Hippeutister solisi Caterino & Tishechkin

Caterino, Michael S. & Tishechkin, Alexey K., 2008, A review of Hippeutister Reichensperger with new species from California and Costa Rica (Coleoptera: Histeridae: Hetaeriinae), Zootaxa 1895, pp. 39-52 : 43-45

Hippeutister solisi Caterino & Tishechkin , n. sp.

( Figs. 1 B, 2B, 3B, 3D, 4B, 5B, 6C, 7B, 8B)

Type material: Holotype female: “Cano Negro, 20m, R.N.V.S. Cano Negro, Prov. Alajuela, Costa Rica, 4 a 17 dic 1992, K. Flores, L-N 319100, 450200”/” INBIO CRI 000911827”, INBIO.

Diagnosis: This species is most similar to the other new species, H. californicus , being only slightly larger in size, similar in body shape, and in being somewhat setose. This species is easily distinguished by lacking dorsal setae on the pronotum and elytra, but with dense setae on the margins (the epipleuron in the latter) of both ( Fig. 8 B).

Description: L: 2.83; W: 2.49; E/Pn L: 1.76; E/Pn W: 1.19; Pn W/L: 2.03; E L/W: 0.73; Pr/Py: 1.00; Sterna: 0.78, 0.28, 0.62; Tibiae: 0.72, 0.75, 0.84 (n=1). Body rufescent ( Fig. 1 B), moderately convex ( Fig. 8 B), rounded ( Fig. 4 B), widest just behind humeri. Frons ( Fig. 7 B) with about 40 fine setose punctures randomly scattered, these slightly more dense near vertex, and almost absent from epistoma; epistomal carinae well developed, sinuate over antennal bases, extending obliquely to ocular carina, both bearing denser fringe of setae; clypeolabral suture not evident; labrum truncate, bearing few discal and apical setae; mandibles finely setose on lateral surfaces.

Prothorax ( Fig. 5 B) widest at base, converging strongly and weakly sinuately to obliquely trunctate anterior angles; pronotal marginal stria present, extending to anterior corner; lateral pronotal stria close to marginal, extending around anterior angle along anterior margin, interrupted briefly behind head where a short tangential discal stria replaces it; lateral margin of pronotum with short, dense fringe of setae between marginal and lateral striae; disc of pronotum obliquely depressed along sides, faintly explanate, glabrous, smooth, with faint, shallow but broad punctures in front of scutellum. Prosternal keel ( Fig. 6 C) broad, bearing a few setae; prosternal lobe short, not produced at middle, with moderately dense setose punctures near anterior margin.

Elytra convex, lacking dorsal striae ( Fig. 4 B), though with very faint oblique impressions near base, disc glabrous, with broad, shallow punctures near scutellum, and finer, denser ones extending posterad along suture; epipleuron margined dorsally by complete carinate stria and with less prominent subdorsal and lateral striae, the entire epipleuron finelly setose, especially on and immediately below striae ( Fig. 8 B).

Mesometasternal suture only faintly indicated at middle ( Fig. 6 C); mesosternum projecting strongly into triangularly incised base of prosternal keel, with fine marginal stria continuous with complicated array of several oblique lateral mesometasternal striae; metasternal disc with numerous rather deep setose pits anteromedially, becoming finer and sparser posteriorly; lateral portions of metasternal disc with more numerous but finer setose punctures lining and between the lateral striae. First visible abdominal sternite with sparse moderately deep setose pits particularly near anterior margin, with finer but denser setose punctures laterally, between and mediad the two oblique lateral striae.

Profemora ( Fig. 8 B) very broad, nearly square, margined along anterior and posterior edges, with setose punctures on ventral (posterior) face; protibia broad, rounded, subangulate near base, with series of fine spines along apical two-thirds of margin; meso- and metafemora short, with anterior and posterior margins rounded, with marginal and anterior submarginal striae on ventral (anterior) face, finely setose throughout; meso- and metatibiae more rounded laterally, slightly narrowed to apex, lacking marginal spines, with complete marginal striae and bearing fine setae on outer face; tarsomeres 1–4 bearing pair of apicoventral setae; pretarsal claws straight.

Propygidium flat to weakly impressed across base, notably convex along apical margin, bearing striae along anterolateral margins extending just around anterolateral corners, disc with fine setose punctures throughout; pygidium ( Fig. 3 D) faintly depressed along posterolateral margins, with fine setose punctures throughout.

Distribution: This species is only known from the type locality, in Alajuela province, north central Costa Rica ( Fig. 2 B). There is no host data associated with the specimen.

Remarks: We name this species for Angel Solís, of the Instituto Nacional de Biodiversidad in Costa Rica, in recognition of his efforts to advance knowledge and conservation of Costa Rican Coleoptera .

Figures

FIGURE 1. Dorsal habitus photographs and drawing. A. Hippeutister californicus, n. sp. B. H. solisi n. sp. C. H. castaneus (Lewis). D. H. manicatus (Lewis). E. H. plaumanni Reichensperger. F. H. amabilis (Wenzel) (scanned from original).

FIGURE 2. Type localities of the new species. A. Hippeutister californicus. B. H. solisi

FIGURE 3. SEM photographs. A. mouthparts of Hippeutister californicus. B. Antenna of H. solisi. C. Pygidium of H. californicus. D. Pygidium of H. solisi.

FIGURE 4. Dorsal SEM photographs showing elytra. A. Hippeutister californicus. B. H. solisi, C. H. castaneus. D. H. manicatus.

FIGURE 5. Dorsal SEM photographs showing pronota. A. Hippeutister californicus. B. H. solisi, C. H. castaneus. D. H. manicatus.

FIGURE 6. Ventral SEM photographs showing sterna. A, B. Hippeutister californicus. C. H. solisi, D, E. H. castaneus. F. H. manicatus. G. H. plaumanni.

FIGURE 7. Anterior SEM photographs showing frons. A. Hippeutister californicus. B. H. solisi, C. H. castaneus. D. H. manicatus.

FIGURE 8. Lateral SEM photographs. A. Hippeutister californicus. B. H. solisi, C. H. castaneus. D. H. manicatus.