Tylodinus elongatus 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 : 43

publication ID

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

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scientific name

Tylodinus elongatus Luna-Cozar

sp. nov.

24. Tylodinus elongatus Luna-Cozar , sp. nov.

( Figures 5 View FIGURES 1–11. 1–5 , 19 View FIGURES 12–19. 12 , 22 View FIGURES 20–27. 20–21 , 72-73 View FIGURES 68–75 , 98a View FIGURES 92–99. 92–99 , 117 View FIGURES 110–119 , 132 View FIGURES 132–133 )

Diagnosis. Length male, 10.0- 10.1 mm, female, 10.0 mm. Width male, 3.4-3.5 mm, female 3.5 mm. Body approximately 2.7x longer than wide, black. Head with dark brown scales; vertex with patch of yellow scales on middle, scales overlapping; frons moderately concave; rostrum moderately robust, moderately carinate, apical area puncticulate; eyes convex. Pronotum in lateral view strongly convex, outline with anterior constriction and without posterior constriction ( Figure 10 View FIGURES 1–11. 1–5 ); in dorsal view with sides slightly divergent from base to midlength, then convergent to apex, constricted beyond middle; disc a longitudinal impression; surface with dense and deep punctures on flanks, becoming smaller and scattered towards middle, with yellow to light brown scales, very dense on lateral area and flanks, anterior area forming thick longitudinal fringe along middle and narrow strip that diverges from middle base to flanks, and with dark scales on middle and posterior areas of disc ( Figure 14 View FIGURES 12–19. 12 ); surface without granules. Elytra with basal margin strongly sinuate ( Figure 5 View FIGURES 1–11. 1–5 ), surface with shallow punctures, small and sparse; intervals more convex as follows: I3 at declivity near the apex, I7 at middle of elytra near the tubercle in this interval, I8 at middle of elytra and I9 at apical 2/3; tubercle distribution as follows: tubercle on I 2 in front of the declivity, I3 with two tubercles, first tubercle sub basal and second tubercle on middle of elytra, I4 with tubercle at base of elytra, smaller than tubercle on I2, I5 with two tubercles in same position as tubercles on I3 but smaller in size, I6 with swelling on declivity, I7 with callous on humerus and subbasal tubercle, I9 with subbasal swelling. Metasternum moderately concave, median section glabrous, metasternal tooth present ( Figure 19 View FIGURES 12–19. 12 ). Abdomen very large, longer than length from head to metasternum on anterior area, male with ventrite 1 moderately concave, glabrous in median section; ventrite 2 as long as 3-4 combined, convex, glabrous in median section; ventrite 5 longer than 1, convex in middle area, almost glabrous, scales dense on ventrite 5, female with two acute projections at apex ( Figure 22 View FIGURES 20–27. 20–21 ). Legs very elongate, clothed with dark brown scales, light brown on apical 1/3 on dorsal area and along inside of femora, with patch of light brown to yellow scales on femoral tooth, hind femur almost reaching elytral apex, front tibia subparallel, excavated on apical ½ on internal margin, middle and hind tibiae subparallel, internal margin slightly sinuate, premucro absent. Male genitalia ( Figure 98a View FIGURES 92–99. 92–99 , 117 View FIGURES 110–119 ) with median lobe in lateral view weakly curved, very slender; in ventral view longer than apodemes, lateral sides straight, convergent, apex blunt; apical process in lateral view moderately large (0.26-0.34 as long as median lobe), moderately curved downward and then abruptly curved upward ( Figure 117 View FIGURES 110–119 ); in ventral view constricted beyond median orifice, lateral sides subparallel Female genitalia with tergite eight trapezoidal, apex slightly curved, apical margin smooth; sternite eight doliform, with apex not constricted, length of median membranous area 1/3 as long as basal plate, spermatheca very shallowly curved, outer margin of the corpus convex, ramus and nodulus indistinct.

Comments. This species resembles members of the T. spiniventris species group but is distinguished by having a very elongate body, abdomen longer than the length from head to metasternum.

Geographic distribution. México (Chiapas).

Habitat and elevation. The three specimens of this odd species were collected on dead tree limbs at night; they were observed to run rapidly along the branches. The habitat was a high elevation cloud forest between 2000- 2100 m.

Derivation of specific name. Name derived from the Latin word elongates = prolong, protract.

Material examined. Total 2 males, 1 female. Holotype male ( CMNC): México: Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1, elev. 2050 m (15°39'25.56''N, 92°48'32.4''W), 16-21.xi.2002, coll. R GoogleMaps . S. Anderson. Paratype: México: Chiapas, Ángel Albino Corzo , El Triunfo Polygono #1, elev. 2100 m (15°39.33'N, 92°48.44'W), 18.xi.2001, coll. R GoogleMaps . Jones — 1 female ( UAQM); Reserva El Triunfo, Polígono 1, elev. 2050 m (15°39'25.56''N, 92°48'32.4''W), 16-21.xi.2002, coll. R GoogleMaps . S. Anderson — 1 male ( CMNC) .


Departamento de Geologia, Universidad de Chile













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