Eustrophopsis arizonensis (Horn, 1888)

Pollock, Darren A., 2012, Review of the Eustrophinae (Coleoptera, Tetratomidae) of America north of Mexico, ZooKeys 188, pp. 1-153 : 21-24

Eustrophopsis arizonensis (Horn, 1888) Figures 922344652607276

Eustrophus arizonensis Horn 1888: 34.-("occurs in Arizona and New Mexico"); Champion 1889: 75; Henshaw 1889: 131; Horn 1894: 353; Wickham 1895: 168; Champion 1898: 65; Griffith 1900: 570.

Eustrophinus arizonensis (Horn).- Leng 1920: 238; Csiki 1924: 8; Blackwelder 1945: 495; Poole and Gentili 1996: 299.

Eustrophopsis arizonensis (Horn).- Pollock 2008: 290.

Diagnosis.

This distinctive species may be diagnosed on the following combination of features: eyes moderately widely separated; prothoracic episterna with distinctly ru gose macrosculpture; meso- and metatibiae with oblique ridges; distribution: western United States.

Description.

TL 5.8-7.8 mm; GEW 2.6-3.6 mm. Body ovate (Fig. 9), slightly tapered posteriorly, moderately convex dorsally (Fig. 22); dorsal color uniform, piceous to near black; ventral color lighter than dorsal: venter rufous; legs, mouthparts and antennomeres 1-4 and 11 light to dark rufous; dorsal vestiture uniform, setae relatively short; eyes moderately widely separated dorsally (Fig. 34), distance between eyes greater than maximum width of antennomere 1; antennomeres 5-10 moderately wide, submoniliform, antennal sensilla annular; antennomeres 5-10 of male not flattened ventrally, without “accessory” setae; last maxillary palpomere somewhat widened distally, apex oblique; prosternal process (Fig. 46) acute, narrowly rounded distally, not reaching posterior margin of procoxae; coarse elytral punctation forming longitudinal striae; prothoracic episternal suture present, punctation of surface of proepisternum anterior of suture somewhat obscured by very coarse, rugose macrosculpturing; meso- and metatibiae with multiple, oblique ridges; male with small, ovate, setiferous pit on ventral edge of profemur; aedeagus (Fig. 60) with basal piece of tegmen slightly longer than apical piece; struts on median lobe elongate, inner margins subparallel to elongate oval; sternite 9 basally V-shaped.

Distribution

(Figures 72, 76). Eustrophopsis arizonensis is one of the most widespread species in the subfamily, when the Mexican distribution is included. Specimens are known from northern United States (southeast Montana) south to Oaxaca, Mexico. The 516 individuals examined are from the following: MEXICO: DURANGO, MORELOS, OAXACA, SONORA. UNITED STATES: ARIZONA: Apache, Cochise, Coconino, Gila, Graham, Navajo, Pima, Pinal, Santa Cruz, Yavapai. CALIFORNIA: Riverside, San Bernardino. COLORADO: Douglas, La Plata. MONTANA: Powder River. NEW MEXICO: Catron, Cibola, Grant, Hidalgo, Lincoln, Los Alamos, San Miguel, Torrance. SOUTH DAKOTA: Fall River. TEXAS: Brewster, Jeff Davis. UTAH: Washington. (Complete label data given in Appendix 1).

Types.

Eustrophus arizonensis Horn. LECTOTYPE, sex unknown, labeled "Ariz / LectoTYPE 8038 / E. arizonensis Horn / MCZ Type 34038", in MCZ. Paralectotypes (3) in MCZ.

Natural history.

Label data: under bark, Quercus (MX), under bark (AZ, MX), under pine bark (AZ), ex. fungi (AZ), dead oak at night (AZ), under log (AZ), pine stump (CA).

Notes.

The rugose nature of the prothoracic episterna of this species seems to be unique in the genus, perhaps in the entire subfamily. The Mexican specimens have been included in Eustrophopsis arizonensis , based on possession of this feature.