Cymatodera depressa Burke & Sole, 2017

Burke, Alan F., Sole, Catherine L., Toledo-Hernández, Víctor H. & Scholtz, Clarke H., 2017, Five new species of Cymatodera Gray, 1832 (Coleoptera: Cleridae: Tillinae) from Mexico and Central America, Zootaxa 4350 (1) : -

Cymatodera depressa Burke & Sole , sp. n.

( Figs 4 , 11, 12 , 19 , 25 , 30 , 31)

Type material. Holotype: Red labelled, male: Mexico, Hidalgo, Chapulhuacan, 26-27-VII-1981, B. C. Ratcliffe and C. L. Messenger ( UNSM).

Paratypes (12) Yellow labelled: 4 males and 2 females: same data as holotype ( UNSM), except one male collected on 25-VII-1985 ( UPIC); 1 male: Mexico, Tamaulipas, Cd. Victoria, Rancho la Reja, 6-8000’, 30-VII-1- VIII-1981, B. C. Ratcliffe and C. L. Messenger ( UNSM); 1 female: Mexico, Veracruz, 3 km S of Xalapa, 25-30-V- 1991, 1350 m, B. C. Ratcliffe, J. Ashe and M. Jameson; 1 male: Mexico, Queretaro, km 8 Neblinas - Agua Zarca, 21-VII-1998, 21°15’14” N 99°04’58”, E. Barrera and C. Mayorga; 1 male: Mexico, Queretaro, km 9 Neblinas - Agua Zarca, 23-VI-1998, L. Cervantes and G. Ortega; 1 female: Mexico, Queretaro, San Joaquin - Las Ranas, 20°55’28” N 99°33’53” W, 16-X-1997, 2450m, E. Barrera and H. Brailovsky; 1 male: Mexico, Veracruz, S slope Volcan San Martin Tuxtla, 3000’, 5-V-1994, E. Giesbert.

Differential diagnosis: Cymatodera depressa is distinguished from superficially similar species (e. g. C. angulifera Gorham , C. flexuosa Gorham , C. liturata Gorham , C. nitida Gorham , C. pallidipennis Chevrolat and C. saturata Gorham ) by the following characters: integument with a broad, dark and sinuous band on the posterior 1/ 3 of the elytral disc; elytral punctuations irregularly arranged; and anterior margin of elytral disc not reduced, with posterior wings fully developed. In addition, males of the new species have the pygidium broadly rounded and posteriorly V-shaped emarginate ( Fig. 11 ), and a metathoracic projection in the form of a tubercle at each side of the metaventral extensions ( Fig. 31).

Description: Holotype male. Form elongate; cylindrical; slender; metathoracic wings fully developed. Total length: 8.4 mm. Color: legs, antennae, mouthparts, elytral integument and abdomen testaceous to brown; head, pronotum, pro, meso and metaventrite brown to dark brown; elytral ground decorated with a pattern of brown to dark brown transverse, irregular fasciae of various sizes and a broad, transversal, irregular fascia located on posterior 1/3 of elytral disc ( Fig. 4 ).

Head: HL = 1.42 mm, HW = 1.55 mm. Measured across eyes wider than pronotum; surface shiny; coarsely punctate, punctuation deep and broad; frons not bi-impressed; clothed with short, fine, recumbent setae and long, erect setae; eyes ovoid, taller than wide, separated by approximately 1.9 eye-width, bulging laterally. Antennae slender, extending beyond anterior margin of elytra; second and third antennomere about the same length, fourth antennomere approximately 1.5 × the length of third antennomere, antennomeres 4-10 about same length, eleventh antennomere approximately same size of tenth antennomere; antennomeres 2-6 cylindrical, antennomeres 7-10 very feebly serrate, eleventh antennomere ovoid in shape.

Thorax: PL = 2 mm, PW = 1.27 mm. Pronotum elongate; posterior margin as wide as middle; sides constricted laterally; slightly more strongly constricted behind middle; disc flat, feebly impressed in front of middle; subbasal tumescence pronounced; surface shiny, rugulose; punctuations narrow, deep; feebly vested with short, pale, semierect setae interspersed with long, erect, setae. Prosternum wider than long; anterior 1/2 slightly elevated; surface shiny, rugulose; very feebly, shallowly punctate, glabrous; posterior 1/2 strongly rugose, glabrous. Mesoventrite subquadrate; surface shiny, strongly, coarsely punctate; vested with long, pale, semirecumbent setae. Metaventrite strongly convex; feebly rugulose; each side of metaventral extensions produced posteriorly in the form of a divergent, slightly curved downward tubercle ( Fig. 31); scarcely, shallowly punctate; clothed with fine, pale, recumbent setae.

Legs: Femora transversally rugulose; finely, shallowly punctate; clothed with long, pale, semierect setae. Tibiae shiny; transversally rugose; feebly vested with short, recumbent setae interspersed with some erect setae.

Elytra: EL = 5.4 mm, EW = 2.1 mm. Anterior margin arcuately emarginate; wider than widest portion of pronotum; epipleural margin feebly arcuate; wider on posterior 1/3; disc rather convex; apex subtriangular, feebly dehiscent; elytral sculpturing consisting of small, coarse punctations arranged in irregular striae interspersed with larger, shallow, light and dark brown punctations forming an irregular pattern of spots, the latter punctations extend from elytral base to apex; punctations at elytral base moderately coarse and deep; elytral disc shiny, rugose; feebly clothed with short, pale, fine, semierect setae intermixed with less numerous, long, pale, erect setae.

