Cymatodera acutipennis Rifkind

Rifkind, Jacques, 2015, New species of Cymatodera Gray (Coleoptera: Cleridae: Tillinae) from México and Central America, with notes on others, Zootaxa 3946 (4), pp. 519-552 : 550-551

Cymatodera acutipennis Rifkind , n. sp.

( Figs. 66–67 )

Type specimens. Holotype male: México, Coahuila, Rd. to La Carbonera, SE Saltillo, 6300’, 27-IV-1981, J. Liebherr. Holotype deposited in EMEC. Paratypes: MEXICO, COAHUILA: 2, 15 mi. N. Saltillo, V-24-1952, M. Cazier, W. Gertsch, R. Schrammel, collectors; 1, Hwy 40, 12 mi. N.E. Saltillo, 4300’, 12 Sept. 1982, C. & L. O’Brien & G. Wibmer. Paratypes are deposited in WFBM and JNRC.

Diagnosis. Cymatodera acutipennis is most similar to C. neomexicana Knull , with which it shares similar coloration, elytral sculpturing, and pygidial structure, as well as the presence of elongate metaventral carinae in the males. The new species’ elongate, subacute apices will, however, serve to distinguish it from C. neomexicana and other congeners.

Description. (Holotype). Length: 8.50 mm. Form: elongate, subcylindrical. Color: brown; head, pronotum, and posterior margins of abdominal ventrites, castaneous; antennae, mouthparts, and tarsi testaceous; elytra with a pale, rather narrow, sinuate fascia posterior to middle ( Fig. 66 ), fascia attaining lateral margins and only interrupted at midline by sutural margin. Head: measured across eyes, wider than pronotum; surface shallowly rugulose– punctate, moderately densely set with mostly short, suberect and reclinate silvery setae. Pronotum: shining, very shallowly, transversely rugulose and inconspicuously punctate; vestiture as on head but with the addition of some longer, suberect silvery setae. Elytra: elongate (ratio of length to width 33:13); umbones distinct; humeral angles subquadrate; disk somewhat depressed at anterior 1/4; sides subparallel to posterior 1/3, then gradually, obliquely convergent to prolonged, subacute, feebly downturned, dehiscent apices; surface rather coarsely, deeply, serially punctate; punctures shallower posterior to fascia, obsolete at apices, which are shallowly roughened; vestiture moderately dense, composed of fine, short, reclinate silvery setae, interspersed with more robust, erect, pale and testaceous setae, some of which are rather long. Metaventrite: conspicuously armed with a pair of narrow, very elongate, infuscate carinae; surface shining, sparsely punctate laterally, set with a few fine, silvery setae. Abdomen: ventrites shining, sparsely setose; ventrite 5 with posterior margin rather deeply, arcuately emarginate; ventrite 6 ( Fig. 67 ) elongate, subrectangulate, longitudinally carinate at middle and laterally, posterior angles produced to slightly downturned points, posterior margin lobate at middle; tergite 6 elongate, subsinuate posteriorly at sides, hind angles subquadrate, posterior margin notched at middle. Aedeagus: phallus kinked and downturned at apex.

Variation. The female lacks metasternal carinae and has abdominal ventrite 5 with the posterior margin only shallowly emarginate, and ventrite 6 and tergite 6 small and rounded posteriorly.

Etymology. The specific name refers to the prolongation of the elytral apices, diagnostic for this species.

Distribution. Known only from Coahuila state in México.

Biology. Specimens were collected at 4300’ and 6300’ elevation in April, May, and September.

Figures

FIGURES 66 – 67. 66. Habitus of Cymatodera acutipennis Rifkind, n. sp. (holotype male). 67. Pygidium (ventral view) of male Cymatodera acutipennis.