Anomala matangensis, Zorn, 2007

Zorn, Carsten, 2007, Three new species of the genus Anomala S, 1819 from Borneo of the fulvofusca-species group (Coleoptera: Scarabaeidae: Rutelinae), Beiträge Zur Entomologie = Contributions to Entomology 57 (2), pp. 277-283 : 279-280

Anomala matangensis sp. n. (Fig. 2)

Holotype.  “Za 21 | Mt. Matanga , W. Sarawak, G. E. Bryant. 16.II.14. | G. Bryant Coll. B.M.1926-86. | HOLOTYPUS Anomala matangensis sp. n. det. Zorn, 2007” ( BMNH).

Description:

Body shape. Length: 7.8 mm, width: 4.3 mm; elongate oval, dilated behind; strongly convex. Color. Head reddish brown; pronotum reddish brown on the disc, yellowish brown towards the lateral margins; scutellum yellowish; elytra dark brown, with the apical part broadly pale yellow; sutural margin reddish; underside including femora and antennae pale yellowish; propygidium, pygidium, abdominal sternites, tibiae and tarsi reddish brown. Head. Clypeus trapezoid, anterior angles rounded; anterior margin reflexed; punctures moderately fine; frons transversely punctured, somewhat rugose; punctures more fine and sparse towards vertex. Pronotum. Width 1.56 times length; in dorsal view broadest at its base; lateral margins straight and subparallel posteriorly, curved and convergent in the anterior third; anterior angles acute; posterior angles rounded; basal stria complete; whole surface with fine and rather sparse punctation. Elytra. With impressed, coarse and somewhat umbilicate punctures, arranged in regular striae; sparse micropunctation intermixed; primary costae not elevated; subsutural, second and third interstice with one secondary row of punctures, the one of the subsutural interstice irregularly duplicated behind the scutellum; the three inner primary striae weakly sulcate at the apex; humeral and apical protuberance distinct, but not very prominent. Pygidium. Moderately fine punctured; punctures somewhat oblong near the distal margin. Metasternum. Disc sulcate, with minute sparse punctures; towards the lateral margin with very dense, umbilicate punctures and short yellowish setae. Abdominal sternites. Densely, sometimes confluently punctured; with a transverse series of short yellowish setae. Protibia. With a long, acute lateral tooth and a long pointed terminal tooth which is strongly curved outwards; terminal articulated spine short, about 2 times as long as wide. Metatibia. 2.5 times as long as wide, slightly fusiform. Claws. External middle claw and internal front claw cleft; the upper branch of the latter very small and spine-shaped; the lower branch much broader and longer, with an obtuse angle at its inner margin and distinctly excised before the strongly pointed apex. Aedeagus. See figs 6, 7.

Diagnosis:

Anomala matangensismatangensis is very similar to A. fulvofusca but can be distinguished by the different aedeagus ( Figs 5 , 6) and the coloration as described above.The degree of variation of the coloration pattern, however, is uncertain as long as no further material is available.

Etymology: The species epithet is referring to the type locality, Mt. Matang in western Sarawak, Borneo.

Figures

Fig. 4-5: Anomala parastasioides (holotype: Borneo, Sabah); Fig. 4: Aedeagus lateral; Fig. 5: Aedeagus ventral.- Fig. 6-7: Anomala matangensismatangensis (holotype: Borneo, Sarawak); Fig. 6: Aedeagus lateral; Fig. 7: Aedeagus ventral. - Fig. 8-9: Anomala fulvofusca (Sumatra-Utara, Sungei Kopas); Fig. 8: Aedeagus lateral; Fig. 9:Qedeagus ventral.