Dendrocellus gestroi Bates

Liang, Hongbin & Kavanaugh, David H., 2007, Review of the Genus Dendrocellus Schmidt-Göbel (Coleoptera: Carabidae: Dryptini), with Descriptions of Seven New Species, The Coleopterists Bulletin (Oxford, England) 61 (1), pp. 1-39 : 1-39

Dendrocellus gestroi Bates

( Fig. 10 )

Dendrocellus gestroi Bates 1892: 385 ( Myanmar)

Desera gestroi (Bates 1892) , Heller 1923: 303

Type. Lectotype, here designated, a female ( MCSN), labeled ‘‘Carin Chebà, 900–1,100 m, L. Fea, V XII-88’’/‘‘Typus’’/‘‘ Dendrocellus gestroi Bates’’/‘‘ Gestroi Bates’’/‘‘ Dendrocellus Gestroi Typus Bates’’/‘‘ Syntypus, Dendrocellus gestroi Bates 1892 ’’[red label]/, ‘‘Museo Civico di Genova’’/‘‘ LECTOTYPE, Dendrocellus gestroi Bates , designated by H. B. Liang & D. H. Kavanaugh 2006’’ [red label].

Description. Length 10.0 mm, width 3.2 mm. Black with blue luster, apical twothirds of Ant 1, Ant 2 and basal two-thirds of Ant 3 blackish brown, basal onethird of Ant 1, apical one-third of Ant 3 and Ant 4–11 brown; mandibles and palpi brown; tibiae and apical one-third of femora black, basal two-thirds of femora dark red, tarsi dark brown. Head with vertex slightly convex, densely punctate; Ant 1/Ant 3 5 3.33; labrum with medial lobe slightly protruded anteriorly; genae long, distinctly tumid; eyes small, 1.9 times as long as genae. Pronotum densely punctate, PL/PW 5 1.36, HW/PW 5 1.06, widest slightly before middle; apical angles round, lateral margins straight and widened from apical angles to widest point, then narrowed posteriorly and sinuate to basal angles; basal angles acute, pointed laterally; lateral furrow distinct; basal foveae deep; middle line fine. Elytra short and wide, lateral margins widened from base to apical third, then narrowed to apex; EL/EW 5 1.56, EW/PW 5 2.22; intervals slightly convex, moderately punctate, interspace between two adjacent punctures 1.5–2.0 times diameter of punctures; outer angles strongly dentate, apex pointed (similar to Fig. 41 ). Tarsal claws with 5–6 long pectinations, length of individual pectination subequal to width of claw base (similar to Fig. 60 ).

Distribution. Myanmar.

Remarks. In his original description of D. gestroi, Bates gave no indication of the number of specimens in his type series. This means that, although only a single female specimen is to be found in the MCSN collection, bearing both ‘‘typus’’ and ‘‘syntypus’’ labels (see above), it must, according to the International Code of Zoological Nomenclature (Article 73.2), be considered a syntype and designated as a lectotype.

The single known specimen of this species is similar to those of D. unidentatus (Macleay) in having acute elytral outer angles, long tarsal claw pectinations, and black tibiae, but differs from the latter in having a short pronotum (PL/PW 5 1.36, but 1.50–1.67 in D. unidentatus ) and wider elytra (EL/EW 5 1.56, but 1.67– 1.93 in D. unidentatus ). Its acute elytral outer angles and long tarsal claw pectinations are different from those of D. nepalensis (Hope) and D. kulti (Jedlicka) adults. The dark red base of the femora and small eyes of this specimen (and presumably all members of this species) are apparently unique within the genus.

Figures

Figs. 1–12. Habitus of Dendrocellus species. 1) D. australis (male, Congo); 2) D. coelestinus (syntype); 3) D. coelestinus (type of D. paralellus); 4) D. confusus (male, Thailand); 5) D. crassus (male, Borneo); 6) D. elegans (male, New Guinea); 7) D. rugicollis (lectotype); 8) D. geniculatus (holotype); 9) D. geniculatus (holotype of D. gilsoni); 10) D. gestroi (lectotype); 11) D. inexpectus (holotype); 12) D. javanus (holotype). Scale line 5 2.0 mm.

Figs. 35–43. Left elytron apex of Dendrocellus species. 35) D. kulti (male, Yunnan); 36) D. nepalensis (male, Pedong, India); 37) D. rugicollis (lectotype, India); 38) D. micropectinatus (holotype); 39) D. australis (male, Congo); 40) D. geniculatus (male, Tibet); 41) D. sinicus (holotype); 42) D. elegans (male, New Guinea); 43) D. unidentatus (male, Java). Scale line 5 1.0 mm.

Figs. 57–72. Tarsal claws of hind tarsi of Dendrocellus species and Drypta species. 57) D. rugicollis (lectotype); 58) D. elegans (male, New Guinea); 59) D. schultzei (lectotype); 60) D. sinicus (holotype); 61) D. inexpectus (holotype); 62) D. javanus (male, Java Occid., paratype); 63) D. nigripennis (holotype); 64) D. geniculatus (male, Tibet); 65) D. australis (male, Congo); 66) D. queenslandicus (holotype); 67) D. confusus (male, Thailand); 68) D. nepalensis (male, Pedong, India); 69) D. coelestinus (syntype); 70) D. micropectinatus (male paratype, Congo); 71) Drypta longicollis Macleay 1825 (male, Thailand); 72) Drypta lineola virgata Chaudoir 1850 (male, Vietnam). Scale line 5 0.1 mm.