Hyboptera scheelea Erwin & Henry, 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

Hyboptera scheelea Erwin & Henry sp. n. Palm-frond humps-backed beetle Figs 2B , 11

Holotype.

Female. Perú, Loreto, Pacaya-Samiria National Reserve, Río Samiria (South Branch), Camp Terry, 5.6951°S, 75.2243°W, 129m, 14 May 1990 (TL Erwin)(NMNH: ADP007575).

Derivation of specific epithet.

The species epithet " scheelea " is used as a noun in apposition which is based on the genus of palm upon which the holotype was found.

Proposed English vernacular name.

Palm-frond 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 blackish-blue with metallic green highlights across the humeri and green points at some larger tubercles with lateral margin narrowly testaceous to latero-apical corner but not reaching sutural apex. Apical abdominal tergite mostly infuscated with narrow median testaceous stripe. Size smaller than H. shasta adults.

Description.

(Fig. 2B ). Size: See Appendix 1. Length (SBL) short for genus, ABL = 4.54 mm, SBL = 3.68 mm, TW = 2.10 mm.

Color: See diagnosis, above.

Luster: Metallic highlights, partially iridescent.

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

Head: Rugae moderately coarse, mostly transverse. Eye very large, sub-hemispheric, evenly rounded anteriorly, subtly more prolonged posteriorly. Antenna short, barely reaching humerus. Labrum rectangulate, shallowly bilobed, anterior margin slightly emarginate. Neck finely and transversely rugose.

Prothorax: Pronotum markedly broad, disc 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 and 5 each with (4)5 discal unisetiferous tubercles, interval 3 with one such tubercle near apex, 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 with two pairs of ambulatory setae on sternum 6, medial pair of setae less than the length of lateral pair; males unknown.

Male genitalia: Unknown.

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

Dispersal potential.

These beetles are macropterous and probably capable of flight. They are moderately swift and agile runners. The holotype was acquired by insecticidal fogging of a Sheelea palm.

Way of life.

The single known adult was found in May in lowlands (129 m.a.s.l.) in the secondary floodplain of igapó forests.

Other specimens examined.

None.

Geographic distribution

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

Notes.

The holotype will be deposited in UNMSM and is currently held in trust until the completion of studies at NMNH.

Figures

Figure 2. Digital Photo-illustration. Habitus, dorsal aspect. A Hyboptera vestiverdis Henry & Erwin, sp. n., female, ADP 007334 B Hyboptera scheelea Erwin & Henry, sp. n., female, ADP 007575.

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.