Tylodinus buchanani 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 : 23

7. Tylodinus buchanani Luna-Cozar , sp. nov.

( Figures 40–41 , 133 )

Diagnosis. Length female, 3.7 mm. Width female, 1.9 mm. Head clothed with yellow scales; vertex with dense to contiguous scales, mostly white with yellow scales intermixed, yellow coloration dominant toward lateral side, uniformly distributed along on vertex; frons concave; rostrum with the apical area punctuate. Pronotum in lateral view strongly convex, disc clothed with yellow and dark brown scales, surface with small punctures. Elytra with basal margin slightly sinuate; tubercles distribution as follows: tubercle on I 2 in front of declivity, I3 with two tubercles: the first tubercle subbasal and second tubercle on middle of elytra, I4 with two tubercles: the first very small, positioned between tubercles on I3, and the second tubercle at declivity as long as tubercle on I2, I5 with two tubercles similar in shape and size as tubercles on I3, I6 with a very small tubercle in front of declivity, I7 with two small tubercles at same position as tubercles on I5; surface granulate, stria 10 incomplete. Metasternum moderately concave; metasternal tooth present. Male unknown. Female abdomen with ventrite 2 squamous. Femora length almost reaching elytral ápex, tibiae subparallel, slightly sinuate. Genitalia with apex of tergite eight invaginate, sternite eight missing, spermatheca shallowly convex, ramus and nodulus indistinct.

Geographic distribution. México (Chiapas).

Habitat and elevation. The holotype was collected from leaf litter in high elevation cloud forest at 1950 m.

Derivation of specific name. Patronym, named after L. L. Buchanan ( U.S.A.), a well-known worker on weevils.

Material examined. Total 1 female. Holotype female ( CMNC): México: Chiapas, Unión Juárez, Volcán Tacaná , lower slopes, ca 4 km N, Unión Juarez , elev. 1950 m (15°5'47.29''N, 92°5'17.04''W), 18.ix.1992, coll. R. S. Anderson (92–109).

Figures

FIGURES 36–43. Dorsal and lateral habitus: 36–37. Tylodinus pseudocavicrus, 38–39. Tylodinus rugosus. 40–41. Tylodinus buchanani. 42–43. Tylodinus exiguus.

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.