Zapotecanillus montanus, 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 : 67-69

Zapotecanillus montanus sp. n. Figs 29, 48-50, 65, 77, 90, 94

Type material.

HOLOTYPE, male, in CMNH, point-mounted, labeled: \ MEXICO, Oaxaca, 52miles N of Oaxaca, Ber.202, sink litter, 17 May 1971 S.B.Peck collector\ CMNH \. PARATYPES (14 ex., 3♂4♀ were dissected), 6 ex. labeled same as a holotype; one female labeled: \ MEX. Oax., 52mi. N Oaxaca, 9500' 17.V.71 S.Peck Ber.202, leaf lit.\ Anillinus (handwriting)\; 7 ex. labeled: \MEXICO: Oaxaca, 52miles N Oaxaca, 9500 ft., 25 May 1971, ex. litter in sinkhole, S.Peck\ THOMAS C. BARR COLLECTION 2011 Acc. No. 38014\ (deposited in CAS, CMNH).

Specific epithet.

The specific epithet is a Latin adjective from mons (= mountain), in the masculine form, meaning mountain-dwelling, and refers to the altitudinal data of the species locality.

Type locality.

Mexico, Oaxaca, 52 miles N of Oaxaca.

Recognition. Males of this new species are distinguished from those of other species of the genus by the combination of elongate habitus and shape of the median lobe (Fig. 48).

Description.

Size. Medium-sized for genus (SBL range 1.29-1.40 mm, mean 1.35 ± 0.037 mm, n=7).

Habitus. Body form (Fig. 29) slightly convex, moderately elongate (WE/SBL 0.40 ± 0.10), head of normal proportions for genus (WH/WPm 0.75 ± 0.041), pronotum narrow compared to elytra (WPm/WE 0.70 ± 0.012).

Color. Body monocolorous, rufotestaceous, appendages testaceous.

Microsculpture. Partially effaced on disc of pronotum.

Prothorax. Pronotum relatively short (LP/LE 0.38 ± 0.009) and moderately transverse (WPm/LP 1.26 ± 0.028), with margins rectilinear and markedly constricted posteriorly (WPm/WPp 1.40 ± 0.028). Basal margin oblique laterally. Contour of posterior angles obtuse (115-125°) with 1-2 small denticles in front of the angles.

Elytra. Convex, not depressed along suture, of moderate width (WE/LE 0.69 ± 0.016). Margins subparallel at middle, slightly divergent in basal third, evenly rounded to apex in apical third, maximal width of elytra at midpoint.

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

Male genitalia. Median lobe of aedeagus (Fig. 48) with slightly elongate apex, angulately rounded at tip. Dorsal plate 1 short, pointed apically and basally. Dorsal plate 2 joined to plate 1 at its middle ventrally, where it forms a distinct protuberance. Ventral sclerites with pronounced sclerotization ventrally. Right paramere short and moderately wide (Fig. 50). Left paramere without apical constriction (Fig. 49). Ring sclerite with handle conically rounded apically (Fig. 65).

Female genitalia. Spermatheca standard for genus.

Geographical distribution.

The species is known only from the type locality in the Sierra Juárez Range, a part of the Sierra Madre de Oaxaca (Figs 77 and 94, white quadrangle).

Way of life.

Specimens of this species were collected at 2900-3000m, which is the highest locality known among the Zapotecanillus species. The collection site was located in a limestone area with sinkholes and karst topography, covered with a pine-oak forest. Soil temperature at the time of collection was 48°F (S.Peck, pers. comm.).

Relationships.

Externally, adults of Zapotecanillus montanus are similar to those of Zapotecanillus kavanaughi , Zapotecanillus iviei and Zapotecanillus pecki , but males of Zapotecanillus montanus may be distinguished from those of the other species by the shape of the median lobe (Fig. 48). See also Fig. 90 for cladistic affinities.