Akalyptoischion tomeus 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 : 47-48

publication ID	https://doi.org/ 10.1649/0010-065x(2008)61[1:atrotg]2.0.co;2
persistent identifier	https://treatment.plazi.org/id/DF72321B-FFB1-FFA6-FE3D-FF40FF09D8E0
treatment provided by	Carolina
scientific name	Akalyptoischion tomeus Andrews
status

Treatment

( Fig. 7, 9–10 View Figs , 15 View Figs , 35 View Figs , 40 View Figs , 49 View Figs )

Akalyptoischion tomeus Andrews 1976 a: 11

Description. Length 1.23–1.35 mm. Width 0.35–0.40 mm. Body elongate, subparallel, surface shining, bright orange/red to dark reddish brown; setose, setae on elytra longer than on remainder of the body; head elongate, narrower than anterior pronotum by size of one eye facet, sides slightly sinuate, narrowing anteriorly; clypeus narrowing only slightly anterior to antennal insertions; head foveae distinct, elongate ovals, slightly larger than eyes; head setation sparse, light and inconspicuous, setae short and decumbent; head punctation very sparse, concentrated posteriorly between eyes; eyes variable from small to large and not to slightly prominent, with 4 facets; tempora 1/4 to 1/2 eye width; hind angles rounded, nearly 90u; clypeal fovea length of antennomere IV, 0.7 times width of labrum; labrum small, nearly parallel sided and narrow, not expanded past antennal insertions, anterior margin deeply emarginate; mandibles easily visible dorsally from beneath labrum; mandibles large, apex broad with a large apical tooth, 3 large subapical serrations and a 4th small serration, prostheca short; antennae with a 3 segmented club; antennae reach posterior 1/3 of pronotum; antennomere I slightly irregular, subglobular, II elongate oval, III small, subglobular, IV slightly elongate, sides arcuate, V–VIII submonilliform, IX–XI form a gradual, loose club, IX larger than VIII, globular, X larger than IX, sides parallel, subquadrate, XI parallel sided, an elongate trapezoid.

Pronotum widest anteriorly; anterior angles rounded, lateral margin slightly sinuate and converging posteriorly; lateral margin very slightly explanate with,10 tubercles, tubercles 1, 3 and posteriormost tubercle bear a long erect seta, all other tubercles bear short decumbent setae; median 3/4 raised with even short decumbent setae; pronotal foveae small, circular, limited to base of raised area; pronotal punctation very sparse, irregular.

Elytra subparallel, lateral flange small, present in anterior 1/3 only; 6 striae; humeral angle rounded; strial interspaces 3 and 5 moderately raised; long, erect setae present on interspaces 1, 3, 5 and lateral margin only, other interspaces with only microscopic setae; epipleuron complete, narrowing posteriorly.

Ventral surface sparsely setose; submental fovea large, deep, length of antennomere II, with numerous micropunctures, some confluent to form larger punctures; ventral head punctaion very sparse to impunctate; gular punctaion very sparse and irregular; a pair of large irregularly shaped foveae, sometimes confluent, present on anterior gula near posterior tentorial pits; prosternum usually with only an anterior lateral row of large single or geminate punctures and a geminate or transverse puncture anterior to each procoxa, prosternum may have scattered punctures on median surface; mesosternum without sharp carinae; metasternum with a large fovea between and posterior to each mesocoxa, an arcuate fovea anterior to each metacoxa, and median surface without punctures; abdominal ventrite I usually without punctures on intercoxal process, with a large, irregularly shaped fovea 1/2 the size of metacoxae posterior to each metacoxa, and median surface without punctures; ventrites II–IV unmodified.

Material Examined. PARATYPES, USA: label data: ‘‘ 20.9 mi E San Lucas Monterey Co., Cal. III.24.1972,’’ ‘‘ Berlesed from Heteromeles duff,’’ ‘‘Collected by E. A. Kane Berlesed by Fred G. Andrews,’’ 1 on slide (2, CDAE); ‘‘ 19.8 mi E San Lucas Monterey Co., Cal. X.28.1971,’’ ‘‘ex Heteromeles duff,’’ ‘‘ Fred G. Andrews collector,’’ on slide (1, CDAE) .

