Calletaera trigonoprocessus, Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2014

Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2014, A review of Luxiaria Walker and its allied genus Calletaera Warren (Lepidoptera, Geometridae, Ennominae) from China, Zootaxa 3856 (1), pp. 73-99 : 87-88

Calletaera trigonoprocessus sp. nov.

Figs 46, 47 , 64 , 81 , 98, 113

Description. Head. Antennae yellowish brown diffused with sparse blackish brown scales dorsally, filiform. Frons dark brown, bottom margin yellowish brown, not protruding. Labial palpi yellowish brown mixed with dark brown at terminal half. Vertex pale yellowish brown.

Thorax. Patagia, tegula and dorsum pale yellowish brown. Hind tibia with two pairs of spurs in both sexes, dilated and with hair-pencil in male. Forewing length: male 13–15 mm; female 15–16 mm. Apex of forewing acute; outer margin of forewing straight, that of hind wing serrate between costa and M3 and smooth below M3. Forewing pale yellowish brown; medial line, postmedial line and submarginal line respectively forming a black dot at costa, the last one smallest; antemedial and medial lines indistinct; discal spot pale greyish and shortly linear; postmedial line black, often indistinct and dot-like, straight between costa and M1, bent inwards below M1; a greyish brown band present outside postmedial line; submarginal line greyish white, serrate, flanked by greyish brown and bands, inner band often discontinuous; terminal line black; fringes pale yellowish brown mixed with blackish brown scales at vein ends. Hind wing greyish white; medial line smooth and often indistinct; discal spot black, rounded, larger and more distinct than that of forewing; postmedial line black, almost straight, more distinct than that of forewing; a greyish brown band present outside postmedial line; submarginal line greyish white, protruding outwards at M1, less serrate than that of forewing; flanked by greyish brown and continuous bands; terminal line and fringes similar to those of forewing. Underside yellowish white; transverse lines dark brown; discal spots, medial lines and the bands outside postmedial lines of both wings more distinct than those on upperside. Forewing with R1 anastomosing with R2, Sc connected with R1+2 by a short bar.

Abdomen. First abdominal segment greyish white, remaining segments yellowish brown mixed with black scales between each segment. Tuft of scales present on male sternite III.

Male genitalia. Uncus short, with a subulate process terminally. Gnathos with median process vestigial. Valva deeply bifurcate; dorsal arm bearing long setae, basal half slightly protruding outwards, rounded apically; ventral arm tapered, curved and spine-like apically. Saccus triangular, about one and a half times length of uncus. Juxta short, oval. Aedeagus sclerotized at posterior half, rod-like on one side, almost semicircular and forming a triangular process on the other side; vesica with one long spine-like cornutus, about one-third length of aedeagus.

Female genitalia. Lamella postvaginalis small and elliptical. Ductus bursae with an antrum, weakly sclerotized and striate longitudinally, slightly shorter than length of corpus bursae. Corpus bursae oval; signum small and rounded, with 10 short marginal spines, without central teeth. Seventh sternite weakly sclerotized and shallowly concave posteriorly.

Diagnosis. On the basis of external morphology, this species is very similar to C. subgravata , but the black dot on the forewing costa formed by the medial line is larger and more distinct and the discal spot of the hind wing is larger and more rounded. The most distinct differences are in the male genitalia: the saccus is longer, about one and a half times the uncus in length, while it is shorter and equal to the length of the uncus in C. subgravata ; the posterior half of the aedeagus is semicircular and forms a triangular process on one side, but in C. subgravata , it only has a small spine-like process; the cornutus is much longer than that of C. subgravata . The female genitalia of the species are similar to those of C. dentata , but can be separated by the longer and weakly sclerotized ductus bursae and the smaller signum.

Type material. Holotype, ♂, CHINA: Sichuan ( IZCAS): Emeishan, Qingyinge, 800–1000 m, 12.V.1957, coll. Wang Zongyuan. Paratypes: Guangxi ( IZCAS): 1 ♂, Jinxiu, Luoxiang, 400 m, 15.V.1999, coll. Yuan Decheng. Sichuan ( IZCAS): 25 ♂ 6♀, same locality as holotype, 16.IV–25.VII.1957, 15–20.IX.1957, coll. Huang Keren et al.

Distribution. China (Guangxi, Sichuan).

Etymology. The species is named on the basis of the Latin adjective trigonus (triangular) and the noun processus (a projection), and refer to the terminal process of the aedeagus.

Figures

FIGURES 29 – 47. Adults. 29 – 30. Calletaera obliquata. 29, male (Yunnan); 30, ditto, underside; 31 – 32. C. obvia sp. nov. 31, male (holotype, Hunan); 32, ditto, underside; 33 – 34. C. acuticornuta sp. nov. 33, male (holotype, Hainan); 34, ditto, underside; 35 – 36. C. rotundicornuta sp. nov. 35, male (holotype, Guangxi); 36, ditto, underside; 37 – 38. C. consimilaria. 37, male (Sichuan); 38, ditto, underside; 39 – 41. C. subexpressa. 39, male (syntype of Calletaera digrammata, Lienping, ZFMK); 40, male (Fujian); 41, ditto, underside; 42. C. basipuncta, male (syntype, Taiwan, BMNH); 43. C. postvittata, male (Sumatra, BMNH); 44 – 45. C. dentata sp. nov. 44, male (holotype, Hainan); 45, ditto, underside; 46 – 47. C. trigonoprocessus sp. nov. 46, male (holotype, Sichuan); 47, ditto, underside.

FIGURES 60 – 64. Male genitalia. 60, Calletaera consimilaria; 61, C. subexpressa; 62, C. postvittata (BMNH); 63, C. dentata sp. nov. (holotype); 64, C. trigonoprocessus sp. nov. (holotype). Scale bar = 1 mm.

FIGURES 77 – 98. Aedeagus and sternites of of male and female abdomen. 77 – 81. Aedeagus. 77, Calletaera consimilaria; 78, C. subexpressa; 79, C. postvittata (BMNH); 80, C. dentata sp. nov. (holotype); 81, C. trigonoprocessus sp. nov. (holotype). Scale bar = 1 mm. 82 – 84. Eighth sternite of male abdomen. 82, Luxiaria phyllosaria; 83, Calletaera obliquata; 84, C. subexpressa. 85 – 98. Seventh sternite of female abdomen. 85, Luxiaria mitorrhaphes; 86, L. acutaria; 87, L. amasa; 88, L. emphatica; 89, L. tephrosaria; 90, L. phyllosaria; 91, Calletaera obliquata; 92, C. obvia sp. nov. (paratype); 93, C. acuticornuta sp. nov. (paratype); 94, C. rotundicornuta sp. nov. (paratype); 95, C. consimilaria; 96, C. subexpressa; 97, C. dentata sp. nov. (paratype); 98, C. trigonoprocessus sp. nov. (paratype).

FIGURES 107 – 113. Female genitalia. 107, Calletaera acuticornuta sp. nov. (paratype); 108, C. rotundicornuta sp. nov. (paratype); 109, C. consimilaria; 110, C. subexpressa; 111, C. postvittata (BMNH); 112, C. dentata sp. nov. (paratype); 113, C. trigonoprocessus sp. nov. (paratype). Scale bar = 1 mm.