Tylodinus intzin 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 : 53

33. Tylodinus intzin Luna-Cozar , sp. nov.

( Figures 90–91 , 126 , 132 )

Diagnosis. Length male 2.4–2.5 mm, female, 2.3–2.9 mm. Width male 1.3–1.4 mm, female, 1.4–1.6 mm. As for T. immundus with the following exceptions: body approximately 2.0x longer than wide. Head with scale patches on middle and lateral sides on vertex; frons concave, rostrum carinate. Pronotum in lateral view feebly convex, outline with anterior constriction, without posterior constriction ( Figure 10 , 90 ); disc somewhat hollowed. Elytra sometimes with dark red coloration on intervals 1–4 on elytral declivity, surface granulate, basal margin slightly sinuate; tubercles absent on I2; with dense patch of scales on intervals 1–3 and intervals 1–5 at base of elytral declivity. Metasternum moderately concave. Abdomen with ventrite 1 slightly convex, glabrous at median section, ventrite 2 glabrous at median section, ventrite 5 as long as ventrite 1, flat. Middle and hind tibiae wider basally. Male genitalia ( Figure 126 ) with median lobe in lateral view stout, in ventral view longer than 1/2 length of apodemes (0.6 to 0.8), lateral sides straight, divergent from the base to the apex, apex acute; apical process in lateral view very large (0.45–0.55 as long as median lobe body), slightly curved; in ventral view not constricted beyond median orifice. Female with sternite eight trapezoidal, apex not constricted, membranous area as long as the basal plate, spermatheca shallowly curved, ramus and nodulus indistinct.

Geographic distribution. México (Chiapas).

Habitat and elevation. Specimens were collected from leaf litter in cloud forest between 1300–2100 m.

Derivation of specific name. Patronym, named after Manuel Girón Intzin, of Ecosur (El Colegio de Frontera Sur), San Cristobal de las Casas, México.

Material examined. Total 10 males, 4 females. Holotype male: ( CMNC): México: Chiapas, Tenejapa, Yashanal , elev. 1800 m (16°49'6.6''N, 92°26'33.72''W), 21.vii.2003, coll. R . S. Anderson. Paratypes: México: Chiapas, Bochil , 5.9 Km E. Bochil, elev. 1300 m (17°0'44.64''N, 90°46'31.8''W), 15.ix.1992, coll. R . S. Anderson — 2 males, 2 females ( CMNC, ECOS); Chalchihuitán, Cerros de Chalchihuitán , elev. 2050 m (16°59'20.76''N, 92°37'13.08''W), 24.vii.2003, coll. R . S. Anderson — 1 male ( CMNC); El Bosque , 10 km W El Bosque, elev. 1475 m (17°2'36.6''N, 92°45'43.56''W), 15.ix.1992, coll. R . S. Anderson — 1 male ( CMNC); Oxchuc, Cruz Wix, 13.vi.2006, coll. M. Girón — 1 male ( ECOS); Pueblo Nuevo Solistahuacán , Reserva la Yerbabuena , 2.1 km NW de Pueblo Nuevo, Solistahuacán, elev. 2100 m (17°11'12.12''N, 92°53'43.44''W), 23.ix.1992, coll. R . S. Anderson — 2 males ( CMNC); Rayon , 8.9 km E Rayón, elev. 1500 m (17°10'58.08''N, 92°55'47.28''W), 19.ix.1991, coll. R . S. Anderson — 1 male ( CMNC); Tenejapa, Ojo de Agua , elev. 1800 m (16°49'6.6''N, 92°26'33.72''W), 21.vii.2003, coll. R . S. Anderson — 1 male ( CMNC); Trinitaria, Parque Nacional Lagos de Montebello, a 50 mts Ote. de camino a 5 lagos, elev. 1594 m (16°6'21.88''N, 91°40'49.85''W), 22.vi.2007, coll. J. L. Cozar — 2 females ( ECOS) .

Figures

FIGURES 84–91. Dorsal and lateral habitus: 84–85. Tylodinus pappi, 86–87. Tylodinus branstetteri, 88–89. Tylodinus immundus, 90–91. Tylodinus intzin.

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).