Platyhydnobius newtonorum Peck & Cook, 2009

Peck, Stewart B. & Cook, Joyce, 2009, Review of the Sogdini of North and Central America (Coleoptera: Leiodidae: Leiodinae) with descriptions of fourteen new species and three new genera, Zootaxa 2102 (1), pp. 1-74 : 60-61

Platyhydnobius newtonorum Peck & Cook , new species

( Figs. 160 , 172–175 )

Type material. Holotype: ♂ ( FMNH). MEXICO: Colima State: Mpio. (Municipio) Minatitlan, El Terrero vicinity, 19°26.44'N, 103°57.41'W, 10–24.IX. 1999, 2130 m, A. Newton and M. Thayer, 1028, montane mesophilous forest FIT . Paratypes (5): MEXICO: Colima State: with same label data as holotype, 3♀♀ ( FMNH), 2♀♀ ( SBPC) .

Diagnostic description. Shining; head, pronotum, antennae, tibiae and tarsi dark reddish brown; elytra, venter and femora yellowish brown, elytral apices darker. Length of pronotum + elytra = 2.8 mm (male), 2.8 mm (females). Head finely punctate. Pronotum broad, widest at base, sides rounded, basal angles obtuse; ratio length:width = 1:1.7; finely punctate with faint reticulate microsculpture. Elytra short, wider than pronotum, ratio length:width = 1:0.8; with 9 regular, closely punctate striae; striae 6 and 7 do not reach apex, stria 8 does not reach base, stria 1 weakly impressed; intervals minutely punctate, transversely striolate. Antennal club ( Fig. 172 ) moderately slender, ratio club width:length = 1:3.1; width ratio of antennomeres 7:8:9 = 1.2:1:1.6. Left mandible with subapical tooth; right mandible with tooth on apical one-half of inner margin. In both sexes, all femora unarmed; all tibiae slender, spinose on outer margin, protibiae and mesotibiae weakly widened apically, male mesotibia weakly curved. Male. Aedeagus ( Fig. 173 ) with median lobe elongate, narrowed apically to small rounded tip. Parameres longer than median lobe, flat, with small lateral lobes near base. Paramere apices thin, expanded before acute tips, with two dorsal setae and many small setae apically. Female. Coxites ( Fig. 175 ) elongate, narrow, with apical and subapical setae; styli elongate, inserted at apices of coxites. Sternite 8 ( Fig. 174 ) rounded apically; anterior apophysis moderately broad, truncate apically.

Bionomics and distribution. Known only from the forested habitat of the type locality ( Fig. 160 ) in September.

Etymology. Named in honor of Al Newton and Margaret Thayer of the Field Museum, Chicago, who are two devoted field workers and authorities on staphylinoid beetles.

Figures

FIGURE 160. Known localities in Mexico and Central America of Platyhydnobius andersoni (black square), P. bicolor (open triangle), P. calvario (open square), P. howdenorum (black triangle), P. latigra (black dots), P. newtonorum (asterisk).

FIGURES 172–175. Platyhydnobius newtonorum. 172. Right antenna, dorsal view. 173. Aedeagus, dorsal view. 174. Female sternite 8, ventral view. 175. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Fig. 175), 0.4 mm (Figs. 173, 174), 0.5 mm (Fig. 172).