Abdomen: Ventrites 1–3 shiny; finely punctate; scarcely clothed with short, pale, fine, recumbent setae; each ventrite with a median, longitudinal, slightly elevated carina that does not reach lateral margins ( Fig. 30 ). Fourth visible ventrite feebly convex; subquadrate; anterior 1/2 coarsely punctate; posterior 1/2 heavily vested; vestitures brown, short, stout, more heavily arranged at median portion of ventrite ( Fig. 30 ). Fifth visible ventrite feebly excavated; heavily vested, vestitures brown, short, stout; posterior margin broadly, U-shaped emarginate ( Figs 11 , 30 ). Sixth visible ventrite broader than long; conspicuously excavated; surface heavily vested; vestitures brown, short, stout; lateral margins broadly oblique, arcuate; posterior margin broadly, deeply, V-shaped emarginate ( Figs 11 , 30 ). Fifth tergite rugose; moderately deeply, V-shaped emarginate ( Fig. 12 ). Sixth tergite subquadrate; slightly convex; longer than broad; surface very finely rugulose; feebly vested with few recumbent, fine, pale setae; lateral margins slightly arcuate on anterior 1/2, then very feebly emarginate on posterior 1/2; posterior margin rounded, slightly tapering on middle ( Fig. 12 ). Lateral angles of sixth ventrite conspicuously extend beyond lateral margins of sixth tergite.

Aedeagus: AL = 2.1 mm. Long; sclerotized; ratio of length of paramere to whole tegmen 0.14: 1; tegmen covering phallus; parameres developed, conspicuously tapered apically; phallobase wide; phallus with copulatory piece rounded at apex; phallic plate with a row of well-developed denticles; phallobasic apodeme long, slender distally; endophallic struts slender throughout their length ( Fig. 25 ).

Variation: Members of the type series show variation in integument color, ranging from light testaceous to dark brown. Total body length of the examined specimens ranges from 6.2 to 9.7 mm. Some males and females have the lateral portion of ventrites 1-5 depressed laterally, these depressions are light testaceous in color. Remaining characters are constant.

Females: Ventrites 1-3 of females lack the longitudinal carina observable in males ( Fig. 30 ). Ventrites 5-6 are not heavily vested by short and stout setae, as seen in males. The sixth abdominal segment ( Fig. 19 ) is subquadrate in shape, with the lateral margins moderately oblique and the posterior margin very feebly, shallowly emarginate to almost round.

Distribution: The type material was collected in the states of Hidalgo, Queretaro, San Luis Potosí, Tamaulipas and Veracruz, in central and southern Mexico ( Fig. 33 ). The habitat at the collecting localities is represented by subtropical deciduous forests at low elevations, and oak-pine mixed with other broad-leaved species and pure-pine forests at mid to high altitudes.

Etymology: The specific epithet depressa originates from the Latin word “depressus”, meaning depressed or excavated, a reference to the concavity of the sixth visible ventrite of males.

Figures

FIGURE 33. Map of A. Mexico and B. Central America showing the geographic position of collecting localities of: Cymatodera humeralis (black circle), Cymatodera lorenae (blues circles), Cymatodera crassa (red circles), Cymatodera depressa (orange circles), and Cymatodera nigrofasciata (green circles).

FIGURES 1 – 5. Habitus of: 1. Cymatodera humeralis n. sp. (holotype male), 2. Cymatodera lorenae, n. sp. (holotype male), 3. Cymatodera crassa, n. sp. (holotype male), 4. Cymatodera depressa, n. sp. (holotype male), 5. Cymatodera nigrofasciata, n. sp. (holotype male). Scale bars represent 1 mm.

FIGURES 6 – 17. Pygidia of: 6. Cymatodera humeralis (male, ventral view), 7. Cymatodera lorenae (male, ventral view), 8. Cymatodera lorenae (male, dorsal view), 9. Cymatodera crassa (male, ventral view), 10. Cymatodera crassa (male, dorsal view), 11. Cymatodera depressa (male, ventral view), 12. Cymatodera depressa (male, dorsal view), 13. Cymatodera nigrofasciata (male, ventral view), 14. Cymatodera nigrofasciata (male, dorsal view), 15. Cymatodera lorenae (female, ventral view), 16. Cymatodera lorenae (female, dorsal view), 17. Cymatodera humer (female, ventral view).

FIGURE 18 – 21. Pygidia of: 18. Cymatodera crassa (female, dorsal view), 19. Cymatodera depressa (female, ventral view), 20. Cymatodera nigrofasciata (female, ventral view), 21. Cymatodera nigrofasciata (female dorsal view).

FIGURE 22 – 26. Male genitalia of: 22. Cymatodera humeralis, 23. Cymatodera lorenae, 24. Cymatodera crassa, 25. Cymatodera depressa, 26. Cymatodera nigrofasciata.

FIGURE 27 – 30. First and second ventrites of: 27. Cymatodera humeralis male, 28. Cymatodera lorenae male, 29. Cymatodera crassa male, 30. Cymatodera depressa male. Arrows indicate projected carinae.