Anomala Samouelle

Jin, Mengjie, Weir, Tom, Ślipiński, Adam & Pang, Hong, 2014, Description of a new species of Anomala Samouelle (Coleoptera: Scarabaeidae: Rutelinae) from Northern Territory, Australia, Zootaxa 3872 (5), pp. 591-600 : 592-593

Anomala Samouelle

Anomala Samouelle, 1819: 191 . Type species Melolontha frischii Fabricius, 1775 . Full synonymy see Zorn 2006a: 256.

Diagnosis. Anomala can easily be separated from remaining genera of Australian Rutelinae by having the tergite and sternite of the 7th abdominal segment completely fused into a ring without visible sutures ( Fig. 2J ), and by a combination of 9 antennomeres ( Fig. 1H ) and the base of the labrum horizontal and separated by membrane from the clypeus.

Diagnostic combination. Length 6.0–18.0 mm. Body elongate oval, convex; dorsum glabrous, green or brown often with iridescent shine. Head with completely visible frontoclypeal suture ( Fig. 1A ). Labrum ( Fig. 1J ) separated by exposed membrane from clypeus, horizontal at base and not extending far beyond clypeus ( Fig. 1C ); anterior edge emarginate medially with dense bristles laterally. Antenna with 9 antennomeres ( Fig. 1H ). Mandibles multidentate apically, asymmetrical ( Figs 1A–G ) with right mandible having larger and more complex mola ( Fig. 1F ); prostheca membranous with dense fringe of marginal setae. Maxilla ( Figs 1A, 1M, 1I ) with lacinia absent; galea well developed bearing several heavily sclerotised teeth apically; terminal maxillary palpomere without sensory palp organ. Labium ( Figs 1B, 1K ) heavily sclerotised, ligula weakly emarginate medially, without median projection or process.

Prothorax transverse; prosternum ( Fig. 2B ) short in front of coxae with narrow prosternal process; procoxal cavities open externally and internally. Scutellar shield well developed ( Fig. 2E ). Mesoventrite flat, broad anteriorly, separated from small mesanepisternum by complete sutures ( Fig. 2D ). Mesoventral process narrow, extending beyond middle of mesocoxal cavity. Mesocoxal cavity obliquely transverse; laterally closed by broad mesepimeron. Mesotrochantin narrow, exposed. Metaventrite with complete discrimen. Elytra 1.3 times as long as wide and 2.5 times as long as pronotum, with fine strial punctures; epipleura glabrous, obsolete near apices; apical half with membranous border ( Fig. 4E ).

Hind wing ( Fig. 1L ) about 2.6 times as long as wide; radial bending zone relatively short, setose; R-M loop quite strong; apical field about 0.4 times total wing length, with two RP veins, MP1+2 very long and detached to base; medial field with 4 free veins, MP3+4 extremely narrow and detached, AA vein forms a basal cell with Cu; anal lobe well-developed, anal notch absent, jugal veins reduced to one.

Abdomen with 7 visible segments (II–VIII, ventrites 1–7) ( Figs 2I, J ); segments I and II connate and mostly hidden under very large and flat metacoxae ( Fig. 2H ); intercoxal process indistinct. Abdomen with 7 pairs of spiracles, terminal spiracle exposed and placed on evenly sclerotised and fused sternite and tergite VII. Pygidium convex in profile, apex narrowly rounded.

Male genitalia trilobate, symmetrical; parameres short, simple, weakly bilobed; phallobase with laterobasal apodemes; penis simple, with slender struts; endophallus with exposed setal patch. Spiculum gastrale short and “Y” shaped ( Fig. 4K ), associated plates large, not overlapping at centre. Ovipositor very short ( Fig. 4J ); gonocoxites sclerotised, kidney shaped, without gonostyli; small spermatheca and a pair of large sclerotised vaginal glands open to short vagina and bursa copulatrix.

Comments. The diagnosis and the diagnostic combination provided above are based on the Australian representatives of Anomala only.

Figures

FIGURES 2 A – J. Anomala katherine new species, male: A, Prothorax, dorsal; B, prothorax ventral with both coxae removed; C, metendosternite, ventral; D, pterothorax, ventral with both coxae removed; E, pterothorax, dorsal with wings removed; F, proleg; G, mesoleg; H, metaleg; I, abdomen, ventral; J, abdomen, dorsal.

FIGURES 1 A – M. Anomala spp. A – L, A. katherine new species: A, Head, dorsal; B, head, ventral; C, head, lateral; D, left mandible, dorsal; E, right mandible, dorsal; F, left mandible, inner; G, right mandible, inner; H, antenna; I, maxilla, ventral; J, labrum; K, labium, ventral, L, hind wing. M, A. antiqua (Gyllenhal): maxilla, ventral.

FIGURES 4 A – K. Anomala spp. A – C, Posterior part of pronotum and scutellum; D, left elytron showing striae and intervals; E, apical portion of elytra showing membranous border; F, pygidium; G, lateral portion of pronotum showing colour pattern; H, male protarsus; I, female protarsus; J, female ovipositor and internal track; K, spiculum gastrale. A, A. antiqua (Gyllenhal); B, F, G, A. aeneotincta Fairmaire; C – E, H – K, A. katherine new species.