Tylodinus coapillensis, Luna-Cozar & Anderson & Jones & León-Cortés, 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 : 28

publication ID

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

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scientific name

Tylodinus coapillensis


Tylodinus coapillensis species group

Recognition. Species of this species group are distinguished by the following combination of characters: body size 3.0 mm or less, black, clothed with white scales widely scattered over body, denser along lateral sides of pronotal disc, and on vertices of tubercles of elytral declivity.

Diagnosis. Body black, approximately 2.2x longer than wide. Head with brown or dark brown scales, vertex with white scales or scales similar in coloration and tonality to head scales, dense to contiguous or overlapping, distributed along vertex or in a patch on middle of vertex; frons concave or moderately concave; rostrum moderately robust, surface with large, deep punctures, longer than or similar to punctures on head, carinate or moderately carinate, apical area punctuate, eyes moderately convex or flush with outline of head. Pronotum in lateral view moderately convex, outline with anterior constriction, 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 the middle ( Figure 14 View FIGURES 12–19. 12 ), somewhat hollowed longitudinally; punctures contiguous or dense on lateral sides, progressively more widely spaced, smaller and shallower towards median section, less conspicuous towards anterior and posterior sections ( Figure 15 View FIGURES 12–19. 12 ); whitish, moderately dense scales 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 scales on middle and posterior areas of disc; surface without granules. Elytra black, with basal margin slightly sinuate ( Figure 3 View FIGURES 1–11. 1–5 ), with dense whitish scales subbasally and on tubercles at elytral declivity and widely scattered on middle of elytra, with patch of white scales on tubercles in front of elytra declivity or not; striae 10 absent. Metasternum flat or moderately concave, median section glabrous; metasternal tooth absent. Abdomen with ventrite 2 glabrous or with transverse line of scales, flat or convex along median line. Hind femur length not reaching elytra apex, femora armed, tibiae subparallel or wider towards base, premucro absent. Female with tergite eight trapezoidal, apex slightly curved, sternite eight doliform, apex not constricted, median membranous area 2/3 as long as basal plate length, spermatheca very shallowly curved, with the outer margin not convex, ramus and nodulus indistinct.

Key to species of Tylodinus coapillensis species group

1 Vertex with two small patches of white scales; interval 2 at elytral declivity with a small spine-shaped tubercle ( Figures 18 View FIGURES 12–19. 12 , 52–53 View FIGURES 52–59 )......................................................................... T. coapillensis Luna-Cozar

- Vertex with dark brown scales; tubercle on interval 2 at elytral declivity low and rounded, not spine shaped ( Figures 54–55 View FIGURES 52–59 ).................................................................................. T. leoncortesi Luna-Cozar













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