Borboropora mixe Delgado & Santiago-Jiménez, 2009

Delgado, Leonardo & Santiago-Jiménez, Quiyari J., 2009, Two new species of Borboropora Kraatz from Mexico (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 2094, pp. 60-68 : 64-66

Borboropora mixe Delgado & Santiago-Jiménez , new species

( Figs. 11–20 )

Type material. Holotype: male, “ MÉXICO: Oaxaca, Tamazulapan, Km. 3 Carretera Santo Domingo Tepuxtepec-Juquila Mixes, 18–19.VIII.2003, bosque de encino/ Alt. 2000 m, 16° 58’ 57” N, 96° 01’ 34” W, trampa de intercepción, Q. Santiago y L. Delgado cols. ( IEXA). Paratypes (28 specimens): same data as holotype ( CC-UAEH, CZUG, FMNH, IBUNAM, KSEM, QSJC, IEXA).

Description. Body length: 3.7– 2.4 mm. Body fusiform, depressed; head, pronotum and elytra dull black, abdomen glossy brown with metallic luster, legs brown except apex of femora and tibiae, and tarsi yellowish, antennae brown, except articles 1–2 and 11 yellowish-red; surface of head, pronotum and elytra rough due to dense setiferous asperities and microsculpture, pubescence dense and fine.

Head subquadrate ( Fig. 11 ), basal angles narrowly rounded; with small impression on anterocentral region, midline scarcely impressed towards vertex. Eyes slightly shorter than length of temples. Neck about 1/ 4 as wide as the base of head. Antenna with articles 1–3 and 11 elongate, article 4 sligthly elongate, and articles 5–10 quadrate.

Labrum with 10 or fewer setae on each side of midline, most setae on anterior half; with 10 to 25 sensory pores on each side of midline; basal region of epipharynx with 4 to 5 pores on each side of midline arranged in nearly diagonal rows, and with 4 to 6 sensory pores arranged in nearly a regular transverse row; medial pore field of epipharynx with 25 to 32 pores with irregular array. Mandibles asymmetrical with velvety patch area varying from restricted to basal angle to extending to more than half of base of mandible; right mandible with one medial acute tooth, left mandible with one blunt tooth ( Fig. 12 ). Prementum with only two medial setae, separated by about two times width of setal base; medial pseudopore field absent; lateral pseudopore field composed of one setose pore and two asetose pores. Mentum not reticulated.

Pronotum inverted pear-shaped ( Fig. 13 ), distinctly narrowed behind middle, wider in anterior region; anterior angles rounded, posterior angles acute. Pronotum with a medial longitudinal narrow sulcus, and with a small impression at base of midline. Pronotal surface with dense microsetae and some macrosetae, lateral microsetae directed inward, microsetae on midline directed outward. Mesospiracular peritremes large, quadrangular ( Fig. 14 ). Each elytron longer than wide ( Fig. 15 ), with very dense, recumbent microsetae; postero-lateral margin slightly to moderately sinuate. Mesoventrite without medial carina ( Fig. 16 ); base of each mesocoxal acetabula with two pores. Mesocoxal cavities narrowly separated by meso- and metaventral processes; length of mesoventral process about 0.31 mm (from border of declivity of mesoventrite to apex of process), with apex long and rounded; length of metaventral process about 0.53 mm (from base of metaventrite to apex of mesoventral process), metaventral process not margined and continued below mesoventral process ( Fig. 16 ); isthmus lacking.

Abdomen broader at middle, with moderately dense microsetae and sparse macrosetae. Sternite IV in basal region without gland opening. Tergite VII with gland openning on anterior margin and ctenidio on apical margin. Tergite VIII rounded, convex, with comb of denticles (about 40) on apical margin. Without evident secondary dimorphism.

Aedeagus with internal sac of medial lobe with scarce spinules ( Figs. 17–18 ); medial lobe with short, well defined compressor plate; flagellum distinct and long; anterodorsal margin of paramerite with two irregular rows of sensory pores presents beneath the velar sac; hinge zone of paramerite faint, extended from dorsal surface to near articulation between condylite and paramerite; apical process of paramerite clearly articulated anterior to posterior edge of velum; condylite with irregular lines of sensory pores; velum long (more than half as long as paramere)( Fig. 19 ).

Spermatheca with basal bulb simple, rounded at base ( Fig. 20 ); tube with two distinct curves, but not arranged into distinct coils, not looking filamentous; neck short and very sclerotized.

Remarks. Borboropora mixe can be easily distinguished from the three other American species of Borboropora (including B. pseudoquadriceps ) by the color dull black (not glossy), and the roughened sculpture of head, pronotum and elytra, formed by dense asperities (not polished, with variable but ever distinct and separate punctures).

Distribution. Borboropora mixe is only known from the type locality in the Oaxaca state, Mẻxico. This locality is situated at the central-eastern portion of the Oaxaca state, a very interesting region with a mixture of different faunistic elements. The adult specimens were caught with flight intercept traps, placed at a steep area with oak forest ( Quercus spp.), at 2,000 m in elevation. Nothing is known on the immature stages.

Etymology. The species name refers to the Mexican indigenous group of people who live at the eastern highlands of Oaxaca State, where this species was collected. The name Mixe means “people who speak the mountain language”. At the same time, Mixe is probably derived from the Nahuatl language word mixtli, meaning cloud.

Figures

FIGURES 11 – 16. Details of Borboropora mixe sp. nov. 11) Head, dorsal view. 12) Mandibles, dorsal view. 13) Pronotum, dorsal view. 14) Prosternum and peritremes, ventral view. 15) Elytra, dorsal view. 16) Meso- and metaventrite, ventral view.

FIGURES 17 – 20. Genitalia of Borboropora mixe sp. nov. 17) Median lobe, lateral view. 18) Median lobe, dorsal view. 19) Paramere, lateral view. 20) Spermatheca. Scale bar 0.2 mm.