Zeugophorinae, Boving & Craighead, 1931

Sekerka, Lukáš & Vives, Eduard, 2013, Review of Zeugophorinae of New Guinea, with description of Zeugophorella gen. nov. and new synonyms of Zeugophora (Coleoptera: Megalopodidae), Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 747-762 : 756-757

Key to Zeugophorinae known from New Guinea

1 Dorsum shiny, moderately densely punctate, intervals broad and shiny. Vertex of head impunctate to moderately densely punctate. Elytral length/width ratio below 2.1. .......... ................................................................................................................. 2 ( Zeugophora )

– Dorsum opaque, densely punctate, intervals very narrow. Vertex of head very densely punctate. Elytral length/width ratio above 2.3. .................. 7 ( Zeugophorella gen. nov.)

2 Dorsum at least partially metallic. .................................................................................. 3

– Dorsum completely non-metallic. .................................................................................. 5

3 Head and pronotum ochraceous, elytra metallic blue or basally ochraceous. ................ 4

– Head and pronotum black, elytra metallic blue with small pale spot on each humerus. ................................................................................... Zeugophora carolae Gressitt, 1965

4 Eyes deeply emarginate. Elytra metallic purplish-blue or basally ochraceous. Fore legs rust-colored, mid and hind pitchy brown ( Figs 8–9 ). ....................................................... .............................................................................. Zeugophora setsukoae Gressitt, 1965

– Emargination of eyes very soft, thus margin appears entire. Whole elytra metallic violet. All legs pale yellow ( Fig. 7 ). ............................ Zeugophora papuana Medvedev, 2009

5 Dorsum at least partly yellow. ........................................................................................ 6

– Dorsum uniformly black ( Fig. 4 ). ..................... Zeugophora aethiops Medvedev, 1996

6 Antennomeres III and IV subequal in length. Pronotum deep black, almost as wide as long, lateral angulation weak. Head narrower, vertex between eyes 1.6 times wider than first antennomere. Apical fifth of elytra black ( Fig. 6 ). Punctation of elytra overall coarse and uniform. ................................... Zeugophora enduwakombugoensis Sekerka, 2007

– Antennomere IV about one third longer than III. Pronotum dark brown, distinctly wider than long, lateral angles prominent. Head broader, vertex between eyes 2.1 times wider than first antennomere. Elytra yellow only base darkened. Punctation of elytra distinctly finer and sparser on the top of the disc ( Fig. 5 ). ... Zeugophora alticola ( Gressitt, 1959)

7 Elytra and pronotum black. ............................................................................................ 8

– Elytra and pronotum at least partly yellow. .................................................................. 10

8 Antennomere III distinctly shorter than IV. Pubescence on apex of elytra rather short, semiadherent and not projecting backwards. ................................................................. 9

– Antennomere III only slightly shorter than IV. Pubescence on apex of elytra long, erect and projecting to various directions. .......... Zeugophorella clypealis ( Medvedev, 1996)

9 Antennae uniformly black and thick. Pronotum distinctly transverse ( Fig. 14 ). .............. ......................................................................... Zeugophorella riedeli ( Medvedev, 1996)

– Terminal seven antennomeres brown, antennae slender ( Fig. 12 ). Pronotum slightly wider than long ( Fig. 11 ). .............................. Zeugophorella gracilicornis ( Medvedev, 1996)

10 Lateral angulations of pronotum rounded. Pronotum black with narrow basal band. ...... ....................................................................................................................................... 11

– Lateral angulations sub-angulate. Pronotum mostly yellow with irregularly infuscate anterior third. Apical third of elytra irregularly darkened ( Fig. 15 ). ................................. ......................................................................... Zeugophorella elongata ( Gressitt, 1965)

11 Dorsal pubescence golden. Lateral angulations of pronotum weak, thus, base of pronotum only slightly constricted at base. Punctation of pronotum larger, intervals very narrow but distinct. Elytra basally yellow, apical 2/3 black. Terminal four antennomeres rusty, rest pitchy black ( Fig. 10 ). ................................. Zeugophorella bicolora ( Medvedev, 1996)

– Dorsal pubescence silver. Pronotum with distinct lateral angulations and strongly constricted at base. Punctation of pronotum smaller and denser, intervals almost indistinct. Only apical 1/5 of elytra black. Antennae uniformly pitchy brown ( Fig. 13 ). .................. .................................................................................... Zeugophorella pallescens sp. nov.

Figures

Figs 4–15.New Guinean Zeugophorinae.4 – Zeugophora aethiops Medvedev, 1996 (holotype, 3.0 mm), 5 – Z.alticola (Gressitt, 1959) (3.9 mm), 6 – Z. enduwakombugoensis Sekerka, 2007 (holotype, 3.4 mm), 7 – Z.papuana Medvedev, 2009 (paratype, 3.1 mm), 8, 9 – Z. setsukoae Gressitt, 1965 (3.6 mm and 3.9 mm), 10 – Zeugophorella bicolora (Medvedev, 1996) (holotype, 4.7 mm), 11 – Z.clypealis (Medvedev, 1996) (holotype, 5.1 mm), 12 – Z. gracilicornis (Medvedev, 1996) (holotype, 3.8 mm), 13 – Z. pallescens sp. nov. (holotype, 4.9 mm); 14 – Z. riedeli (Medvedev, 1996) (paratype, 5.2 mm), 15 – Z. elongata (Gressitt, 1959) (holotype, 4.75 mm after original description).