Gymnetina grossepunctata Ratcliffe and Warner, 2011

Ratcliffe, Brett C. & Warner, William B., 2011, A revision of the genus Gymnetina Casey, 1915 (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini), Insecta Mundi 2011 (173), pp. 1-28 : 13-14

Gymnetina grossepunctata Ratcliffe and Warner , new species

( Fig. 20-24 , 32 )

Type Material. Holotype male, labeled: “ GUATEMALA, Sacatepéquez, Jocotenango , ± 1500 m, 23 iii 1997, 14 o 34.71 n 090 o 44.79w, Col. J. Monzón, COLECCION JOSE MONZON” and with our red holotype label . Allotype female, labeled “ GUATEMALA, Sacatepéquez, Jocotenango , 1,545 m. 25 de ENERO 1998, 14.578957 -90.746540, Col. José Monzón Sierra, COLECCIÓN J. MONZON” and with our red allotype label .

Paratypes labeled “ GUATEMALA Guate., Mixco. Club La Montaña. 6 IV 1996, Col. K. E. Villatoro” (1 female) and “ GUATEMALA, St. Rosa, Cuilapa, 4 II 1991, P. Fernandez” (1 female). Paratypes with our yellow paratype label.

Holotype (ex BCRC) deposited at UNSM . Allotype deposited at JMSC. Both paratypes deposited at UVGC .

Holotype. Male. Length 24.6 mm; width across humeri 13.5 mm. Color black, shiny ( Fig. 20 ). Sternites 1-4 each with short, slender, cretaceous bands on posterolateral margin ( Fig. 21 ). Head: Lateral margins elevated. Surface densely punctate; punctures moderate to large, setigerous from between eyes to apex of clypeus; setae moderate in density, short, black. Occiput smooth, shiny. Frons with weak, short, smooth, longitudinal swelling. Clypeus with apex broadly rounded, strongly reflexed, sides constricted just before antennal insertion. Interocular width equals 4.0 transverse eye diameters. Antenna with 10 segments, club slightly longer than antennomeres 1-7. Pronotum: Surface densely punctate (except for basomedian lobe which has a few, sparse punctures); punctures moderate to mostly large, mostly coalescing on either side of middle. Mesepimeron dorsally with punctures moderate in size and density, setigerous; setae short, black. Elytra: Surface coarsely, densely punctate (except behind basomedian lobe where punctures sparse); punctures large to mostly very large, mostly coalescing; sides near lateral margins and apical angles rugopunctate. Apical umbone pronounced. Apices weakly, subacutely produced. Pygidium: Surface concentrically rugulopunctate, setigerous; setae dense, short, black. In lateral view, surface weakly convex. Venter: Setae black. Mesometasternal process flat on ventral surface, apex broadly rounded, anterior face oblique at about 45 o to longitudinal axis of body. Abdominal sternites on lateral margins with punctures moderate in size and density, elsewhere sparsely punctate. Legs: Protibia slender, presumably tridentate but basal and median teeth indicated by a swelling only. Parameres: In ventral view, entire base of each paramere heavily sclerotized, basally projecting ( Fig. 24 ).

Allotype. Female ( Fig. 22 ). Length 26.0 mm; width across humeri 14.0 mm. The female allotype does not differ significantly from the male holotype except that the protibia is distinctly tridentate.

Variation. Female (2 paratypes). Length 23.0-24.0 mm; width 12.5-13.0 mm. The paratypes do not significantly differ from the allotype. The cretaceous markings on the abdominal sternites are obscured in one specimen due to a build up of body oils.

Etymology. This species is distinctive because of the coarse punctation of the pronotum and elytra, and so it is named to reflect this. From the Latin punctura, meaning a puncture, and the Latin grossus, meaning large or coarse.

Distribution ( Fig. 32 ). Gymnetina grossepunctata occurs in Guatemala. 4 specimens examined from BCRC (donated to UNSM), JMSC, UVGC.

GUATEMALA (4): GUATEMALA (1): Mixco. SACATEPEQUEZ (2): Jocotenango. SANTA ROSA (1): Cuilapa.

Temporal Distribution. January (1), February (1), March (1), April (1).

Diagnosis. Gymnetina grossepunctata is immediately recognizable by its coarse punctation on the pronotum and elytra, more rounded clypeal apex, cretaceous marks only on abdominal sternites 1-4, and the heavily sclerotized venter of the parameres ( Fig. 24 ).

Biology. Nothing is known of the biology of this rare species.

Figures

Figure 32. Distribution map for Gymnetina species.

Figures 20-24. Gymnetina grossepunctata: 20-21) Holotype, dorsal and ventral views, respectively. 22) Dorsal and oblique view of allotype (image courtesy of J. Monzón). 23-24) Dorsal and ventral views, respectively, of parameres.