Anomala linwenhsini Zhao & Zorn, 2022

Zhao, Ming-Zhi & Zorn, Carsten, 2022, Contribution to the genus Anomala Samouelle, 1819 (Coleoptera: Scarabaeidae Rutelinae) of China and adjacent regions. Part II: six new species from Taiwan and Hainan, Zootaxa 5168 (2), pp. 175-195 : 180-182

Anomala linwenhsini Zhao & Zorn , new species [Ž信异fflŵoi/Ž信條ŵff]

( Figs. 4 , 8A–B , 9A–C )

Type material. Holotype: ♂ ( NMNS), Taiwan Island, Pingtung , Shuangliu [= Ḇ流], Yintun [= 尹屯], 2008-VI-29, Wen-Hsin Lin leg. Paratypes: 1♂ ( HKPC), Nantou , Sun Moon Lake, 4-VI-1981, Chin-Kin Yu leg. ; 2♂♂ ( CCPC, ZMPC), Pingtung , Fengkang [= RAE], 2008-VI-11, Wen-Hsin Lin leg. ; 4♂♂, 1♀ ( CZPC), Taitung [actually Pingtung], Schouchia env. [= Ŕ+], 315m, 18.5.2012 , N 22.20670°, E 120.86034°, Walter Grosser lgt.

Description. Holotype male ( Figs. 4A–C , 8A , 9A–C ). Body length: 15.3 mm, greatest width: 7.9 mm.

General appearance. Body shape elongated ovoid, weakly convex. Entirely reddish brown; sutural line of elytra black; joints of tibiae and femora, apices of tarsomeres dark brown.

Head ( Fig. 8A ). Clypeus subrectangular, anterior corner broadly rounded; anterior margin straight and strongly reflexed; surface with dense coarse punctures, somewhat coalescent. Frontoclypeal suture distinct. An inverted triangular area at anterior half of frons rugopunctate, other portions of frons and vertex with dense small punctures. Antennal club longer than antennomeres 2–6 combined. Inner margin of eye with several short setae.

Pronotum. Sides gently arched and convergent anteriad. Anterior angle acute and protruding, posterior angle round. Basal marginal line interrupted before scutellum, other marginal lines complete. With dense annulated small punctures, punctures being coalescent near lateral margins, smooth before scutellum; with a longitudinal medial furrow not reaching the base. Lateral margin with several long setae.

Scutellum. Subtriangular, lateral margin arched. Margins with polished appearance, disc with irregularly distributed small punctures. Disc with one semierect setae (others probably worn out).

Elytra. Intervals convex; strial punctures dense to very dense, annulated and large, punctures of secondary striae irregular in spaces; the whole surface with scattered minute punctures. Interstices I to IV each with a secondary stria; interstice I (the subsutural interstice) broadest, with secondary stria irregularly doubled in basal two third; all secondary striae reaching the level of apical protuberance and usually interrupted, secondary stria of interstice II obsolete from basal fourth to halfway of elytron. Primary costae without additional striae. Humeral umbone and apical protuberance moderately bulging. Lateral carina indistinct. Epipleura with a row of moderately dense long setae. Marginal membrane complete.

Propygidium. With dense transverse large punctures, usually coalescent. Glabrous.

Pygidium. Distinctly bulging, posterior margin protruding. With very dense transverse large punctures, punctures more ovoid near each side; punctures encircling greatest tumidity. Posterior margin with a row of long setae near apex.

Ventral thoracic surface. Hypomeron with irregular striolation and sparse long setae. Collar of mesosternite transversely striolate with dense recumbent short setae. Other portions of mesosternite with shallow small punctures which usually coalescent into irregular striolation, with dense short setae. Ventral metathoracic surface with very dense, shallow and annulated large punctures and dense, rather long setae at each side; with minute punctures and glabrous medially.

Abdominal ventrites. Ventrites 1–2, and anterior half of 3 weakly carinate laterally. Ventrites 2–5 with transverse, small or large punctures, punctures coalescent into striolation in ventrite 6. Ventrites 2–5 each with a transverse row of sparse, recumbent and moderately long setae, the rows broadly interrupted medially; ventrite 6 with a complete row of recumbent long setae along posterior margin.

