Mastogenius arizonicus, Bellamy, C. L., 2002

Bellamy, C. L., 2002, The Mastogenius Solier, 1849 of North America (Coleoptera: Buprestidae: Polycestinae: Haplostethini), Zootaxa 110, pp. 1-12 : 2-4

Mastogenius arizonicus , sp. nov.

Figures 1, 2, 3

Description of holotype (habitus Figure 1 ). Small, length 3.9 mm, width 1.2 mm, widest athumeri; body elongate­ovoid, subcylindrical, flattened above and below; coarsely, shallowly punctate, dorsal surface black with purplish reflection, ventral surface black with faint aeneous reflection; dorsal surface sparsely covered with fine, short, semi­erect white setae, setae on ventral surface recumbant; antennomeres with short, erect setae sparsely, irregularly positioned around entire surface of each. Head with slight medial depression on frontovertex; eyes of moderate size, with inner margins slightly converging dorsad; clypeal margin arcuate; antennal insertions widely separated; antennomere 2, short, globose, 3 shorter than 2, slender, 4­10 elongate triangular, length of each about 3x maximum width; 11 oblong; length of antennae, when laid alongside body, extending to basal third of elytra; pronotum with anterior margin very feebly arcuate, posterior margin evenly transverse, lateral contour broadly arcuate, widest at midpoint; lateral margin entire, sinuate when viewed laterally, supra­lateral margin extending from posterior margin to about anterior 1/6; disc flattened; scutellum triangular, slightly longer than wide, depressed medially; elytra slightly wider at humeri than pronotum, beyond rounded anterior angle, sides subparallel to about posterior 1/3, then narrowing gradually to separately rounded and attenuate apices; disc transversely convex, with one small, irregular depression on either side at posterior 1/3; epipleura extending posteriad broadly from anterior margin to opposite metacoxa; prosternum with very feeble bilobed anterior margin; prosternum with very feeble bilobed anterior margin; prosternal projection slightly constricted between procoxae, distal margin attenuate; metacoxal plate with posterior margin arcuate, concave; abdominal ventrites with 1 as long as 2+3+4, 2 longer than 3, 3 and 4 subequal, 5 slightly longer than 4, very broadly convex; legs with femora narrowly fusiform, subequal to tibiae; fore­ and mesotibiae each with one pair short testaceous apical spines; metatibiae with comb of stout setae on external face; tarsi with ventral pulvilli on tarsomeres 3, 4; pulvillus on 3, very short on distal margin; pulvillus on 4, elongate, distally expanded, extending beyond distal margin; 5 elongate, claws simple; the left mesotarsus is mounted to the card with the specimen, the left metatarsomere 5 is missing; male genitalia ( Figure 3 ) short, testaceous, parameres attenuate distally, median lobe with strong lateral teeth, one on each side, apex triangular.

Variation. The allotype ( Figure 2 ) differs from the holotype: Length 4.1 mm, width 1.4 mm; antennae much shorter, extending only to posterior margin of pronotum when laid alongside; each triangular antennomere proportionally shorter than in male, each length about 2x width.

Specimens examined. Holotype (LACM): U.S.A. Ariz[ona], Pima Co., Santa Catalina Mts. , Oracle­Mt. Lemmon Road, vic. Marble Peak, N32E27'46", W110E43'53", 28.iv.2001, 1800 m, C.L.Bellamy, beating dead branches of Quercus hypoleucoides Camus ; allotype (CLBC): same data as holotype.

Etymology. The specific epithet is for the American state of Arizona, where the type locality is located.

Remarks. This new species can be separated from its congeners as indicated in the following key and comes nearest to M. texanus , n. sp., discussed below. Although it would be better to await the collection of additional specimens, the general vicinity around the type locality was destroyed in the so­called Bullock fire of 2002, which burned some 30,000 acres of habitat, and was one of the only areas on the northern slopes of the Santa Catalina mountains accessible by graded roads.

1 3 4 6

Figures

FIGURES 1 - 6. 1 - 3. Mastogenius arizonicus, n. sp. Figure 1, male holotype, dorsal habitus; Figure 2, female allotype, dorsal habitus; Figure 3, male aedeagus, dorsal aspect. 4 - 6. Mastogenius texanus, n. sp. Figure 4, male holotype, dorsal habitus; Figure 5, female allotype, dorsal habitus; Figure 6, male aedeagus, dorsal aspect. Scale bars = 1.0 mm for Figures 1, 2, 4, 5 and 0.5 mm for Figures 3 and 6.