Colon (Myloechus) matthewsi Peck and Cook, 2019

Peck, Stewart B. & Cook, Joyce, 2019, The Leiodidae (Coleoptera) of the Biologia Centrali-Americana, with Descriptions of New Species, The Coleopterists Bulletin 73 (1), pp. 78-84 : 83

Colon (Myloechus) matthewsi Peck and Cook , new species

Zoobank.org/ urn:lsid:zoobank.org:act:6739B803-CCF6-45D8-88FB-6B5AFADD4FED ( Figs. 10–12 )

Type Series. Holotype, male in CMNC. Labeled

“ Guatemala: Sacatepéquez / 5km SE Antigua /

14.528 46 N, - 90.68874 W / 2335m, 10–13.VI.2009, / oak forest, FIT / LLAMA Ft-B-08-2-01”. Paratypes (3): Same data as holotype (1 female); same data except “14.528 60 N, - 90.68885 W / 2330m / LLAMA FT-B-08-2 - 02 ” (2 males) .

Diagnostic Description. Body color brown, head and elytral apices darker. Antenna elongate, length about equal to pronotal length; antennomere 5 subequal to 4, width less than 2X length. Submentum irregularly, coarsely punctate. Pronotal disk coarsely, densely punctate; punctures in irregular longitudinal rows, separated by narrow, smooth areas; basal angles obtuse, narrowly rounded. Protarsi dilated in both sexes and larger apical protibial spur ( Fig. 10 ) with 4 pairs of lateral serrae (saw-like teeth). Male protibia straight, stout, widening evenly to apex; metatibia straight, with small tooth before apex of posterior margin. Aedeagus ( Figs. 11, 12 ) elongate; basal bulb evenly oval, lacking left apical indentation; parameres weakly curved before middle in dorsal view, then straight with lobed apices; large patch of densely spaced, long setae on basal half, single strong seta mesad each paramere base, and single short setae at lobed apices; parameres broad basally in lateral view, evenly narrowing to apices, with small patch of fine setae at base and short, scattered setae ventrolaterally; paired, spoonshaped structures broad with truncate apices.

This species can be distinguished from C. hondurensis as follows: (1) antennae elongate with antennomere 5 subequal to 4 ( C. hondurensis antennae short with antennomere 5 about 2X as wide as long); (2) larger apical protibial spur shorter ( Fig. 10 ), with four pairs of lateral serrae (spurs longer in C. hondurensis ( Fig. 9 ), with six pairs of lateral serrae); (3) basal bulb of aedeagus ( Figs. 11, 12 ) lacking left apical indentation (present in C. hondurensis ); (4) parameres straight with apical lobes (parameres incurved apically, not lobed in C. hondurensis ); (5) paired, spoon-shaped structures of aedeagus with truncate apices (apices elongate, narrow in C. hondurensis ).

Etymology. This species is dedicated to the Rev. Andrew Matthews, who prepared the Silphidae section of the “ Biologia ”.

Figures

Figs. 1–12. Aglyptinus horni, lectotype, aedeagus: 1) Lateral view; 2) Dorsal view. Anogdus championi, holotype, aedeagus: 3) Lateral view; 4) Dorsal view. Colenis punctulata, holotype, aedeagus: 5) Lateral view; 6) Dorsal view. Colenis crassicornis, holotype, aedeagus: 7) Lateral view; 8) Dorsal view. 9) Colon (Myloechus) hondurensis, protibial spur. Colon (Myloechus) matthewsi, holotype: 10) Protibial spur; 11) Aedeagus, lateral view; 12) Aedeagus, dorsal view. Scale line = 0.30 mm (Figs. 1, 2); 0.25 mm (Figs. 3, 4); 0.10 mm (Figs. 5–8); 0.15 mm (Figs. 9, 10); 0.20 mm (Figs. 11, 12).