Eustrophopsis crowdyi, Pollock, Darren A., 2012

Pollock, Darren A., 2012, Review of the Eustrophinae (Coleoptera, Tetratomidae) of America north of Mexico, ZooKeys 188, pp. 1-153 : 27-29

Eustrophopsis crowdyi sp. n. Figures 122436486274

Types.

HOLOTYPE, male, labeled: "AZ, Cochise Co., Turkey Crk, 31°51.280'N, 109°19.883'W, 14.vii.02 ex. WPB-baited Lindgren funnel trap, ca. 2000 m. / HOLOTYPE ♂ Eustrophopsis crowdyi Pollock" (in USNM). ALLOTYPE, female, with same label data as holotype, except "ALLOTYPE ♀ Eustrophopsis crowdyi Pollock" (in USNM). Four male and 2 female paratypes, same label data as holotype; 5 male and 4 female paratypes, labeled: "AZ, Cochise Co., Turkey Crk, 31°51.280'N, 109°19.883'W, 7.vii.02 ex. WPB-baited Lindgren funnel trap, ca. 2000m. / near XPB-infested Chihuahua pine B. Fitzgibbon, coll."; 1 male and 1 female paratypes, labeled: "USA, AZ, Apache Co., Apache N.F., Luna Lk cmpgrd, ca. 5 mi. E. Alpine, 33°50'04"N, 109°05'03"W; 22.vi.2002 / collected at night under ponderosa pine bark, 7960ft. D.A. Pollock". (Paratypes in CASC, CUIC, DAPC, MTEC, UAIC, USNM)

Diagnosis.

Individuals of Eustrophopsis crowdyi may be diagnosed from other species of Eustrophopsis on the following characters: overall dark body color; eyes not approximate dorsally; males with short antennal sensilla; prosternal process rather blunt, rounded distally. As mentioned above for Eustrophopsis ornatus , that species and Eustrophopsis crowdyi are thought to be close relatives, based on the modified antennomeres of the males.

Description.

TL 5.6-7.9 mm; GEW 2.5-3.5 mm. Body elongate oval, relatively narrow, moderately tapered posteriorly (Fig. 12), moderately convex dorsally (Fig. 24); entire body piceous to nearly black, except for antennomeres 1-4 and tip of antennomere 11 somewhat lighter in color, very dark rufous.

Head with uniformly spaced, relatively coarse punctation; eyes (Fig. 36) deeply emarginated around antennal insertions, separated dorsally by distance approximately equal to maximum width of first antennomere; antennomeres 5-10 (Fig. 36) distinctly widened in both sexes, and with different microsculpturing than antennomeres 1-4; antennomeres 7-10 subquadrate, wider than long; male with antennomeres 5-11 flattened on ventral side, ventral surface of antennomeres 5-10 with short, slender “accessory” setae (sensilla); distal maxillary palpomere not widened distally, subparallel-sided, apex slightly oblique.

Pronotum with uniform, shallow punctation and short, apressed brownish setae; posterior margin with two clusters of coarser punctures, equidistant between middl e and lateral margins; posterior margin of pronotum bisinuate, inner sinuation deeper than outer; bead distinct along lateral, anterior, and posterior margins, somewhat obscured on middle lobe of posterior margin; prothoracic episternal suture present; surface of proepisterna smooth, regularly punctuate, without coarse or rugose macrosculpture; prosternal process (Fig. 48) moderately elongate, not attaining posterior margin of procoxae, apex moderately broadly rounded; mesosternum short, distinctly keeled.

Elytra elongate, slightly convex; punctation of two types: coarse punctures forming 10 striae on each elytron; other punctures finer, setose, setae uniformly distributed, decumbent; epipleuron distinct, narrowed posteriorly, but traceable to elytral apex; flight wings full, functional, membrane darkly pigmented.

Legs all relatively similar in shape; metathoracic legs more elongate than meso- or prothoracic legs; all tarsi cylindrical, without ventral lobes; outer surfaces of meso- and metatibiae with numerous, oblique ridges; tibial spurs distinct, paired; tarsal claws slender, without basal tooth or expansion; male profemur with small, ovate, setiferous pit on ventral surface, approximately ¼ to 1/3 distance from base of femur.

Abdominal ventrites with uniform, relatively coarse punctation, setae decumbent; male genitalia darkly pigmented (Fig. 62) with apical and basal piece of tegmen subequal in length; struts on median lobe elongate, relatively narrow, inner margins V-shaped; sternite 9 basally Y-shaped, with long stem.

Distribution

(Fig. 74). This species is known only from the type locality, in southeastern Arizona. UNITED STATES: ARIZONA: Cochise.

Natural history.

All known specimens, except two, were collected using Lindgren funnel traps baited with western pine beetle ( Curculionidae : Scolytinae ) attractant; some specimens were labeled as having been collected near a scolytine-infested Chihuahua pine ( Pinus leiophylla ). Two specimens were collected at night under ponderosa pine bark.

Derivation of specific epithet.

I am very pleased to be able to name this new species after my oldest son, George “Crowdy” Pollock, who has accompanied me on many collecting expeditions and who has made many interesting discoveries along the way. In fact, he found larvae and adults of Eustrophopsis indistinctus in a neighbor’s fungus-colonized birch ( Betula ) stump, which were the first specimens of that species I had seen from New Mexico.

Notes.

Eustrophopsis crowdyi shares with Eustrophopsis ornatus conspicuously sexually dimorphic antennae, in males with a widening of antennomeres, one side of which is flattened and with setiform sensilla. While certainly not all world species of Eustrophinae have been studied in detail, this antennal modification is unique (so far) to these two species. As mentioned above, specimens of Eustrophopsis crowdyi were collected with many specimens of Eustrophopsis arizonensis and Eustrophopsis ornatus at the same locality in Cochise County, Arizona.