Legs. Protibia tridentate, apical and second teeth blunt at apex, proximal tooth indistinct; apical tooth almost extending to level of apex of protarsomere 2. Inner spur situated at the level of the second tooth. Inner protarsal claw and outer mesotarsal claw split apically, lower branches longer and distinctly wider, the lower branch of inner protarsal claw strongly concave internobasally. Protarsus slightly thickened. Each tarsomere 5 with an indistinct internomedial protuberance. Outer metatarsal claw slightly longer than inner one. Mesofemoral surface with transverse rows of long setae, several irregular rows between two regular rows, one at anterior margin and another situated behind middle, the row at posterior margin regular with shorter setae. Metafemoral surface with three transverse rows of sparse long setae, the first row at anterior margin and somewhat doubled, a second row situated behind middle with robuster setae, and a third row at posterior margin with short setae.

Male genitalia. See Fig. 9A–C . Parameres weakly asymmetric: the left paramere acute at apex, the right paramere round at apex. Ventral plate elongated and curved downwards at apex.

Paratypes. Males. Body length: 14.4–15.9 mm, greatest width: 7.7–8.5 mm. External features and shape of parameres consistent. One male with a long erect seta on disc of pronotum. Female ( Figs. 4D–F , 8B ). Body length: 14.7 mm, greatest width: 8.2 mm. Generally similar to male. Anterior margin of clypeus weakly reflexed ( Fig. 8B ); antennal club almost equally as long as antennomeres 2–6 combined. Pygidium less bulging. Protibia and protarsomeres thinner than in male; apical protibial tooth tongue-shaped, extending to level of base of protarsomere 3; inner spur situated slightly before the level of the proximal tooth; internomedial protuberance of protarsomere 5 small; upper and lower branches of inner protarsal claw and outer mesotarsal claw almost equal in length, but the lower branches are still thicker.

Differential diagnosis. In the Anomala linwenhsini -species group, A. linwenhsini Zhao & Zorn , new species is easily characterized by the subrectangular clypeus in both sexes (subtrapezoidal in other three species). The parameres are almost symmetric with the apices slightly unequal. The ventral plate of aedeagus is elongated and curved downwards at apex (apex not elongated in other three species). Moreover, this is the largest species of this group.

Remarks. The specimen identified as Anomala inconcinna in Yu et al. (1998) was examined and proved to be A. linwenhsini Zhao & Zorn , new species. This new species is active in March to April according to Yu et al. (1998), but the type series suggests that it is also active in May and June.

Etymology. This species is named after the late Mr. Wen-Hsin Lin, who collected some of the type specimens.

Distribution. Taiwan Island (Pingtung, Nantou).

Figures

FIGURE 4. Habitus of Anomala linwenhsini Zhao & Zorn, new species. A–C, holotype; D–F, female paratype. A, D, dorsal view; B, E, lateral view; C, F, ventral view. Scale bar = 5 mm.

FIGURE 8. Head of Anomala spp. A, A. linwenhsini Zhao & Zorn, new species, holotype; B, ditto, female paratype; C, A. wutaiensis Zhao & Zorn, new species, holotype; D, ditto, female paratype; E, A. kanshireiensis Zorn & Zhao, new species, holotype; F, ditto, female paratype; G, A. inclinata Zhao & Zorn, new species, holotype; H, ditto, female paratype. Scale bar = 5 mm.

FIGURE 9. Male genitalia (A–M) and everted endophallus (N–Q) of Anomala spp. A–C, A. linwenhsini Zhao & Zorn, new species, holotype; D–G, A. wutaiensis Zhao & Zorn, new species, holotype; H–J, N–O, A. kanshireiensis Zorn & Zhao, new species, holotype; K–M, P–Q, A. inclinata Zhao & Zorn, new species, holotype. A, D, H, K, dorsal view; B, F, I, L, N, P, right lateral view; E, O, Q, left lateral view; C, G, J, M, ventral view. Sc 1, scale bar for A–M = 2 mm; Sc 2, scale bar for N–Q = 5 mm.