Kalohydnobius dentatus 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 : 35-37

Kalohydnobius dentatus Peck & Cook , new species

( Figs. 5 , 87 , 95–100 )

Type material. Holotype: ♂ ( CMNC). UNITED STATES: Alabama: Jackson County, 5 miles N Garth, 19.V.1972, S. Peck, Berlese no. 239 . Paratypes (8): UNITED STATES: Alabama: with same data as holotype, ♂, 2♀♀ ; Kentucky: Floyd County, Jennie Wiley State Park , 7.VII.1968, S. Peck, Berlese no. 134, log and stump litter, ♀ ( SBPC) ; Powell County, Raven Rock , 2 mi N. Stanton, 8.X.1968, T. Barr, N. Andrews, rocks in stream, ♀ ( SBPC) ; North Carolina: Macon County, Coweeta Hydrological Lab , 12–22.IX.1974, R. Turnbow, pitfall traps, 2♀♀ ( FSCA) ; Tennessee: Henderson County, Natchez Trace State Park , 6.X. 1973, 600 feet, A Newton, forest floor leaf litter, ♀ ( FMNH) .

Diagnostic description. Body dark reddish brown to nearly black, shining. Length of pronotum + elytra = 2.6–3.0 mm (males), 2.6–2.8 (females). Head finely, sparsely punctate with microsculpture of fine lines on vertex. Pronotum widest at base, sides slightly rounded, narrowed to apex; basal angles rounded, posterior margin weakly sinuate before basal angles in males; ratio length:width = 1:1.5; minutely punctate, discal punctures in closely spaced pairs, microsculpture of fine wavy lines. Elytra wider than pronotum, ratio length:width = 1:0.8; with 9 closely punctate striae; stria 1 impressed posteriorly, striae 6 and 7 do not reach apex; intervals with 1–2 rows of fine punctures, transversely striolate; uneven intervals with scattered larger punctures. Antennal club ( Fig. 95 ) moderately slender, ratio club width:length = 1:3.2; width ratio of antennomeres 7:8:9 = 1.3:1:1.6. Mandibles ( Fig. 96 ) stout, a thin plate forming inner apical margins. Labrum entire. Profemur and mesofemur unarmed in both sexes; male metafemur ( Fig. 97 ) with large, apically directed tooth on posterior margin before apex; metafemur of female unarmed. Protibia and mesotibia of both sexes slender, spinose; metatibia of male ( Fig. 97 ) slender, strongly curved, wider in apical one-half, spinose; female metatibia slender, spinose. Male. Aedeagus ( Fig. 98 ) with median lobe elongate, broad, tapering at apical one-fifth to narrow apex. Parameres inserted near basal one-third of median lobe, sinuate, not reaching apex of median lobe, with setae apically, dorsally and on inner margins. Each paramere laterally with cup-like notch near base. Inverted internal sac with a pair of sclerotized large curved teeth. Female. Coxites ( Fig. 100 ) elongate, cylindrical, with narrow apices and subapical setae; elongate styli inserted at apices of coxites. Sternite 8 ( Fig. 99 ) protuberant apically; anterior apophysis broad at apex.

Distribution. Known from deciduous forest habitats in the the southern Appalachian mountains of southeastern United States ( Fig. 87 ).

Field notes. Adults were collected by sifting of forest litter and in a pitfall trap.

Seasonality. Adults are known from May, July, September, and October.

Etymology. Named with reference to the unique pair of large dentate structures of the internal sac of males of this species.

Figures

FIGURE 87. Known North American localities of Kalohydnobius strigilatus (black dots) and K. dentatus (open squares).

FIGURES 5–7. Sogdini, habitus photos. 5. Kalohydnobius dentatus, total length 2.6 mm. 6. Macrohydnobius montanus, total length 4.9 mm. 7. Platyhydnobius arizonensis, total length 2.7 mm.

FIGURES 95–100. Kalohydnobius dentatus. 95. Right antenna, dorsal view. 96. Mandibles, dorsal view. 97. Male right metafemur and metatibia. 98. Aedeagus, dorsal view. 99. Female sternite 8, ventral view. 100. Female coxites and styli, ventral view. Scale bar = 0.3 mm (Fig. 100), 0.4 mm (Figs. 95, 96, 98, 99), 0.5 mm (Fig. 97).