Ctenocolum salvini ( Sharp, 1885 )

Albuquerque, Felícia Pereira De, Manfio, Daiara & Ribeiro-Costa, Cibele Stramare, 2014, A contribution to the knowledge of New World Bruchinae (Coleoptera, Chrysomelidae): taxonomic revision of Ctenocolum Kingsolver & Whitehead, with description of five new species, Zootaxa 3838 (1), pp. 1-45 : 38-39

Ctenocolum salvini ( Sharp, 1885)

( Figs. 5, 7 , 20 , 33 , 45 , 64 , 77 , 89 , 101 ) Bruchus salvini Sharp (1885): 446 (original description, type-locality: “ Guatemala, Capetillo”).

Pseudopachymerus salvini: Pic (1913a) : 12 (catalog).

Caryedes salvini: Blackwelder (1946): 758 (catalog); Wilcox (1975): 10 (catalog).

Ctenocolum salvini: Kingsolver & Whitehead (1974a) : 287, 290, 311 (redescription, key, characters, distribution, figures, typelocality, host plant); Janzen (1980): 947 (host plant); Johnson & Kingsolver (1981): 419 (catalog); Udayagiri & Wadhi (1989): 79 (catalog).

Type material. Bruchus salvini Sharp, 1885 . Lectotype, male, here designated, deposited in BMNH: “ Bruchus S.alvini/ Type D. S/ Capetillo. Guatemala / Champion.” [white label with specimen glued, handwritten in black]; “ LECTO –/ TYPE ” [round, purple label with white center, printed in black]; “ Type ” [round red label with center white, printed in black]; “Sp. figured.” [white label printed in black]; “Capetillo,/ Guatemala./ G. C. Champion.” [white label printed in black]; “B. C. A. Col. V./ Bruchus / salvini ,/ Sharp.” [white label printed in black]; “ LECTOTYPE / Bruchus salvini / Sharp, 1885 / Det. Albuquerque & Ribeiro-Costa” [white label with red margin, printed in black]; “ Ctenocolum salvini / ( Sharp, 1885)/ F. P. Albuquerque det. 2013” [white label with black margin and printed in black]. 1 paralectotype, deposited in BMNH, male: “ PARA –/ LECTO –/ TYPE ” [round, blue label with center white, printed in black]; “ salvini ” [white label handwritten in black]; “Capetillo,/ Guatemala,/ G. C. Champion.” [white label printed in black]; “Godman-Salvin/ Coll. 1908–146” [white label printed in black]; “♂” [white label printed in black]; “ PARALECTOTYPE / Bruchus salvini / Sharp, 1885 / Det. Albuquerque & Ribeiro- Costa” [white label with yellow margin, printed in black]; “ Ctenocolum salvini / ( Sharp, 1885)/ F. P. Albuquerque det. 2013” [white label with black margin, printed in black].

Note. In the original description Sharp (1885) did not specify how many specimens he studied. He also failed to mention which museum the material was deposited. However, in the literature the type material is indicated as deposited in the BMNH ( Kingsolver & Whitehead 1974a). We received two specimens from this museum, one with ‘LECTOTYPE’ label and the other with ‘PARALECTOTYPE’ label, although a formal designation was not published. The specimens confer with the original description and the type locality is the same. The specimen with lectotype label has other “ Type ” handwritten label, probably written by Sharp, so this specimen is designated here as lectotype to improve nomenclatural stability (Declaration 44, Amendment of Article 74.7.3, ICZN 1999).

Diagnosis. Ctenocolum salvini differs from others species by the male genitalia, internal sac with long tuft of setae at lateral apex ( Fig. 89 ) and lateral lobes at apex with membranous projection ( Fig. 101 ). Comparing to other species of the group, C. salvini can be distinguished by having antennomeres 8–10 with same color as the others ( Fig. 20 ). For other comments see C. janzeni .

Redescription. BL: 4.0– 4.1 mm; BW: 2.5–2.7 mm.

Integument. Dorsum black. Antenna brown and dark brown ( Fig. 20 ). Pygidium reddish brown or rufous. Ventral region black and reddish brown or black. Front and middle femur and tibia pale and dark brown; hind femur reddish brown and black.

Pubescence. Pronotum brown, yellowish gray, black and white; sparse setae exposing the integument forming an oval, wide area from anterior to posterior region and on each lateral region two small areas ( Fig. 20 ). Elytra strongly variegated, brown, yellowish gray, black and white setae; interstria 3 only with denser strip of white setae on submedian region ( Fig. 20 ). Pygidium dense, white or yellowish gray and white; sparse setae on two basal, four lateral and one apical small region ( Fig. 45 ). Ventral region brown, yellowish gray and white ( Fig. 64 ).

