Tylodinus mutabilis 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 : 38

20. Tylodinus mutabilis Luna-Cozar , sp. nov.

( Figures 64–65 , 113 , 132 )

Diagnosis. Length male, 2.3–2.8 mm, female, 2.4–2.7 mm. Width male, 1.1–1.4 mm, female 1.2–1.3 mm. Body approximately 2.3x longer than wide. Head with light brown to yellow scales; vertex with patch of overlapping whitish scales on middle of vertex. Pronotum in dorsal view feebly convex, outline with anterior and posterior constriction; disc somewhat hollowed. Elytra with basal margin sinuate; base of declivity with tubercle on I2 similar in size to tubercle on I4. Metasternum concave. Male abdomen with ventrite 1 concave, ventrite 2 with transverse line of scales along median line. Premucro absent. Male genitalia ( Figures 113 ) with median lobe in lateral view weakly curved, moderately stout; apical process in lateral view moderately large (0.26–0.34 as long as median lobe), slightly curved, abruptly curved downward; in ventral view not constricted beyond the median orifice. Female genitalia with tergite eight trapezoidal, slightly curved at the apex, sternite eight trapezoidal; length of membranous median area 1/3 or ½ as long as basal plate; spermatheca very shallowly curved, ramus and nodulus indistinct.

Comments. This species is variable in the curvature of the front tibiae, sometimes being slightly sinuate; also, the external tooth on the middle tibia is weak or absent.

Geographic distribution. México (Chiapas).

Habitat and elevation. Specimens were collected from leaf litter in various types of forest between 1100–1900 m.

Derivation of specific name. Name derived from Latin word mutabilis = changeable; inconstant.

Material examined. Total 23 males, 19 females. Holotype male ( CMNC): México: Chiapas, Villa Corzo, Ejido Sierra Morena, Reserva de la Biósfera La Sepultura , (16° 09' 10.6"N, 93° 35'25.1"W), elev. 1600 m, 19–20.vii.2005. R . Anderson, oak pine ridge forest litter 2005-004A. Paratypes: México: Chiapas, same locality, elev. 1800 m, 18/ 19.vii.2007, R . Anderson — 1 male, 1 female (( CMNC ); La Concordia, Reserva El Triunfo, Campamento el Quetzal , elev. 1850 m (15° 43'17"N, 92° 56'21.8"W), 17.v.2008, coll. R . Anderson - 1 female ( CMNC); same locality, 19.vii.2007, coll. R . Anderson — 1 female ( CMNC); same locality, elev. 1860m, 17.v.2008, coll. R . S. Anderson — 1 male ( CMNC); same locality (15.72173N 92.94059W), elev. 1850m, 20.v.2008, coll. R . S. Anderson — 1 female ( CMNC); 2 km SE Custepec , elev. 1520 m (15° 43'13.8"N, 92° 57'1.1"W), 17.v.2008, coll. LLAMA (Wa-A-02-1-13) - 1 female ( ECOS); same locality (15.72078°N 92.95047°W), 17.v.2008, coll. LLAMA (Wa-A-02-1-18) — 1 male ( ECOS); same locality (15.72098°N 92.95054°W), 17.v.2008, coll. LLAMA (Wa-A-02- 1-22) — 1 male ( CMNC); same locality (15.72053°N 92.95100°W), 17.v.2008, coll. LLAMA (Wa-A-02-1-41) — 1 female ( ECOS); same locality (15.72051°N 92.95104°W), 17.v.2008, coll. LLAMA (Wa-A-02-1-42) — 1 male ( CMNC); same locality, elev. 1700 m (15.71522°N 92.93794°W), 17.v.2008, coll. LLAMA (Wa-A-02-2-39) — 1 female ( CMNC); same locality, elev. 1700 m (15.71530°N 92.93820°W), 17.v.2008, coll. LLAMA (Wa-A-02-2- 40) — 1 male ( CMNC); Villa Flores, Reserva La Sepultura, Ejido Sierra Morena , Parcela Escolar , elev. 1350 (16° 9'10.4"N, 93° 35'25.1"W), 23.vi.2006, coll. J. L. Cozar — 1 male ( CMNC); Villa Flores , Ejido Sierra Morena, R . Biosfera La Sepultura , elev. 1400 m (16°9'10.4''N, 93°35'25.1''W), 17-18.vii.2003, coll. R . S. Anderson — 1 female, 1 male ( CMNC); same locality (16°09.351’N 93°36.045’W), elev. 1450 m — 1 female ( CMNC); same locality (16°09.856’N 93°36.291’W), elev. 1497 m — 3 males, 1 female ( CMNC); same locality (16.16121°N 93.60024°W), elev. 1137 m — 2 males, 1 female ( CMNC, ECOS); same locality, elev. 1235 m, 19-20.vii.2005, coll. R . S. Anderson — 1 male, 1 female ( CMNC); same locality, elev. 1350 m — 1 male, 2 females ( CMNC); same locality, elev. 1450 m — 2 males, 1 female ( CMNC); same locality, elev. 1600 m — 1 male, 1 female ( BMNH, CMNC); same locality (16.15976°N 93.60505°W), 12.v.2008, coll. LLAMA (Wa-A-01-1-26) — 1 male ( ECOS); same locality (16.16044°N 93.60516°W), 12.v.2008, coll. LLAMA (Wa-A-01-1-44) — 1 male ( CMNC); same locality (16.15458°N 93.60080°W), 12.v.2008, coll. LLAMA (Wa-A-01-2-05) — 1 male ( ECOS); same locality (16.15276°N 93.60079°W), 12.v.2008, coll. LLAMA (Wa-A-01-2-36) — 1 male ( CMNC); same locality (16.15287°N 93.60059°W), 12.v.2008, coll. LLAMA (Wa-A-01-2-41) — 1 female ( ECOS); same locality (16.15292°N 93.60051°W), 12.v.2008, coll. LLAMA (Wa-A-01-2-43) — 1 female ( CMNC); Sierra Morena , elev. 1550 m (16.1529°0'N, 93.5903°0'0''W), 17-18.vii.2003, coll. R . S. Anderson — 1 female ( CMNC) .

Figures

FIGURES 60–67. Dorsal and lateral habitus: 60–61. Tylodinus lum, 62–63. Tylodinus spiniventris, 64–65. Tylodinus mutabilis, 66–67. Tylodinus parvus.

FIGURES 110–119. Ventral and lateral habitus of median lobe: 110. Tylodinus sepulturaensis, 111. Tylodinus lum, 112. Tylodinus spiniventris, 113. Tylodinus mutabilis, 114. Tylodinus parvus, 115. Tylodinus pusillus, 116. Tylodinus porvenirensis, 117. Tylodinus elongatus, 118. Tylodinus complicatus, 119. Tylodinus rufus.

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.