Geocharidius longinoi, Sokolov, Igor M. & Kavanaugh, David H., 2014

Sokolov, Igor M. & Kavanaugh, David H., 2014, The integripennis species group of Geocharidius Jeannel, 1963 (Carabidae, Bembidiini, Anillina) from Nuclear Central America: a taxonomic review with notes about biogeography and speciation, ZooKeys 443, pp. 61-118 : 79

Taxon classification Animalia Coleoptera Carabidae

Geocharidius longinoi sp. n. Figs 5E, 7C, G, 12C, 13 R–T, 16F, 17F, 22

Type material.

HOLOTYPE, a male, in KUNHM, point-mounted, labeled: \ GUATEMALA: El Progreso: Cerro Pinalón, 15.08392-89.93013 ± 55m, 2750m, 1-V-2009 ex. sifted leaf litter, cloud forest, LLAMA09 Wm-B-01-1-04 \ KUNHM \ HOLOTYPE Geocharidius longinoi Sokolov and Kavanaugh 2014 [red label] \. PARATYPES: A total of 13 specimens (2 males and 1 female were dissected), deposited in CAS, CMNC and KUNHM; 5 specimens labeled same as holotype; 7 specimens labeled: \ GUATEMALA: El Progreso: Cerro Pinalón, 15.08411-89.93239 ± 57m, 2715m, 1-V-2009 ex. sifted leaf litter, cloud forest, LLAMA09 Wm-B-01-1-05 \ KUNHM \; 1 specimen labeled: \ GUAT.: EL PROGRESO: 19.6km.N.Estancia de la Virgen, 2000m, Finca la Illuciones, 24.VI.1993, R.Anderson, cloud for. litter, 93-13C \ CMNC \.

Type locality.

Guatemala, El Progreso Department, Cerro Pinalón.

Etymology.

The specific epithet is a Latinized eponym in the genitive case, and is based on the surname of John T. (Jack) Longino, Professor of the Biology Department of the University of Utah, and one of Co-PI’s of the LLAMA project, which provided the material on which the description of this species is based.

Recognition.

Adults of this new species are distinguished from those of other members of the integripennis species group by the large size, distinctive shape of the pronotum with very wide basal margin, and the proepisternum with evident microsculpture. Males and females of Geocharidius longinoi are distinguished from those of other members of the integripennis species group by the structure of the median lobe and the shape of spermatheca, respectively.

Description.

Size. Medium to large for genus (SBL range 1.34-1.51 mm, mean 1.41 ± 0.071mm, n=12).

Habitus. Body form (Fig. 12C) moderately convex, elongate ovoid, general proportions (WE/SBL 0.38 ± 0.008) and proportions of head (WH/WPm 0.71 ± 0.012) average for group, pronotum markedly wide compared to elytra (WPm/WE 0.80 ± 0.013).

Color. Body brunneorufous, appendages testaceous.

Microsculpture. Mesh pattern of irregularly isodiametric sculpticells present over all dorsal surfaces of head and elytra. Pronotum smooth (without evident microsculpture). Proepisternum with evident microsculpture.

Mouthparts. Maxillae and labium (Fig. 5E).

Prothorax. Pronotum slightly transverse (WPm/LP 1.25 ± 0.019), with lateral margins slightly constricted posteriorly (WPm/WPp 1.29 ± 0.018). Posterior angles slightly obtuse (100-110°). Width between posterior angles greater than between anterior angles (WPa/WPp 0.94 ± 0.020).

Elytra. Moderately convex, slightly depressed along suture, moderately wide (WE/LE 0.66 ± 0.020), without traces of striae. Humeri rounded, in outline forming right angle with longitudinal axis of body. Lateral margins convex, evenly divergent at basal forth, evenly rounded to apex in apical third.

Legs. Mesotibia (Fig. 7C). Metatibia (Fig. 7G).

Male genitalia. Median lobe (Fig. 13R) with shaft long, apically slightly widened, apex small and narrowly rounded. Ventral margin straight. Dorsal sclerites of internal sac (Fig. 13R) in form of long waved ribbon, tapered apically and slightly dilated basally, where sclerite forms small hook-like extension. Right paramere with short apical constriction (Fig. 13T). Left paramere with rather short and narrow apical constriction (Fig. 13S). Ring sclerite with triangularly rounded handle (Fig. 16F).

Female internal genitalia. Spermatheca sclerotized, elongate, subparallel, almost straight, with long cornu and short nodulus (Fig. 17F). Length of spermathecal gland less than length of spermatheca. Spermathecal duct not coiled.

Geographical distribution.

This species is known only from Cerro Pinalón, part of the Sierra de las Minas range of Guatemala (Fig. 22, green squares).

Way of life.

Specimens were extracted from cloud forest litter at elevations of 2000-2750 m.

Relationships.

The shape of handle of the ring sclerite (Fig. 16F) and the structure of dorsal sclerites of the internal sac (Fig. 13R) suggest a relationship with the Honduran Geocharidius celaquensis (Figs 20B and 19E), described below.