Head. Ocular sinus 0.3 mm; ocular index 6.0; length of eyes in frontal view behind sinus 0.21 mm ( Fig. 33 ). Antenna serrate from antennomere 4-10. Frons with conspicuous frontal carina ( Fig. 33 ).

Prothorax. Pronotum with median gibbosity strongly elevated, not divided by longitudinal sulcus and divided by transversal sulcus ( Fig. 64 ); lateral gibbosity moderately elevated; basal lobe without depression and slightly emarginated ( Fig. 20 ).

Mesothorax and metathorax. Elytra, striae with punctures moderately impressed; less conspicuous teeth at base of striae 3 and 4; tooth of stria 4 closer to base of tooth of stria 3 than to anterior margin of elytra; stria 6 not impressed, formed only by isolated puntuation. Hind femur ( Fig. 77 ) on external ventral margin with toothed carina; with denticles above of external ventral margin; pecten with 8–12 teeth. Hind tibia ( Fig. 77 ) moderately emarginated beside mucro; lateral coronal denticles absent.

Abdomen. Pygidium longer than wide, oval, at median basal region with moderately impressed punctures ( Fig. 45 ).

Male genitalia. Median lobe with ventral valve as long as wide, lateral margins concave on subapical region ( Fig. 89 ), basal margin not emarginated. Internal sac, lateral apex with long tuft of setae, hinge sclerite curved at apex, long, extending through subapical region; subapical region with sparse spicules and a smooth sclerite, inverted V-shaped reaching the median region ( Fig. 89 ); median region laterally and medially with agglomerate of spicules; submedian region with dense denticles and smooth sclerite, hourglass-shaped with stems oriented forward, shorter than the central region ( Fig. 89 ); basal region with dense denticles. Tegmen ( Fig. 101 ), lateral lobes separated by emargination about 0.5 times the length of lateral lobes; internal margin near end of emargination curved, forming a “U”; not expanded at apex, about the same width of the median region; with membranous projection at apex.

Note. We studied only males of this species.

Distribution. Neotropical region: Guatemala (Sacatepéquez).

Host plant (Tables I–II). Papilionoideae : Dalbergia retusa Hemsl.

Figures

FIGURES 1 – 7. Ctenocolum tuberculatum: 1, Frontal habitus; 2, Lateral habitus; 3, Dorsal habitus. C. janzeni: 4, Posterior leg, external view. C. salvini (paralectotype): 5, Male genitalia, median lobe. C. colburni: 6, Male genitalia, median lobe. C. salvini (paralectotype): 7, Male genitalia, tegmen. Scale: Figs 1 – 4, 0.50 mm; Figs. 5 – 7, 0.10 mm; enlarged area of Fig. 6, 0.05 mm.

FIGURES 17 – 21. Dorsal habitus: 17 Ctenocolum triangulatus Albuquerque & Ribeiro-Costa sp. nov. (holotype); 18 C. acapulcensis; 19 C. janzeni; 20 C. salvini (lectotype); 21 C. tuberculatum. Scale: 0.50 mm.

FIGURES 31 – 34. Frontal habitus: 31 Ctenocolum acapulcensis; 32 C. janzeni; 33 C. salvini (lectotype); 34 C. tuberculatum. Scale: 0.50 mm.

FIGURES 44 – 46. Pygidium of male: 44 Ctenocolum janzeni; 45 C. salvini (paralectotype); 46 C. tuberculatum. Scale: 0.50 mm.

FIGURES 61 – 65. Lateral habitus: 61 Ctenocolum triangulatus Albuquerque & Ribeiro-Costa sp. nov. (holotype); 62 C. acapulcensis; 63 C. janzeni; 64 C. salvini (lectotype); 65 C. tuberculatum. Scale: 0.50 mm.

FIGURES 77 – 78. Posterior leg, external view: 77 Ctenocolum salvini (paralectotype); 78 C. tuberculatum. Scale: 0.50 mm.

FIGURES 85 – 90. Male genitalia, median lobe: 85 Ctenocolum pygospilotos Albuquerque & Ribeiro-Costa sp. nov. (holotype); 86 C. triangulatus Albuquerque & Ribeiro-Costa sp. nov. (holotype); 87 C. acapulcensis; 88 C. janzeni; 89 C. salvini (paralectotype); 90 C. tuberculatum. Scale: 0.10 mm.

FIGURES 100 – 102. Male genitalia, tegmen, lateral lobe: 100 Ctenocolum janzeni; 101 C. salvini (paralectotype); 102 C. tuberculatum. Scale: 0.10 mm.