Tylodinus immundus Luna-Cozar, 2014

Luna-Cozar, Jesús, Anderson, Robert S., Jones, Robert W. & León-Cortés, Jorge L., 2014, A taxonomic monograph of the genus Tylodinus Champion (Coleoptera: Curculionidae: Cryptorhynchinae: Tylodina) of Chiapas, Mexico, Zootaxa 3788 (1), pp. 1-63 : 52-53

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https://doi.org/ 10.11646/zootaxa.3788.1

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scientific name

Tylodinus immundus Luna-Cozar

sp. nov.

32. Tylodinus immundus Luna-Cozar , sp. nov.

( Figures 88–89 View FIGURES 84–91 , 125 View FIGURES 120–129 , 131 View FIGURES 130–131 )

Diagnosis. Length male 2.5–3.3 mm, female, 2.9–3.2 mm. Width male 1.2–1.7 mm, female, 1.4–1.6 mm. Body 2.1x longer than wide, black. Head clothed with yellow scales, punctures similar to those of rostrum; vertex with dense to contiguous scales, uniformly distributed along vertex, similar in color and tonality as scales on head; frons moderately concave; rostrum moderately robust, surface moderately carinate, apical area puncticulate. Pronotum in lateral view strongly convex, outline with anterior and posterior constriction ( Figure 11 View FIGURES 1–11. 1–5 , 89 View FIGURES 84–91 ), in dorsal view with sides slightly divergent from base to midlength, then convergent to apex, constricted beyond middle; disc longitudinally hollowed, punctures dense to contiguous at base and progressively more widely spaced, smaller and shallower towards apex; disc clothed with yellow scales, very dense on lateral sides and flanks, anterior area forming thick longitudinal fringe along middle and narrow strip that diverges from middle base to flanks, and with dark brown or black scales on middle and posterior areas of disc ( Figures 14 View FIGURES 12–19. 12 , 88 View FIGURES 84–91 ), surface with small punctures and without granules. Elytra black, sometimes with dark red coloration along interval 1–2, basal margin sinuate ( Figure 4 View FIGURES 1–11. 1–5 ), surface granulate; tubercle distribution as follows: I2 with small round tubercle on elytral declivity base, I3 with two tubercles, first tubercle subbasal, second on middle of elytral declivity, I4 with two small tubercles, first between tubercles on I3, second on base of elytral declivity and same size as tubercle on I2, I5 with two small tubercles in same position as tubercles on I3, I6 with very small tubercle between tubercles on I5, tubercles on I3 longer than other tubercles. Metasternum flat, glabrous, metasternal tooth absent. Male abdomen with ventrites 3–5 not in same plane as 1–2, ventrite 1 weakly concave, with scattered scales, ventrite 2 as long as 3–4, feebly concave, completely squamous, ventrite 5 as long as ventrite 5, convex at middle, with an anterior impression. Femora armed, hind femur reaching elytral apex, middle and hind tibiae subparallel, premucro absent. Male genitalia ( Figure 125 View FIGURES 120–129 ) with median lobe in lateral view weakly curved, very slender; in ventral view as long as apodemes, lateral sides convex beyond 0.27 length from base, convergent, apex acute; apical process in lateral view moderately large (0.26–0.34 as long as median lobe body), sinuate, moderately curved downward; in ventral view constricted beyond median orifice, lateral sides convergent. Female with sternite eight doliform, apex not constricted, median membranous area as long as the basal plate, ramus short, slender, nodulus slender.

Geographic distribution. México (Chiapas).

Habitat and elevation. Specimens were collected from leaf litter in high elevation cloud forest between 2400–2760 m.

Derivation of specific name. Name derived from the Latin word immudus = dirty, filthy, slovenly.

Material examined. Total 7 males, 12 females. Holotype male: ( CMNC): México: Chiapas, San Cristóbal de las Casas Cerro Huitepec , ca. 5 km W San Cristóbal, elev. 2650 m (92° 41'38.4"W, 16° 44'33"N), 17.ix.1991. R GoogleMaps . Anderson, 91–106. Paratypes: México: Chiapas, San Cristóbal de las Casas, Cerro Huitepec (pico) 5 km W San Cristóbal, elev. 2750 m (16°44'33''N, 92°41'38.4''W), 15.ix.1991, coll. R GoogleMaps . S. Anderson — 1 males 1 female ( CMNC); same locality, 18.ix.1991, coll. R GoogleMaps . S. Anderson — 1 male ( CMNC); Cerro Huitepec ca. 5 km W San Cristóbal, elev. 2760 m (16°44'33''N, 92°41'38.4''W), 14.ix.1992, coll. R GoogleMaps . S. Anderson — 1 male, 2 females ( CMNC); same locality, elev. 2650 m, 17.ix.1991, coll. R GoogleMaps . S. Anderson — 2 males, 8 females ( BMNH, CMNC, CWOB, ECOS); same locality, 14–25.ix.1992 — 1 female ( CMNC); Reserva Huitepec , elev. 2400 m (16°44'47.76''N, 16°45'0''E), 11.viii.2007, coll. R GoogleMaps . S. Anderson — 1 male ( CMNC) .


Departamento de Geologia, Universidad de Chile













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