Additional Material, ‘‘CALIF: Fresno Co. 11 mi NE Auberry III-14-85 T.D.Eichlin and Fred G. Andrews,’’ ‘‘Berlesed from Neotoma nest under Quercus ,’’ 1 on slide (20, CDAE); ‘‘ 12.5 mi NE Auberry III-15-1985 T.Eichlin and Fred. G. Andrews,’’ ‘‘Berlese Neotoma nest under Quercus and Aesculus’’ (4, CDAE); ‘‘CALIF: Fresno Co. Tollhouse XII-11-80 berlesed from alder oak duff A.Gilbert’’ (12, CDAE); ‘‘CALIF: Fresno Co. Ciervo Hills 18 air mi SW Mendota III-16-1975 J.T. Doyen,’’ ‘‘Burlesed Ex Atriplex/Guiterrezia litter’’ (1, EMEC); ‘‘CALIF: Kings Co. 10 mi SW Avenal II-6-1980 T23S-R16 E-3,1009 berlesed oak-juniper duff A. Gilbert coll.’’ (6, CDAE): ‘‘ 8 mi SSW Avenal T23S- R16E-29 IV-17-1980 Andrews, Kuba & Paddock F80-13,’’ ‘‘berelsed from Neotoma nest among roots at base of oak’’ (13, CDAE); ‘‘CALIF: Napa Co., 23 mi SE Lower Lake I-7-1986 T.Eichlin, F.G. Andrews Neotoma nest at base of Quercus (3, CDAE); ‘‘CALIF: Marin Co. Pt.Reyes, Sir Francis Drake Hwy at Vinson Overlook Rd. III-18-1981 S. Kuba F81-38,’’ ‘‘berlese Neotoma nest at base of oak & poison oak on moist hillside’’ (6, CDAE); ‘‘CALIF: Kern Co., 5.5 mi NE Caliente Oiler Cyn. IV-4-1977 R. E. Somerby, coll.,’’ ‘‘Berlese Sycamore litter’’ (1, CDAE); ‘‘CALIF: Lake Co., 8 mi SE Lower Lake I-7-1986 T.Eichlin, F.G. Andrews Neotoma nest under Quercus’’ (6, CDAE); ‘‘ 12.4 mi N Rumsey Colusa Co. Cal V.1.1970,’’ ‘‘ex oak litter,’’ ‘‘Collector F. L. Blano’’ (1, CDAE); ‘‘CALIF: Shasta Co., Platina VI-6-1975 R.E. Somerby (4, CDAE); ‘‘Solano Lake Solano Co Calif II-28-71,’’ ‘‘Colr D S Chandler’’ (1, CDAE); ‘‘ 3 mi NW Rumsey Cache Creek Yolo Co Calif II-3-1971,’’ ‘‘Colr D S Chandler,’’ ‘‘Berlese Maple & Cottonwood’’ (2, CDAE); ‘‘Putah Cn Yolo Co Cal V-16- 1950,’’ ‘‘In nests of Wood Rat,’’ ‘‘A. T. McClay Collector’’ (3, CDAE): ‘‘Putah Cyn Cal Yo-Solano Co V-16-1950 ’’ (1, CDAE); ‘‘CALIF: Los Angeles Co. Bouquet Canyon at base Vasquez Valley 82-224 IV-28-1982 K.W. Cooper & F.G. Andrews,’’ ‘‘berlese Neotoma nest under Prunus same nest as 80-178’’ (4, CDAE); ‘‘ 9 mi E Clearlake Oaks Lake Co., Cal. III.29.1973,’’ ‘‘Berlesed from Oak Duff,’’ ‘‘T.R. Haig Collector’’ (1, CDAE); ‘‘CALIF: Mendocino Co., U.C. Hopland Field Station. 3.VII.1968 J. P. Anderson, P. Rubtzoff M. Winter,colls.,’’ 1 on slide (2, CASC).

Remarks. This species varies in body shape and eye size across its large range. Abdominal ventrite I usually lacks foveae on the intercoxal process, but some specimens have faint foveae present ( Fig. 49 View Figs ). The combination of very sparsely setose head and pronotum, elytra with long erect setae and no decumbent setae, deeply emarginate labrum, deep, distinct head foveae and large mandibles instantly distinguish it from all other species. Akalyptoischion tomeus most closely resembles A. pogonias , but it lacks the erect setae on the head that are found in A. pogonias .