Cylindridia rubripes

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 : 194-195

Cylindridia rubripes sp. n.

Holotype male (dissected), Costa Rica, labeled: “COSTA RICA: Prov. Heredia :/ 6km ENE Vara Blanca, 1950-/ 2050m, 10T 1 'N 84°07 W/ leg. J. Prena, 21.-25.4.2004/ INBio-OET-ALAS transect ” ( INBC) .

Paratypes 202 (92 males, 110 females), Costa Rica, labeled: as holotype ( JPPC 13 ); same data except 20.4.2002, 20/RG/RVC/011, INB0003230282 ( INBC 1); same data except 15.111.2002,20/RG/DBM/007 ( INBC 1); same data except 14.IV.2002, 20/RG/DBM/011 ( INBC 1); “ COSTA RICA: Heredia / Cerro Chompipe / 10°05/20"N, 84°04'30"W/ ca. 2km. N. Monte de la/ Cruz, 2000 m, 12.VI.1997/ R. Anderson, cloud forest/ 97-012-X, on Cyperaceae.” ( CMNC 18); “ COSTA RICA, Prov. Limon:/ P.N. La Amistad , Valle del/ Silencio , 10km NE Altamira,/ 2500 m, 9°07'N 82°58' W,/ 24.2.-26.2.2005, leg. J. Prena ” (JPPC 13, MNHN 2); “ COSTA RICA, Cart. Rd./ to Biol. Sta. Cuerisi [ Cuerici ],/ 2600 m. VTII-28-1998/ C.W. & L.B. O’Brien ”, “on/ Cyperaceae ” (CWOB 10); “ COSTARICA, Cart./ Biol. Sta. Cuerisi [ Cuerici ],/ 2600m. VIIT28-1998/ C.W. & L.B. O’Brien ”, “on/ Cyperus ” (CWOB 11); “ COSTARICA: Prov. San José:/ R.F. Los Santos , Villa Mills , La/ Georgina , Hwy. km 95, 2900-/ 3000 m, 9°34'N 83°45,W/ 3.3.2000, leg. K. Nishida ” (JPPC); same data except last line “3.-6.3.2005, leg. J. Prena ” (JPPC 72, MNHN 2); “ COSTA RICA, Cart. Cer-/ ro de la Muerte , Villa/ Mills , 3000m. VII-IX-1990,/ malaise trap, P. Hanson ” (CWOB 1); “ COSTA RICA, S.J.,/ 26mi.N. [on highway from] San Isidro/ del General , 10,500 7 VI-23-1974”, “ C.W. & L.B. O’Brien / & G.B. Marshall ” (CWOB 1); “ COSTA RICA, S.J.,/ 29mi.N. [on highway from] San Isidro/ del General, 110007 VI-23-1974”, “on Carexl lehm anniand', “ C.W. & L.B. O’Brien / & G.B. Marshall ” (CWOB 43); same data except “ex Carex / sp.” (CWOB 2); “ COSTA RICA, S.J./ 29mi.N. [on highway from] San Isidro/ del General , 110007 VII-10-1974”, “ C.W. & L.B. O’Brien / & G.B. Marshall ”, “on Chusqueal subtesselata (CWOB 5); same data without plant association (CWOB 2); “ COSTA RICA, S.J./ 33mi.N. [on highway from] San Isidro/ del General , 105007 VII-10-1974”, “C.W & L.B. O’Brien / & G.B. Marshall ” (CWOB 2); “ COSTA RICA, S.J.,/ 32mi.N. [on highway from] San Isidro/ del General , 10,500 7 VI-22-1974 C.W. Sc L./ O’Brien & Marshall” ( CWOB 1 ) .

Description: Fig. 1, 12-15 , 23, 24 . Total length 2.4-5.8 mm, standard length 2.3- 5.6 mm; derm dark green with metallic luster, glabrous, legs red, rostrum and antenna fuscous to partially red (>2500 m elevation); rostrum approximately as long as or longer than pronotum, curved basally in male, nearly straight in female, lamellar process ventrad of antennal insertion not angularly projecting; antennal club elongate, at least as long as distal five funicular segments combined; sides of aedeagus subparallel, apex pointed or round (small specimens at 3000 m elevation), body of aedeagus and apodemes of subequal length, internal sac as long as apodemes, with complex blade-like basal sclerite, tegmen with parameres slightly shorter than basal apodem; male sternite 9 with distal appendices very unequal.

Distribution: Costa Rica (with one site near Panamanian border), Cordilleras Central and Talamanca, 2000-3100 m elevation.

Plant associations: I reared 11 specimens from Carex donnell-smithii in Valle del Silencio, O ’B r ie n collected two specimens ex Carex sp. in Villa M ills. Adult weevils were collected from Carex lem anniana (O ’B r i e n & M a r s h a l l 43), Carex sp. (P r e n a 2), Cyperus sp. (O ’B r i e n 11), Rhyncbospora ruiziana (P r e n a 8 8), unidentified Cyperaceae (A n d e r s o n 17, O ’B r i e n 10) and Chusquea subtesselata (O ’B r i e n 5). H ie latter association, with a species of Poaceae, might be accidental.

Epithet: The name is a compound Latin noun referring to red legs.

Discussion: I include under C. rubripes specimens with reddish legs and a characteristic blade-like basal sclerite in the male ( Fig. 15 ). However, their morphological range is noteworthy. An analysis of the meristic data reveals statistically significant differences between local populations: (1) the length-width ratio of the pronotum decreases linearly with increasing altitude, (2) the standard length decreases exponentially with increasing altitude, and (3) the length of the ante-antennal portion of the rostrum differs from site to site without obvious altitudinal effect. A gradual transition is apparent in the length-width ratio of the body of the aedeagus over the entire altitudinal range, while the apical shape changes at approximately 2500 m from triangularly pointed ( Fig. 12 ) to round ( Fig. 13 ); the shape is intermediate in specimens from Cuerici. At 3000 m, male specimens consistently exhibit greatly reduced prosternai spines. For distinction from the other Costa Rican species, C. fuscipes, see discussion there.

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.