Hyboptera shasta Erwin, 2017

Erwin, Terry L. & Henry, Shasta C., 2017, Hyboptera Chaudoir, 1872 of the Cryptobatida group of subtribe Agrina: A taxonomic revision with notes on their ways of life (Insecta, Coleoptera, Carabidae, Lebiini), ZooKeys 714, pp. 61-127 : 85-88

Hyboptera shasta Erwin sp. n. Shasta’s humps-backed beetle Figs 3A , 11

Holotype.

Male. Brazil, Amazonas, north of Manaus on Amazonas 010 at Km 26, Reserva Ducke, 2.918°S, 59.971°W, 70m, 4 July 1978 (J Arias)(NMNH: ADP135875).

Derivation of specific epithet.

The species epithet " shasta " is an eponym based on the first name of the coauthor of this paper and former Intern in the laboratory of the senior author of this paper at the Smithsonian Institution.

Proposed English vernacular name.

Shasta’s humps-backed beetle.

Diagnosis.

With the attributes of the genus and angulicollis species group as described above and adults without pronotal markings, pronotal surface rufotestaceous, elytron brilliant metallic green throughout with lateral margin testaceous to latero-apical corner, not quite reaching sutural apex; apical abdominal tergite mostly infuscated with narrow median testaceous stripe; size larger than H. scheelea adults.

Description.

(Fig. 3A ). Size: See Appendix 1. Length (SBL) medium for genus, ABL = 4.82 mm, SBL = 3.86 mm, TW = 2.17 mm.

Color: See diagnosis, above.

Luster: Very shiny elytra, substantially iridescent.

Microsculpture: Mostly isodiametric and slightly stretched, shallowly impressed, cells somewhat more stretched around elytral tubercles.

Head: Rugae moderately coarse, mostly transverse. Eye very large, nearly perfectly hemispheric, evenly rounded. Antenna short, barely reaching humerus. Labrum rectangulate, shallowly bilobed, anterior margin slightly emarginate. Neck finely transversely rugose.

Prothorax: Pronotum markedly broad, disc not centrally depressed, with dense transverse rugae. Lateral margins broadly explanate and obtusely angulate medially, then moderately arcuate to obtuse hind angle, base medially produced and rounded posteriorly.

Pterothorax: Normal for Agrina , fully winged. Elytron intervals 3 with 7 and 5 with 3/4 elongate unisetiferous tubercles, other intervals moderately convex, side margin broadly explanate laterally only at middle third. Elytron broad and short, slightly narrower than the pronotum at the broadest part, apex truncate, slightly rounded with distal corner broadly and obtusely rounded, disc not significantly convex, basal third slightly depressed. All interneurs well-impressed.

Legs: Femur dorso-ventrally moderately depressed, tibia coequal in length, more depressed; tarsus less than half the length of the tibia, fourth tarsomere markedly bilobed and with tarsal pad of setae.

Abdomen: Sparsely setiferous; normal ambulatory setae on sterna 3-5; female unknown; males with only the lateral pair of longer setae on sternum 6.

Male genitalia: Not investigated as only the holotype male is available, likely similar to that of H. angulicollis (Fig. 5A ).

Female genitalia: Not investigated, likely similar to that of H. lucida (Fig. 8 ).

Dispersal potential.

These beetles are macropterous and capable of flight. They are moderately swift and agile runners. The holotype was acquired in a C.D.C. light trap.

Way of life.

The single known adult was found in July in lowlands (70 m.a.s.l.) in the terra firme forests.

Other specimens examined.

None.

Geographic distribution

(Fig. 11 ). This species is currently known only from the type locality in lowland Amazonian Brazil.

Figures

Figure 3. Digital Photo-illustration. Habitus, dorsal aspect. A Hyboptera shasta Erwin, sp. n., male, ADP 135875 B Hyboptera tepui Erwin & Henry, sp. n., male, ADP 007676.

Figure 5. Digital Photo-illustration, male aedeagus in repose, dorsal, ventral, left lateral aspects. A Hyboptera angulicollis Chaudoir, ADP 007330 B Hyboptera biolat Erwin & Henry, sp. n., ADP 007443 C Hyboptera vestiverdis Henry & Erwin, sp. n., ADP 014856 D Hyboptera tiputini Erwin & Henry, sp. n., ADP 135845 E Hyboptera viridivittis Chaudoir, ADP 007601. Legend, lp, left paramere; rp, right paramere; pb, phallobase; bo, phallobase orifice; ps, phalloshaft; a, phalloapex. Scale line = 0.25 mm.

Figure 8. Digital Photo-illustration, female reproductive system dorsal and ventral aspects. Hyboptera lucida Henry & Erwin sp. n., ADP 148100. Legend, bc, bursa copulatrix; sg, spermathecal gland; sgd, spermathecal gland duct; sp, spermatheca. Dorsal aspect; lt, laterotergite; gc 1, gonocoxite 1; gc 2, gonocoxite 2, des, dorsal ensiform seta, b, base of gonocoxite 2; bl, blade of gonocoxite 2. Scale line = 0.25 mm.

Figure 11. Distribution map for known localities of Hyboptera species.