Tylodinus gibbosus 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 : 54

34. Tylodinus gibbosus Luna-Cozar , sp. nov.

( Figures 92–93 , 127 , 133 )

Diagnosis. Length male 2.6 mm. Width male 1.3 mm. As for T. immundus with following exceptions: body 1.9.x longer than wide; densely clothed with whitish to gray scales. Frons moderately concave, rostrum moderately carinate, punctures shallow. Pronotum in lateral view moderately convex, outline with anterior constriction, without posterior constriction ( Figure 10 ); disc somewhat hollowed, surface with small, dense punctures. Elytra strongly convex, basal margin slightly sinuate, punctures small, shallow, without granules, stria 10 incomplete, with dense patch on intervals 1–3 and intervals 1–5 at base of elytral declivity. Metasternum moderately concave. Ventrite 2 glabrous in median section. Hind femur extending beyond the apex elytral. Male genitalia ( Figure 127 ) with median lobe in lateral view moderately stout; in ventral view with lateral sides straight, subparallel; apical process in lateral view almost as long as length of median lobe, slightly curved. Female unknown.

Geographic distribution. México (Chiapas).

Habitat and elevation. The holotype was collected from leaf litter in cloud forest at 1750 m.

Derivation of specific name. Name from the Latin gibbosus derived from Latin word gibbus = hump, hunchback

Material examined. Total 1 male. Holotype male ( CMNC): México: Chiapas, Pueblo Nuevo Solistahuacán, Yerbabuena Reserve , elev. 1750 m (17°11'.24''N, 92°53'52.44''W), 19.ix.1991, coll. R. S. Anderson.

Figures

FIGURES 92–99. 92–99. Dorsal and lateral habitus: 92–93. Tylodinus gibbosus, 94–95. Tylodinus kissingeri, 96–97. Tylodinus pinguis. 98. Median lobe apex of: a) Tylodinus elongatus, b) Tylodinus exiguus, c) Tylodinus pseudocavicrus, d) Tylodinus rufus, e) Tylodinus rufus (squashed), 99. Tylodinus zilchi, ventral and lateral habitus of median lobe.

FIGURES 120–129. Ventral and lateral habitus of median lobe: 120. Tylodinus dominicus, 121. Tylodinus noctis, 122. Tylodinus kuscheli, 123. Tylodinus pappi, 124. Tylodinus branstetteri, 125. Tylodinus immundus, 126. Tylodinus intzin, 127. Tylodinus gibbosus, 128. Tylodinus kissingeri, 129. Tylodinus pinguis.

FIGURES 132–133. Maps showing collecting sites. 132. Occurrences in Chiapas, México of: Tylodinus intzin, Tylodinus variabilis, Tylodinus exiguus, Tylodinus mutabilis, Tylodinus wibmeri, Tylodinus elongatus; 133. Occurrences in Chiapas, México of: Tylodinus leoncortesi, Tylodinus buchanani, Tylodinus pusillus, Tylodinus gibbosus, Tylodinus kissingeri, Tylodinus parvus.

FIGURES 1–11. 1–5. Dorsal outline: 1. Generalized Tylodinus, indicating terminology used in this study. Key: letters indicate areas of pronotum. A, anterior area; B, median area; C, posterior area; a, anterior of lateral area; b, median section of lateral area; c, median section of dorsal area; d, anterior section of dorsal area; e, posterior section of lateral area; f, posterior section of dorsal area. 2. Tylodinus variabilis, note elytra basal margin straight. 3. Tylodinus ixchel, note elytra basal margin slightly sinuate. 4. Tylodinus immundus, note elytral basal margin sinuate. 5. Tylodinus elongatus, note elytra basal margin very sinuate. 6–11. Lateral outline: 6. Tylodinus complicatus, male, note ventrites 3–5 in same plane as ventrites 1–2. 7. Tylodinus variabilis, male, note ventrites 3–5 not in same plane as ventrites 1–2. 8. Tylodinus coapillensis, female, note ventrites 1–2 strongly convex, ventrites 3–5 not in same plane as ventrites 1–2. 9. Tylodinus zilchi (schematic). 10. Tylodinus sepulturaensis (schematic) 11. Tylodinus rugosus (schematic).