Tylodinus noctis 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 : 49

28. Tylodinus noctis Luna-Cozar , sp. nov.

( Figures 80–81 , 121 , 135 )

Diagnosis. Length male, 2.5–2.8 mm, female, 3.0 mm. Width male, 1.2–1.4 mm, female 1.6 mm. Body approximately 2.0x longer than wide, black. Head with dark brown scales; vertex with patch of yellow scales on middle of vertex, dense to contiguous; frons moderately concave; rostrum moderately robust, moderately carinate, apical area puncticulate; eyes moderately convex. Pronotum in lateral view strongly convex, outline with anterior constriction, without posterior constriction ( Figure 10 ); in dorsal view with sides slightly divergent from base to midlength, then convergent to apex, constricted beyond middle; disc with longitudinal impression; surface with dense and deep punctures on flanks, becoming smaller, scattered towards middle, with yellow to light brown scales, very dense on lateral area and flanks, anterior area forming a thick longitudinal fringe along middle and narrow strip that diverges from middle base to flanks, and with dark scales on the middle and posterior areas of disc ( Figure 14 ); surface without granules. Elytra with basal margin slightly sinuate ( Figure 3 ); tubercle distribution as follows: I2 with small, round tubercle on declivity base, I3 with two tubercles: first subbasal, second on middle of elytra, I4 with two small tubercles, first between tubercles on I3, second on declivity base, longer than tubercle on I2 (but in some specimens of equal size), I5 with two small tubercles in same position as tubercles on I3, tubercles on I3 longer than other tubercles, I6 with subbasal tubercle; surface without granules. Metasternum flat, median section glabrous; metasternal tooth absent. Male abdomen with ventrites 3–5 in same plane as ventrites 1–2, ventrite 1 weakly concave, glabrous at median section; ventrite 2 feebly concave, as long as ventrites 3–4 combined, with transverse line of scales along middle; ventrite 5 longer than ventrite 1, flat, with anterior impression. Femora armed, hind femur length reaching elytral apex, middle and hind tibiae subparallel, premucro absent. Male genitalia ( Figure 121 ) similar to that of T. rufus . Female with sternite eight trapezoidal, median membranous area ½ as long as basal plate length, spermatheca very shallowly curved.

Comments. Male genitalia in T. complicatus , T. rufus , T. noctis and T. dominicus are very similar; however, T. noctis is distinguished from its allies by body coloration

Geographic distribution. México (Chiapas).

Habitat and elevation. Specimens were collected from leaf litter in mixed cloud forest between 1500–1900 m.

Derivation of specific name. Name derived from Latin word noctis = night

Material examined. Total 7 males, 2 females. Holotype male ( CMNC): México: Chiapas, Coapilla , ca. 10.5 km NE Coapilla, elev. 1900 m (17°09.916'N, 93°08.337'W), 13.vii.2007, coll. R . S. Anderson, mixed Liquidambar, magnolia, pine forest litter 2007-010. Paratypes: México: Chiapas, ca. 10.5 km NE Coapilla , elev. 1900 m (17°9'55.08''N, 93°8'20.4''W), 13.vii.2007, coll. R . S. Anderson — 2 males, 1 female ( CMNC); 5 km NE Coapilla , elev. 1990 m (17.17575°N 93.13284°W), 25.v.2008, LLAMA (Wa-a-04-1-07) — 1 male ( 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 — 3 males, 1 female ( CMNC, ECOS) .

Figures

FIGURES 76–83. Dorsal and lateral habitus: 76–77. Tylodinus rufus, 78–79. Tylodinus dominicus, 80–81. Tylodinus noctis, 82–83. Tylodinus kuscheli.

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 134–135. Maps showing collecting sites. 134. Occurrences in Chiapas, México of: Tylodinus rufus, Tylodinus kuscheli, Tylodinus pappi, Tylodinus jonesi, Tylodinus coapillensis; 135. Occurrences in Chiapas, México of: Tylodinus spiniventris, Tylodinus lum, Tylodinus noctis, Tylodinus pinguis, Tylodinus rugosus.

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).

FIGURES 12–19. 12. Tylodinus pusillus head a) male, b) female. 13–14. Dorsal habitus of pronotum showing the lateral side of pronotum 13. Tylodinus andersoni, 14. Tylodinus porvenirensis. 15–17. Dorsal habitus: 15. Tylodinus rugosus, 16. Tylodinus exiguus, 17. Tylodinus jonesi. 18. Tylodinus coapillensis note tubercle on elytra declivity base, 19. Tylodinus elongatus showing metasternal tooth.