Ruili, Hongrui Research Institute of Lemon, on Zanthoxylum sp., 28.iv.2011, Guo Jun.

Paratypes: 1 female, slide mounted; 1 female, dry mounted and put to SEM examination; 5 fifth instar nymph, with same data as holotype.

Host plant. Zanthoxylum sp. (According to Miss Guo Jun, the collector, the specimens were collected on “hua jiao”, a species of Zanthoxylum )

Etymology. This species is named after its blunt genal processes: “rotundus” = “blunt”, “conus” = “cone”.

Figures

FIGURES 34 – 41. Cornopsylla rotundiconis sp. nov., adult. 34. Head, antennae removed; 35. male terminalia, in profile, without distal segment of aedeagus and phallobase; 36. inner view of paramere; 37. dorsal view of apex of paramere; 38. distal segment of aedeagus; 39. female terminalia, inner valvulae removed; 40. apical part of antenna; 41. fore wing of a male. Scale: for 34, 0.150 mm; for 35 & 40, 0.226 mm; for 36 & 38, 0.200 mm; for 37, 0.035 mm; for 39, 0.160 mm; for 41, 0.500 mm.

FIGURES 42 – 44. Cornopsylla rotundiconis sp. nov., fifth instar nymph, female. 42. Overall view, left half shows dorsal aspect, right half shows ventral aspect; 43. caudal plate, ventral view; 44. tarsal arolium. Scale: for 42, 0.500 mm; for 43, 0.140 mm; for 44, 0.050 mm.

FIGURES 57 – 62. SEM photos for Cornopsylla spp. 57. Microscopic structure in vertex of Cornopsylla zanthoxylae Li; 58. Microscopic structure in vertex of Cornopsylla magna sp. nov.; 59. Microscopic structure in vertex of Cornopsylla rotundiconi sp. nov.; 60. Microscopic structure in vertex of Cornopsylla trichotoma Li; 61. circum anal pore field of fifth instar nymph of Cornopsylla magna sp. nov.; 62. circum anal pore field of fifth instar nymph of Cornopsylla rotundiconis sp. nov. Scales given in each figure.