Zapotecanillus pecki, Sokolov, Igor M., 2013

Sokolov, Igor M., 2013, A new genus and eight new species of the subtribe Anillina (Carabidae, Trechinae, Bembidiini) from Mexico, with a cladistic analysis and some notes on the evolution of the genus, ZooKeys 352, pp. 51-92 : 70-72

Zapotecanillus pecki sp. n. Figs 30, 35, 51-53, 64, 77, 90, 94

Type material.

HOLOTYPE, male, in CMNH, point-mounted, labeled: \ MEXICO, Oaxaca, 3.5miles S of Suchixtepec,\ Ber.208, leaf litter, 3 June 1971 S.B. Peck collector\ CMNH\. PARATYPES (16 ex., 4♂2♀ were dissected), 6 ex. labeled same as a holotype; 6 ex. labeled: \ MEXICO, Oaxaca, 13 mi. N of Suchixtepec, 9500ft., ex. leaf litter, 4 June 1971, S. Peck\ THOMAS C. BARR COLLECTION 2011 Acc. No. 38014\; 4 ex. labeled: MEXICO, Oaxaca, 13.5 mi. S of Suchixtepec, 8000ft., ex. leaf litter, 3 June 1971, S. Peck\ THOMAS C. BARR COLLECTION 2011 Acc. No. 38014\ (deposited in CAS, CMNH).

Specific epithet.

The specific epithet is a Latinized eponym in the genitive case, and is based on the surname of Stewart B. Peck, Professor in the Biology Department of Carleton University, Ottawa, Canada, the collector of the type series of this species.

Type locality.

Mexico, Oaxaca, 3.5miles S of Suchixtepec.

Recognition.

Males of this new species are distinguished from those of other species of the genus by the shape of the median lobe (Fig. 51).

Description.

Size. Medium-sized for genus (SBL range 1.32-1.38 mm, mean 1.35 ± 0.026 mm, n=5).

Habitus. Body form (Fig. 30) slightly convex, moderately elongate (WE/SBL 0.41 ± 0.08), head of normal proportions for genus (WH/WPm 0.73 ± 0.011), pronotum narrow compared to elytra (WPm/WE 0.72 ± 0.009).

Color. Body monocolorous, rufotestaceous, appendages testaceous.

Microsculpture. Microlines partially effaced on disc of pronotum.

Prothorax. Pronotum (Fig. 35) relatively short (LP/LE 0.41 ± 0.012) and slightly transverse (WPm/LP 1.24 ± 0.030), with margins slightly sinuate and distinctly constricted posteriorly (WPm/WPp 1.36 ± 0.043). Basal margin bisinuate near posterior angles. Contour of posterior angles slightly obtuse (108-118°) with 1-2 small denticles in front of the angles.

Elytra. Slightly convex, not depressed along suture, of moderate width (WE/LE 0.70 ± 0.022). Margins subparallel at middle, slightly divergent in basal half, evenly rounded to apex in apical half, maximal width of elytra at midpoint.

Legs. 1st male protarsomere markedly dilated apico-laterally.

Male genitalia. Median lobe of aedeagus (Fig. 51), with elongate apex, rounded at tip. Dorsal plate 1 long, pointed apically and basally. Dorsal plate 2 joined to plate 1 at its apical third, where it forms a pronounced biapical protuberance. Ventral sclerite faintly sclerotized, barely visible. Right paramere rather long and moderately wide, with additional (3rd) seta dorsally (Fig. 53). Left paramere without apical constriction (Fig. 52). Ring sclerite with short handle, widely rounded apically (Fig. 64).

Female genitalia. Spermatheca standard for genus.

Geographical distribution.

The species is known only from the type locality in the Sierra Madre del Sur, in the surroundings of Suchixtepec (Figs 77 and 94, black flower).

Way of life.

Members of this species live at elevations of 8000-9500' (2440-2900 m). At 8000' (= 2440 m), beetles were collected in mixed pine-oak forest with Alnus , Carpinus , etc, and soil temperature at the time of collection was 56°F (S. B. Peck, pers. comm.).

Relationships.

Males of this species are easily distinguished from those of other members of the genus by the structure of the median lobe (Fig. 51) and setation of the right paramere (Fig. 53); and the geographical distribution of this species sets it apart from all its congeners. See also Fig. 90 for cladistic affinities.