Akalyptoischion delotretos Hartley, Andrews & McHugh, 2008

Hartley, Christopher S., Andrews, Fred G. & Mchugh, Joseph V., 2007, A Taxonomic Revision Of The Genus Akalyptoischion Andrews (Coleoptera: Latridiidae), The Coleopterists Bulletin (mo 6) 61, pp. 1-50 : 20-21

Akalyptoischion delotretos Hartley, Andrews & McHugh new species

Etymology. Greek meaning ‘‘evidently punctured’’ referring to the dense, distinct punctation on the dorsal and ventral surfaces of the head and thorax.

Description. Length 1.10–1.40 mm. Width 0.35–0.45 mm. Body elongate, subparallel, surface shining, uniformly reddish brown; evenly setose, setae very short, visible only under high magnification (100 3); head narrower than pronotum by size of one eye facet, sides sinuate, clypeus narrowing at 45u angle anterior to antennal insertions; head foveae somewhat indistinct, very small, circular, much smaller than eyes; head setation even, setae very short and decumbent; head punctation dense, irregular, conspicuous on pointed specimen; eyes large and prominent with 4 facets; tempora size of one eye facet; hind angles rounded, 90u; clypeal fovea length of antennomere IV, 0.7 times width of labrum; labrum anterior margin not emarginate; mandible apex pointed with a sharp apical tooth and 3 sharp subapical serrations, prostheca short; antennae with a 3- segmented club; antennae reach hind angles of pronotum; antennomere I irregular, subglobular with posterior side pointed, II elongate oval, III small, straight sided, trapezoidal, IV slightly elongate, sides arcuate, V–VIII submonilliform, IX–XI form loose club, IX elongate, suboval, X slightly wider than long, subquadrate, XI parallel sided, elongate trapezoid.

Pronotum widest anteriorly; anterior angles rounded, lateral margin arcuate, converging posteriorly; lateral margin slightly explanate with,12 very small tubercles each bearing a short decumbent seta; median 2/3 raised with even, very short decumbent setae; pronotal foveae distinct, anterior pair narrow and transverse, posterior pair broad ovals; pronotal punctation dense, irregular, conspicuous on pointed specimen.

Elytra subparallel, lateral flange weak, present in anterior 1/3; 6 striae; humeral angle rounded; strial interspaces 3 and 5 very slightly raised; very short decumbent setae present on all intervals; epipleuron complete, narrowing posteriorly.

Ventral surface subglabrous, setae conspicuous on abdomen; submental fovea length of antennomere III with many large punctures and very few micropunctures; ventral head punctation dense, large punctures conspicuous on pointed specimen; gular punctation irregular, large, conspicuous punctures; prosternal punctation dense, large punctures; mesosternum without carinae, evenly punctate with large conspicuous punctures; metasternum with a large triangular fovea between mesocoxae, a small oval fovea posterior to each mesocoxa, a narrow arcuate fovea anterior to each metacoxa, and median surface densely punctate, punctures large and conspicuous on pointed specimen; ventrite I with 2 small geminate or irregular punctures at anterior corners of intercoxal process, a large irregular fovea 1/2 size of metacoxae posterior to each metacoxa, and median surface without punctures; ventrites II– IV unmodified.

Material Examined. HOLOTYPE, USA: label data: ‘‘CALIF: Mono Co. White Mts S. Fork Cottonwood Creek VIII-28-1984 to VI-11-1985 9,2009 D. Giuliani,’’ ‘‘Collected in Ethylene glycol pit trap’’ ( CDAE).

PARATYPES, USA, same data as holotype, 1 on slide (4, CDAE) : ‘‘CALIF: Mono Co. White Mts S. Fork Cottonwood Creek VIII-28-1984 to VI-11-1985 9,2009 D. Giuliani,’’ ‘‘Collected in Ethylene glycol pit trap’’ (1, CDAE) : ‘‘CALIF: Mono Co. 9,2009 White Mts. S. Fork Cottonwood Ck. VI-28-1986 to X-10-1986 D. Giuliani Antifreeze pit trap’’ (1, CDAE) : ‘‘CALIF: Mono Co. White Mts S. Fork Cottonwood Creek VI-10-1984 to VIII-28-1984 9,2009 D. Giuliani,’’ ‘‘Collected in Ethylene glycol pit trap’’ (1, CDAE) .

Additional Material , ‘‘CALIF: Inyo Co. 3.5 mi S, 2.5 mi W DeepSpring College III to IX-1983 5,2009 antifreeze pit trap Derham Giuliani’ ’ (1, CDAE) ; ‘‘NEV: Esmeralda Co. 1 mi. S, 9 mi W Silver Peak, Silver peak Range VII-9-77 D. Giuliani,’’ ‘‘ Berlese Cercocarpus litter’’ (3, CDAE) ; ‘‘ NEVADA: Nye Co. 5 mi N, 10 mi E Currant 7,0009 Currant Smt. X-1982 to IX-83 antifreeze pittrap D. Giuliani’ ’ (1, CDAE) .

Diagnosis. The large, conspicuous punctation of the head and thorax both dorsally and ventrally, and the impunctate median surface of abdominal ventrite I distinguish this species. This species closely resembles A. polytremetron and A. texas . It may be distinguished from A. polytremetron by the impunctate median surface of its first abdominal ventrite, and it may be distinguished from A. texas by the lack of a carina on its mesosternum.