Ctenocolum triangulatus Albuquerque & Ribeiro-Costa, sp. nov.
Creators: name: Albuquerque, Felícia Pereira De
name: Manfio, Daiara
name: Ribeiro-Costa, Cibele Stramare
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Ctenocolum
Ctenocolum triangulatus

description: Ctenocolum triangulatus Albuquerque & Ribeiro-Costa sp. nov.
(Figs. 17, 30, 42, 61, 74, 86, 98)
Type material. Holotype deposited in ZMHB, male: “53758” [white label printed in black]; “misotur/ m.” [white label handwritten in black]; “Hist. -Coll. (Coleoptera)/ Nr. 53758/ Bruchus / aequinoctialis Erichs./ Columb., Moritz./ Zool. Mus. Berlin” [green label with black margin, printed in black]; “ Ctenocolum / SP/ det./ J. M.Kingsolver” [white label handwritten, printed in black]; “♂” [white label printed in black];]; “ HOLOTYPE / Ctenocolum triangulatus / Det. Albuquerque & Ribeiro-Costa” [white label with red margin, printed in black].
Diagnosis. Ctenocolum triangulatus Albuquerque & Ribeiro-Costa sp. nov. is different from C. milelo Albuquerque & Ribeiro-Costa sp. nov. and C. podagricus by having ocular index 4.5 and pygidium oval in both sex; differs from C. martiale by elytral striae 3 and 4 with less conspicuous teeth at base. This species differs from all others by the male genitalia at submedian region with squamous subtriangular-shape sclerite (Fig. 86).
Description. BL: 2.4 mm; BW: 1.5 mm.
Integument. Dorsum reddish brown and dark brown. Antenna dark brown, first 3 antennomeres paler (Fig. 61). Pygidium reddish brown and dark brown.Ventral region reddish brown and black. Front and middle femur and tibia brown; hind femur brown, reddish brown to dark brown.
Pubescence. Pronotum reddish brown and white; sparse setae exposing the integument forming an oval, wide area from anterior to posterior region and on each lateral region one small area (Fig. 17). Elytra slightly variegated, reddish brown and black setae; interstria 3 without white setae at base and at submedian region with short sparse strip of white setae (Fig. 17). Pygidium dense, white and yellowish gray in a spotted pattern (Fig. 42). Ventral region with setae yellowish gray, brown and white (Fig. 61).
Head. Ocular sinus 0.2 mm; ocular index 4.5; length of eyes in frontal view behind sinus 0.09 mm (Fig. 30). Antenna serrate from antennomere 4-10 (Fig. 61). Frons with frontal carina (Fig. 30).
Prothorax. Pronotum with median gibbosity slightly elevated, not divided by longitudinal and transversal sulcus (Fig. 61); lateral gibbosity slightly elevated; basal lobe with depression and slightly emarginated (Fig. 17).
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 conspicuously impressed. Hind femur (Fig. 74) on external ventral margin with toothed carina; without denticles above of external ventral margin; pecten with 8 teeth. Hind tibia (Fig. 74) strongly emarginated beside mucro; lateral coronal denticles present.
Abdomen. Pygidium longer than wide, oval, at median basal region with moderately impressed punctures (Fig. 42).
Male genitalia. Median lobe, ventral valve as long as wide, lateral margin concave on subapical region (Fig. 86), basal margin not emarginated. Internal sac, lateral apex with short tuft of setae, hinge sclerite with curved apex, long, extending through subapical region; subapical region with homogeneously distributed spicules, dense medially and in lateral forming elongated strips; median region with homogeneously distributed spicules; submedian region with squamous subtriangular- shape sclerite (Fig. 86); basal region with spicules. Tegmen (Fig. 98), lateral lobes separated by emargination about 0.85 times the length of lateral lobes; internal margin near end of emargination straight, forming a “V”; expanded at apex, about 2.5 times the smallest width on median region; without membranous projection at apex.
Note. The female is unknown.
Etymology. The specific name “ triangulatus ” refers to the squamous subtriangular-shaped sclerite of male genitalia.
Distribution. Neotropical region: Colombia.
description: Published as part of 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, pp. 1-45 in Zootaxa 3838 (1) on page 34, DOI: 10.11646/zootaxa.3838.1.1, http://zenodo.org/record/286727