Akalyptoischion hormathos Andrews

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 : 36-37

Akalyptoischion hormathos Andrews

( Fig. 37 , 48 )

Akalyptoischion hormathos Andrews 1976 a: 9

Description. Length 1.10–1.25 mm. Width 0.35–0.37 mm. Body elongate, subparallel, uniformly orange/brown to reddish brown; glabrous; head narrower than pronotum by one eye width, sides slightly sinuate, anterior head not much narrower than posterior head; clypeus narrowing at 45u angle anterior to antennal insertions; head foveae shallow, indistinct, size of eyes; head punctation irregular, not very dense, surface rugose; eyes small, not prominent and appressed to head, with 4 or 5 small facets; eyes sometimes unpigmented and indistinct; tempora 1/2 to 3/4 eye width; hind angles rounded, greater than 90u; clypeal fovea length of antennomere V, 0.7 times width of labrum; labrum anterior margin deeply and evenly emarginate; mandible apex pointed with an apical tooth and 3–4 subapical serrations decreasing in size basally, prostheca short; antennae with a 3- segmented club; antennae reach hind angles of pronotum; antennomere I wider than long, a slightly irregular oval, II slightly longer than wide, oval, III small, slightly elongate, sides arcuate, IV–VIII small, submonilliform, IX–XI form club, IX large, globular, X larger than IX, sides parallel, XI larger than X, parallel sided, elongate trapezoid.

Pronotum widest anteriorly, anterior angles rounded, lateral margin straight sided and converging slightly posteriorly; lateral margin slightly explanate with,10 small tubercles spaced far apart, each bearing a microscopic seta; median 2/3 raised; pronotal foveae indistinct, each oval shaped and limited to base of raised area; pronotal punctation irregular and not dense, surface rugose.

Elytra subparallel, lateral flange present in anterior 1/3 only; 6 striae; strial punctures large and touching each other; humeral angle evenly rounded, not lobed; strial interspaces 3 and 5 gently raised, not carinate; interspaces glabrous; epipleuron complete, narrowing posteriorly.

Ventral surface glabrous; submental fovea length of antennomere IV with few large punctures and sparse micropunctures; ventral head punctation even, not dense and sparser at midline; gular punctation very sparse and irregular; prosternum evenly punctate; mesosternum without sharp carinae; metasternum with a single fovea between mesocoxae, a small fovea posterior to each mesocoxa, an arcuate fovea anterior to each metacoxa, and median surface without punctures; abdominal ventrite I with 2 small indistinct punctures at anterior corners of intercoxal process, a large irregular fovea nearly as large as metacoxae posterior to each metacoxa, and median surface without punctures; ventrites II– IV unmodified.

Material Examined. PARATYPES, USA: label data: ‘‘ 2 mi SE Carmel Vly Monterey Co., Cal. III.31.1972,’’ ‘‘ Berlesed from Oak Duff,’’ ‘‘ Fred G Andrews KS Corwin Collectors,’’ 1 on slide (3, CDAE) .

Additional Material , ‘‘ 2 mi SE Carmel Vly Monterey Co., Cal. III.31.1972,’’ ‘‘ Berlesed from Oak Duff,’’ ‘‘ Fred G Andrews KS Corwin Collectors’ ’ (1, CDAE) ; ‘‘CALIF: Monterey Co. 2- 2 mi W Bottchers Gap XII-8-1983 A.Gilbert berlese redwood duff’’ (1, CDAE) ; ‘‘CALIF: Monterey Co. 1.1 mi W Bottchers Gap XII-8-83 berlese oak duff A.Gilbert’ ’ (1, CDAE) ; ‘‘CALIF: Monterey Co. 16 mi E Ganzales 1,0009 IV-6-1977 Berlese-live oak litter R.Somerby,’’ 1 on slide (11, CDAE) ; ‘‘CALIF: Monterey Co. 2.3 mi S Arroyo Seco , 1,500 –2,000 ft. IV-6- 1977 R. E. Somerby,coll.,’’ ‘‘ Berlesed from Oak Duff’ ’ (14, CDAE) ; ‘‘CALIF: Los Angeles Co Santa Barbara Island VI-6-1974 E.L. Paddock, R.F.Hobza et al.,colls.’’ (2, CDAE) .

Remarks. This species resembles A. atrichos but can be immediately distinguished by its lack of punctures on the median surface of abdominal ventrite I.

Figures

Figs. 36–41. Akalyptoischion spp. head, ventral view, SEM. 36) A. atrichos; 37) A. hormathos; 38) A. anasillos; 39) A. giulianii; 40) A. tomeus; 41) A. bathytrematos.

Figs. 48–49. 48) A. hormathos metasternum, ventral view, SEM; 49) A. tomeus metasternum and abdominal ventrite I, ventral view, SEM. Figs. 50–53. Akalyptoischion spp. abdominal ventrite I, ventral view, SEM. 50) A. hadromorphus; 51) A. bathytrematos; 52) A. giulianii; 53) A. heterotrichos.