Aglyptinus minor (Matthews, 1887)

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 : 81

Aglyptinus minor (Matthews, 1887) , nomen dubium

Aglyptus (?) minor Matthews 1887: 79 .

Aglyptinus minor: Cockerell 1906: 240 (new generic name, replacement for Aglyptus LeConte 1866 , not Foerster 1856); Peck et al. 1998: 50.

The single specimen of this species is female, in BMNH, with the following labels: [circular with red ring] “ Type ”; white label: “Senahu, / Vera Paz. / Champion”; pink label: [handwritten] “ Aglyptus / minor” / "B.C.A., Col., II, I / Aglyptus [female symbol].”

The specimen is in poor condition. Matthews (1887) states that the "only leg it possesses has a three-jointed tarsus", but the left posterior leg attached to the specimen is now missing the tarsus. The complete left foreleg (detached) associated with the specimen has three tarsomeres and a narrow tibia with four apical spines and one subapical spine. The one remaining antenna is missing the four apical antennomeres. Based on the tarsal formula of 3-3-3 and the general habitus, the specimen appears to belong in the genus Aglyptinus Cockerell. After comparison with over 100 Aglyptinus specimens from Guatemala (undescribed material), we are unable with any confidence to associate A. minor with any of them.

The name is here considered a nomen dubium until the genus receives a revisionary study.

Tribe Leiodini

Anogdus championi Peck and Cook , new species Zoobank.org/ urn:lsid:zoobank.org:act:EE8205E9-D9ED-4EB4-A737-FE65D7A0F9CA ( Figs. 3, 4 )

Cyrtusa blandissima Zimmermann 1869: 250 ; misidentification by Matthews 1887: 85.

Matthews listed this species under the name Cyrtusa blandissima Zimmermann, 1869 . This name, as applied by Matthews, was a misidentification, and the correctly identified name is now recognized as being a synonym of Anogdus obsoletus (Melsheimer, 1844) ( Daffner 1989) . This species is distributed from Ontario and Québec south to Texas and Alabama (Peck and Cook 2013). We therefore describe the single Guatemalan specimen cited by Matthews as a new species.

Holotype. Male , in BMNH. Type locality: Cerro Zunil, Guatemala. Specimen labeled: [white label] "Sp. figured."; [white label] "Cerro Zunil, / 4000 ft. / Champion"; [green label, handwritten] " Cyrtusa blandissima "; [white label] " B.C.A. Col., II, I."; [white label] "Lionothus / ulkei Brown?? / E. R. Tozer det. 1967"; and our red holotype label. Specimen figured by Matthews (1887).

Description of Holotype. Total length 2.0 mm; greatest width 1.3 mm. Head punctures fine and sparse between eyes, larger and denser posteriorly. Antennal club slender; antennomere 7 narrower than 9 and 10. Sides of pronotum weakly rounded, posterior angles broadly obtuse. Pronotal punctures finer and more distantly spaced than head punctures. Elytral strial punctures round and deep, separated by 1 diameter or more; interstrial punctures fine and sparse. Elytral epipleura punctate. Metasternal anterior margin with row of large, deep punctures; metasternum medially with fine punctation; large, irregularly spaced punctures laterally and posteriorly. Pro- and mesotarsi somewhat expanded, bearing white setae ventrally. Mesotibia curved, strongly spinose; mesotibial process broad, triangular, shorter than large tibial spur. Metafemur broad with triangular expansion near apex of lower margin. Abdominal sternites III–VII each with row of large punctures at anterior margin. Median lobe of aedeagus ( Figs. 3, 4 ) elongate, broad; paired apices inwardly curved. Parameres slender, reaching beyond apex of median lobe. Inverted internal sac with pair of densely spinose structures apically; elongate sclerotized tube-like structure medially; pair of dark, sclerotized structures basally.

This species most closely resembles Anogdus texanus Peck and Cook, 2013 . It differs in structures of the aedeagal internal sac.

Etymology. We name this species in honor of G. C. Champion, who was a principal collector of beetles for the “ Biologia ” in Guatemala and Panama in a four-year period during March 1879 to May 1883 and traveled and collected (often with much difficulty) throughout these countries by foot and horse ( Champion 1884, 1907). He was later employed by Godman as secretary and subeditor of the “ Biologia.” See also information about Champion in the introductory Volume 1 of the “ Biologia ” by Godman (Godman and Salvin 1879–1915), Carpenter (1945), and Selander and Vaurie (1962).

Distribution. This species is known only from a single specimen from the type locality: Cerro Zunil, Guatemala. Comparison of other specimens in CMNC and CNCI did not reveal other specimens of the species.

Tribe Pseudoliodini

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).