Akalyptoischion polytremetron 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 : 41-42

Akalyptoischion polytremetron Hartley, Andrews & McHugh new species ( Fig. 11 , 23 )

Etymology. Greek for ‘‘many punctured abdomen’’ referring to the many, scattered punctures found on abdominal ventrite I.

Description. Length 1.10–1.40 mm. Width 0.35–0.45 mm. Body elongate, subparallel, light orange/brown to dark reddish brown; uniformly setose, setae short; head narrower than anterior pronotum by size of one eye facet, sides slightly sinuate; clypeus narrowing at 45u angle anterior to antennal insertions; head foveae inconspicuous, circular, slightly smaller than eyes; head setation even, setae short and decumbent; head punctation dense, conspicuous on pointed specimen, surface rugose; eyes slightly prominent with 4 facets; tempora size of one eye facet; hind angles 90u; clypeal fovea length on antennomere I, 0.6 width of labrum; labrum anterior margin slightly emarginate; mandible apex pointed with an apical tooth and 4 small subapical serrations, prostheca long; antennae with a 3-segmented club; antennae reach posterior 1/3 of pronotum; antennomere I irregular, wider than long, II large, smaller than I, globular, III small, wider than long, somewhat flattened with a notably blunt basal edge, IV–VIII submonilliform, IX–XI form club, IX large, globular, X parallel sided, subquadrate, XI elongate, subrectangular.

Pronotum widest anteriorly; anterior angles rounded, lateral margin arcuate, converging posteriorly; lateral margin slightly explanate with,11 small tubercles each bearing a short decumbent seta; median 4/5 raised with short sparse decumbent setae; pronotal foveae shallow, subcircular; pronotal punctation dense.

Elytra subparallel, lateral flange not prominent, present in anterior 1/2 only; 6 striae; humeral angle evenly rounded; strial interspaces 3 and 5 slightly raised; short decumbent setae present on each interspace; epipleuron complete, narrowing posteriorly.

Ventral surface evenly setose; submental fovea with several large punctures, irregularly sized and spaced; ventral head punctation even over whole head, punctures large; gular punctation even, punctures large; prosternum evenly punctate; mesosternum without sharp carinae; metasternum with a single fovea between and posterior to each mesocoxa, a narrow, arcuate fovea anterior to each metacoxa, and median surface evenly punctate with small scattered punctures; abdominal ventrite I with 2 large, distinct, circular foveae at anterior corners of intercoxal process, a transverse fovea posterior to each metacoxa, and median surface irregularly punctate with small scattered punctures; ventrites II–IV may be very sparsely punctate, basal depressions normal.

Material Examined. HOLOTYPE, USA: label data: ‘‘ARIZ: Coconino Co., Grand Canyon Nat. Pk. X-14-85 ex bark/ground cover M. W. Sanderson’ ’ ( CDAE).

PARATYPES, USA, same data as holotype, 1 on slide (4, CDAE) .

Additional Material, ‘‘ ARIZONA: Cochise Co. Chiricahua Mts. elev. 5,500 ft Oct. 5 1968 ’’ (4, CDAE) ; ‘‘ Arizona Chiricahua Mts. , 8,000 ft. Oct. 6 1974 K. Stephan leg.’’ (1, CDAE) ; ‘‘ ARIZONA: Cochise, Co. Chiricahua Mts. near Portal April 28 1968 ’’ (3, CDAE) ; ‘‘ ARIZONA: St. Catalina Mts elev. 7,000 ft April 5 1969 ’’ (1, CDAE) ; ‘‘ ARIZONA: St. Catalina Mts elev. 8,000 ft April 12 1969 ’’ (1, CDAE) ; ‘‘ ARIZONA: St. Catalina Mts elev. 7,000 ft April 14 1968 ’’ (2, CDAE) ; ‘‘ ARIZONA: St. Catalina Mts elev. 8,000 ft April 21 1968 ’’ (1, CDAE) ; ‘‘ ARIZONA: St. Catalina Mts elev. 8,000 ft June 16 1968 ’’ (5, CDAE) .

Remarks. This species is unique in its many punctured abdominal ventrite I ( Fig. 11 ). These characteristic punctures can only be seen on cleared and slidemounted specimens. This species closely resembles A. delotretos , which differs by lacking punctures on abdominal ventrite I.

Figures

Figs. 6–11. 6) A. atrichos male, right mandible, dorsal view; 7) A. tomeus, right mandible, dorsal view; 8) A. atrichos, male, labrum, dorsal view; 9) A. tomeus, labrum outline, setae removed; 10) A. tomeus, female, abdominal ventrite I; 11) A. polytremetron, female, abdominal ventrite I.

Figs. 22–24. 22) A. atrichos, male, pterothorax, ventral view; 23) A. polytremetron, female, pterothorax, ventral view; 24) A. texas, pterothorax, ventral view.