Akalyptoischion heptalocos 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 : 29-35

Akalyptoischion heptalocos Hartley, Andrews & McHugh new species ( Fig. 25 )

Etymology. Greek meaning ‘‘seven furrows’’ referring to the seven punctate elytral striae.

Description. Length 1.30–1.50 mm. Width 0.45–0.50 mm. Body elongate, subparallel, surface shining, light to dark brown, head and prothorax often one shade darker than elytra; uniformly setose; head narrower than anterior pronotum, sides straight; clypeus narrowing gradually at less than 45u angle anterior to antennal insertions; head foveae large, deep, round, slightly smaller

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28) abdominal ventrites, lateral view, SEM; 29) antennal club, SEM.

than eyes; head setation dense, setae decumbent; head punctation even, surface rugose; eyes slightly prominent with 2 large facets; tempora short, size of one eye facet; hind angles nearly 90u; clypeal fovea nearly length of antennomere I, 0.8 times width of labrum; labrum anterior margin slightly emarginate; mandible apex pointed with an apical tooth and 3 or 4 large subapical serrations, prostheca short; antennae with a 3-segmented club; antennae reach posterior 1/3 of pronotum; antennomere I irregular, wider than long, bearing 2 stout setae on its posterior face, II elongate oval, III small, straight sided, width equal to length, IV–VII slightly elongate, becoming progressively shorter, VIII small, globular, IX–XI form loose club, IX large, elongate oval, X elongate, wider than IX, suboval, XI larger than X, elongate oval.

Pronotum widest anteriorly; anterior angles rounded, lateral margin arcuate, converging posteriorly; lateral margin slightly explanate with,14 tubercles each bearing a decumbent seta; median 4/5 raised with dense decumbent setae; pronotal foveae transverse, distinct, anterior pair connected medially by a shallow furrow; pronotal punctation even, surface rugose.

Elytra subparallel, lateral flange weak, present in anterior 1/3 only; 7 striae, interspaces 1 and 2 fusing posteriorly; humeral angle weakly lobed; strial interspace 1 slightly raised, interspaces 4 and 6 weakly carinate; short decumbent setae present on every intespace, setae on each interspace become erect at elytral apex; epipleuron complete, narrowing posteriorly.

Ventral surface sparsely setose; submental fovea large, subrectangular, length of antennomere IV, densely micropunctate; ventral head punctation sparse but even over entire head; gular punctation even; prosternum evenly punctate; mesosternum without sharp carinae; metasternum with a distinct fovea between and posterior to each mesocoxa, a small, indistinct fovea anterior to each metacoxa, and median surface without punctures; abdominal ventrite I without fovea on intercoxal process, with a small, deep, single puncture posterior to each metacoxa, and median surface without punctures; ventrites II–IV unmodified.

Material Examined. HOLOTYPE, label data: ‘‘ MEXICO, Baja California Norte, 9 km NW Rancho Santa Ines, Lat 29u469 N Long 114u469 W El. 550 m,’’ ‘‘PITFALL TRAP # 18 ETHYLENE GLYCOL 22 March 1991 to 17 July 1991,’’ ‘‘ William H., Mary H., Cynthia J., & Karen D. Clark, & Jane C. Luther Collectors’ ’ ( CIDA).

PARATYPES, MEXICO, same data as holotype, 1 on slide (7, CIDA) ; ‘‘ MEXICO, Baja California Norte, 9 km NW Rancho Santa Ines, Lat 29u469N Long 114u469 W El. 550 m,’’ ‘‘PITFALL TRAP # 18 ETHYLENE GLYCOL 22 March 1991 to 17 July 1991,’’ ‘‘ William H., Mary H., Cynthia J., & Karen D. Clark, & Jane C. Luther Collectors’ ’ (16, CIDA) ; ‘‘ MEXICO, Baja California Norte, Mesa Palmarito Lat. 29u479N, Long. 114u449 W Elevation 800 m,’’ ‘‘PITFALL TRAP # 1 ETHYLENE GLYCOL 21 June 1990 To 22 March 1991,’’ ‘‘ William H. Clark, Ellen M. Clark Collectors (2, CIDA) ; ‘‘ MEXICO, Baja California 14.7 km East El Rosario Lat. 30u049100 N Long. 115u369000W 190 m,’’ ‘‘PITFALL TRAP # 2 ETHYLENE GLYCOL 9 March 1991 To 18 July 1991,’’ ‘‘ William H., Mary H., Cynthia J., & Karen D. Clark, & Jane C. Luther Collectors’ ’ (1, CIDA) ; ‘‘ MEX: Baja Norte 7.7 mi NW Catavina VII-3-79 to III- 24-1981 antifreeze pit trap F. G. Andrews’ ’ (1, CDAE) .

Remarks. This species superficially resembles A. bathytrematos and A. hadromorphuş but it is easily recognized by the 7 punctate striae on its elytra.

Figures

Figs. 25–26. 25) A. heptalocos, head with submental fovea indicated, ventral view;