Guyanemorpha Erwin, 2013

Erwin, Terry L., 2013, Beetles that live with ants (Coleoptera, Carabidae, Pseudomorphini): A remarkable new genus and species from Guyane (French Guiana), Guyanemorpha spectabilis gen. n., sp. n., ZooKeys 358, pp. 11-23 : 13-14

Guyanemorpha Erwin gen. n.

Type species.

Guyanemorpha spectabilis Erwin, sp. n.

Proposed english vernacular generic name.

Guyane False-form beetles

Adelphotaxon.

Probably Notopseudomorpha (Baehr, 1997) (see Erwin and Geraci 2008 for phylogeny).

Description.

Head ( Fig. 2 ) without supraorbital setigerous punctures, nor any accessory setae; frontal impressions absent. Labrum barely visible with anterior margin shallowly emarginate, quadrisetose; clypeus markedly wide, nearly obscured in dorsal aspect by protruding frons, with obtuse setiferous lateral corners. Eyes slightly convex; small gena with numerous stout setae. Antenna short, just reaching anterior coxa in repose; antennomeres 3-9 slightly wider than 1-3, and appearing slightly flattened. Mandible markedly flattened with a very short and acute apex; outer margin ventral of the scrobe without short stout setae. Maxillary palpi markedly short, 3-segmented, palpomeres slightly depressed, palpomere 3 truncate apically. Labial palpus with short bisetose palpomere 2; palpomere 3 markedly securiform and robust, its distal margin mostly membranous with sensory organs.

Prothorax. Pronotum ( Fig. 1 ) much wider than head, transverse, with narrowly beaded margins; without a pair of setigerous punctures each side, apical, lateral and posterior margins with fringe of short stout setae; hind angles obtuse, broadly rounded. Prosternal process unisetiferous subapically, intercoxal process feebly beaded.

Pterothorax. Metepisternum elongate and markedly narrowed posteriorly, the outer margin about 2 times greater in length than the anterior margin, posterior margin about 0.2 times anterior margin.

Elytra. Elytron ( Fig. 1 ) tapered, markedly narrower apically, width of elytra about equal to that of pronotum at widest point, apical margin truncate with evenly rounded humerus, interneurs and intervals effaced; parascutellar stria absent, scutellum hidden, parascutellar puncture present, marked; without fixed discal setae, surface glabrous. Lateral marginal (umbilical) series of 10 setae, arrayed throughout and widely spaced; lateral margin with fringe of short stout setae.

Hind wings. Macropterous. Venation ( Fig. 3 ).

Legs. Short and depressed, femur posteriorly channeled for reception of tibia in repose; antennal comb notch very shallow; tibial spurs normal; anterior tarsi of male with tarsomeres 2-4 dilated slightly, ventrally each with two laterally placed rows of adhesive articulo-setae.

Abdomen. Abdominal sterna III-VII with patches of short setae and each of IV-VII with a single row of erect ambulatory setae numbering 2 to 8 setae; V and VI in male each with dense row of yellowish robust setae separated medially.

Male genitalia ( Fig. 4 ). Phallobase hooded with small orifice, dorsum not crested; phalloshaft arched throughout its length, diameter sub-rounded to somewhat depressed dorso-ventrally; phalloapex produced, sharp, rounded, markedly depressed dorso-ventrally; endophallus orifice elongate, endophallus with dense patches of microtrichia. Parameres (C) moderately short compared to those of genus Pseudomorpha , nearly equal in length, left slightly longer and much broader than right, each apically glabrous. Ring sclerite (E) normal for family.

Female ovipositor and genital tract ( Fig. 1 ). Gonocoxite 2 falcate, base about as long as blade, latter relatively short, pointed distally; margins without ensiform setae; with short preapical nematiform seta.

Figures

Figure 1. Guyanemorpha spectabilis sp. n., female holotype, ADP 132101; Risquetout, PK 20, Guyane. Habitus and female genital tract glued to card, dorsal aspect, ABL = 13.2 mm.

Figure 4. Guyanemorpha spectabilis sp. n., male paratype, ADP 132103; Risquetout, PK 20, Guyane. Male genitalia, median lobe and parameres labeled as in repose in male A ventral aspect B right lateral aspect C left lateral aspect D dorsal aspect.

Figure 2 - 3. 2 Guyanemorpha spectabilis sp. n., female holotype, ADP 132101; Risquetout, PK 20, Guyane. Head, dorsal planar aspect 3 Guyanemorpha spectabilis sp. n., female paratype, ADP 132105; Nouragues, Saut Parare, Guyane. Left flight wing, dorsal aspect.