Cylindridia propinqua

Prena, Jens, 2006, A preliminary study Cylindridia with descriptions of new species from Middle America (Coleóptera: Baridinae), Beiträge Zur Entomologie = Contributions to Entomology 56 (1), pp. 189-198 : 193-194

Cylindridia propinqua sp. n.

Holotype male, Mexico, labeled: “7000', 32mi. S.I Valle Nacional,/ Oax. Mex. V.21-24,/ 1971 H. Howden” (CMNC).

Paratypes 3 (1 male, 2 females), Mexico, same label as holotype (CMNC 1, JPPC 2).

Description: Fig. 9-11 , 21, 22 . Total length 4.5-5.5 mm, standard length 4.2-5.2 mm; derm dark green with metallic luster, glabrous, tibiae and tarsi red; rostrum as long as (male) or longer (female) than pronotum, evenly curved in both sexes, lamellar process ventrad of antennal insertion not angularly projecting; antennal club compact, approximately as long as distal four funicular segments combined; pronotum almost as long as wide, sides slightly rounded, constricted apically and tubulate in front; sides of aedeagus convex, apex blunt, body of aedeagus shorter than apodemes, internal sac slightly longer than apodemes, with asperities coarse in basal one-third and finer distally, basal sclerite consisting of short flagellum with pair of slender hook-like appendages, tegmen with parameres shorter than basal apodem; male sternite 9 with distal appendices very unequal.

Distribution: Mexico, Oaxaca, approximately 2150 m elevation

Plant associations: Unknown

Epithet: The name is a Latin adjective meaning “related”.

Discussion: This is the only known record for a species of Cylindridia from Mexico. W ithout dissection, the most obvious difference to the otherwise very similar Costa Rican C. rubripes is the compact antennal club and the metallic color of the femora. However, several details of the male genitalia differ significantly from those of the Costa Rican species, while agreeing much better with those of the North American C. prolixa.

Figures

Fig: 4-20: Male genitalia and associated structures. 4-8, C. prolixar. 4-5, aedeagus, dorsal and lateral; 6, tegmen; 7-8, sternites 8 and 9. 9-11, C. propinqua-. 9-10, aedeagus, dorsal and lateral; 11, basal sclerite. 12-15, C. rubripes-. 12-14, aedeagus, dorsal and lateral (13, high-elevation form from Villa Mills, 3000 m); 15, basal sclerite. 16-20, C.fiiscipes: 16-17, aedeagus, dorsal and lateral; 18, tegmen; 19-20, sternites 8 and 9. Scale bars 0.25 mm, 11 and 15 scaled by factor 3.

Fig: 21-28: Head and prothorax, lateral. C.propinqua-. 21, female; 22, male. C. rubripes-. 23, female; 24, male. C.fuscipes-. 25, female; 26, male. Cylindridia sp. A: 27, female; 28, male.