Neuterthron truncatulum, Qin, Dao-Zheng, 2007

Qin, Dao-Zheng, 2007, Two new species of the Chinese endemic delphacid genus Neuterthron Ding (Hemiptera: Fulgoromorpha) from Yunnan and Shaanxi Provinces, Zootaxa 1547, pp. 59-64 : 62-64

Neuterthron truncatulum n. sp.

( Figs. 14–25 )

Type material. Holotype, male (brachypterous): Haoping temple, Taibai, Qinling mountain, Shaanxi Province, China, 9.vii.2006, coll. Daozheng Qin. Paratypes, 52 males (brachypterous): same data as holotype ( NWAFU); 16 males (brachypterous): Xixiang, Shaanxi Province, China, 8.vii.1999, coll. Daozheng Qin ( NWAFU).

Description. Color. Male body with yellowish-white to sordid whitish longitudinal stripe along midline. Veretx yellowish-brown, sublaterally with blackish-brown stripes extending to end of frons. Eyes, genae, forewing, male abdomen dark; genae scattered with three yellowish-brown spots. Antennae yellowish-brown. Pronotum black except the posterolateral angle of pronotum sordid. Mesonotum black. Dorsum and venter of male abdomen with irregular sordid patches laterally on each segment. Pygofer black. Parameres blackishbrown. Brachypterous wings lustrous and speckled with pale flecks. Fore- and midfemora, basal half of metafemora blackish-brown. Some specimens with antennal segment I and basal half of II sordid, apical half of II yellowish-brown. Specimens from Xixiang with orange-brownish pronotum, longitudinal stripe of male body milky-whitish; genae brown; forewing sordid brownish.

Structure. Body length (brachypterous male) 1.88–2.02, width at tegulae 0.69–0.78. Head including eyes narrower than pronotum (0.91:1), vertex shorter medially (0.22–0.24) than wide at base (0.25–0.26), anterior margin slightly sinuate, lateral carinae subparallel except where expanded behind eyes, in lateral view meeting lateral carinae of frons with obtuse angle at fastigium, basal compartment wider at base than greatest length (~ 2.2:1). Frons longer (0.51–0.56) than wide (0.24–0.26), lateral carinae concave between eyes, nearly straight towards apex. Postclypeus wider at base than at apex of frons, post- and anteclypeus together approximately 0.65x frons length, median carina well defined. Rostrum reaching past mesotrochanters. Antennal segments terete, surpassing frontoclypeal suture, segment II longer (0.19–0.25) than I (0.10–0.13). Pronotum medially slightly shorter than vertex, lateral carinae of pronotum diverging towards but not reaching posterior margin, pronotum width 0.71–0.76, length 0.18–0.20. Mesonotum longer (0.32–0.35) than vertex and pronotum respectively, lateral carinae slightly diverging caudad, reaching posterior margin. Forewing length 1.16– 1.24, not attaining end of abdomen. Metatibiae ca. 1.2 times longer than metatarsi together, metabasitarsus (0.32–0.38) slightly longer than tarsomere 2 (0.14–0.16) + 3 (0.16–0.18) combined, spinulation of metabasitarsus 7 (2+5), 2nd 4. Calcar (0.28–0.31) slightly shorter than metabasitarsus, thickly foliate, tectiform, with 15–20 small, black-tipped teeth on lateral margin.

Drumming organ with apodemes of second sternite elongated and erected caudad which nearly attaining tergites.

Male genitalia. Pygofer in caudal view with laterodorsal angle strongly flexed ventrally, apices with small irregular teeth; in lateral view, laterodorsal angle elongate and ventrally inflected with apex obtuse. Diaphragm of pygofer with dorsal margin incised medially, lateral margins arched upward, ventrocaudally prolonged into process, in lateral view surpassing posterior margin of pygofer, apex obliquely truncate.

Parameres narrow and moderately diverging in caudal view, apex hook-shaped. Aedeagus tubular, apical half broadened and curved ventrad, left side with subventral row of small teeth subapically, 2 large teeth arising dorsally, distad tooth originating on right, proximad on left, phallotreme dorsad at apex. Opening of diaphragm for parameres with dorsal margin slightly concave medially, lateral margins slightly convex and ventral margin nearly straight. Suspensorium with dorsal plate subtended with vental ring embracing base of aedeagus and connecting on ventral side. Anal segment deeply sunk in dorsal emargination of pygofer, caudoventrally produced into pair of spines, strongly narrowed to pointed apices

Female unknown.

Macropterous form. Unknown.

Etymology. The name is derived from the Latin word “ truncatulus ” in reference to the diaphragm ventrocaudally prolonged into a process bearing a truncate apex.

Distribution. Known only from the type locality in Shaanxi Province (N.W. China).

Remarks and Diagnosis: Neuterthron truncatulum n. sp. resembles Neuterthron hamuliferum Ding , but differs from the latter in the structure of male genitalia, in N. truncatulum the apex of the laterodorsal angle of pygofer bears small irregular teeth rather than incised medially; lateral margins of pygofer smooth and without obtuse process; inner margin of aedeagus with a row of small teeth apically at left side; opening for parameres with dorsal margin slightly concave medially.

Figures

FIGURES 14 – 25. Neuterthron truncatulum n. sp., 14, head and thorax, dorsal view; 15 face; 16, head and pronotum, left lateral view; 17, left forewing; 18, male genitalia, caudal view; 19, same, left lateral view; 20, pygofer, caudal view, anal segment and parameres removed; 21, same, left lateral view; 22, anal segment, aedeagal complex and parameres, left lateral view; 23, aedeagus, dorsal view; 24, anal segment, caudal view; 25, suspensorium, caudal view.