Scaphinotus (Pseudonomaretus) hoodooensis Kavanaugh and Angel, 2015

Kavanaugh, David H. & Angel, Kathleen W., 2015, A Taxonomic Review of the Northwestern Nearctic Subgenus Pseudonomaretus Roeschke 1907, including Description of the New Species Scaphinotus hoodooensis (Coleoptera: Carabidae: Cychrini) from the Bitterroot Mountains of Montana, Proceedings of the California Academy of Sciences 62 (14), pp. 381-396 : 385-389

Scaphinotus (Pseudonomaretus) hoodooensis Kavanaugh and Angel , sp. nov.

Figures 1 , 2a, 3a , 4 , 8, Pl. I

TYPE MATERIAL.— HOLOTYPE, a male, deposited in CAS, labeled: “ U.S.A., Montana, Mineral County, Bitterroot Mts., 0.5 miles N of Hoodoo Pass, 1750 m.”/ “46°58.7ʹN/ 115°0.2.0ʹW, 4 August 1996, Stop # 96-43 D. H. Kavanaugh collector”/ “ D. H. Kavanaugh collection” [orange label]/ “ HOLOTYPE Scaphinotus hoodooensis Kavanaugh and Angel 2015 ” [red label]. A total 93 paratypes (62 males and 31 females): 35 males and 13 females ( CAS, NMNH), same label data as holotype; 1 male ( CAS) labeled “ U.S.A., Montana, Mineral County , Bitterroot Range, Hoodoo Creek , 0.5 miles NW of Hoodoo Pass, 1780 m, 16 Aug. 1986, Stop #88-28 D. H. Kavanaugh collector”/ “ D. H. Kavanaugh collection” [orange label]; 26 males and 18 females ( JRL) labeled “ MT Mineral Co. 0.7 km NW of Hoodoo Pass. J.R. LaBonte 2 August 2014 ”/ “ 39.5 km SSW of Superi- or, 46.978750° N, - 115.037000° W elev. 1,791 m ” ( JRL). All paratypes also bear the following label: “ PARATYPE Scaphinotus hoodooensis Kavanaugh and Angel 2015 ” [yellow label]. Type locality. U.S.A., Montana, Mineral County, Bitterroot Mountains , 0.5 miles N of Hoodoo Pass.

ETYMOLOGY.— The specific epithet is a Latinized adjective in the masculine form based on the name of the type locality, Hoodoo Pass

RECOGNITION.— Adults of this new species are distinguished from those of other species of Pseudonomaretus by the following combination of character states: size moderate, SBL = 12.5 mm or less; dorsal surface moderately shiny; elytra with distinct metallic purple reflection; head without or with only a very faint transverse impression at level of posterior margin of eye, frontal and occipital regions more or less continuous dorsally; antennomere 4 ( Fig. 3a ) not as pubescent as antennomere 5, with only a few scattered setae or very sparse pubescence in apical half; labrum ( Fig. 2a) with lateral lobes moderate in length; male protarsomere 1 ( Fig. 4b ) with pad of adhesive setae ventrally over virtually entire ventral surface, protarsomere 4 without a pad; elytral intervals 4 and 8 with two or more discal setiferous punctures.

DESCRIPTION.— Dorsal habitus as in Fig. 1 . Medium-sized for subgenus, SBL = 10.9-12. 4 mm in males, 10.1–11. 9 mm in females. Body color black to piceous, femora and tibiae black to piceous, tarsi piceous to rufopiceous; dorsal surface moderately shiny; microsculpture of head, pronotum and elytra isodiametric, shallowly impressed, with sculpticells on head a pronotum distinctly smaller than those on elytra; elytra with distinct metallic purple reflection (more faintly visible in a few specimens), pronotum also with faint metallic blue or purple reflection in some specimens.

Head. Frons smoothly convex, without punctures or wrinkles, without or with only a very faint transverse impression at level of posterior margin of eye, frontal and occipital regions more or less continuous dorsally; one pair of supraorbital setae present, inserted just anterior to posterior margins or eyes. Genae expanded laterally as a narrow shelf in front of and below eye, with a distinct notch in the shelf in line with anterior margin of eye. Antennae ( Fig. 3a ) with antennomeres 5 to 11 densely pubescent, antennomeres 3 and 4 with sparsely scattered setae in addition to apical whorl of setae, antennomere 4 also very sparsely pubescent in apical half in some specimens. Labrum ( Fig. 2a) deeply emarginate, with four setae on apical margin between lateral lobes, lateral lobes moderate in length; labial palpomere 2 with three or more setae.

labrum labrum labrum labrum labrum

Prothorax. Pronotum slightly wider than long (ratio length to width 0.94 or less), greatest width distinctly anterior to middle, lateral margin slightly and gradually sinuate anterior to hind angles, disc smooth or very faintly wrinkled, pronotal base impunctate; hind angles moderately obtuse, angulate; one pair of midlateral setiferous pores present, inserted at medial edge of lateral groove slightly anterior to middle (one specimen seen with a second midlateral seta unilaterally); one pair of basolateral setiferous pores present, inserted distinctly anterior to hind angles at medial edge of lateral groove. Propleural suture present, propleura smooth, impunctate. Protarsi of male ( Fig. 4 ) with tarsomeres 1 to 3 markedly dilated, laterally expanded and subquadrate, with dense pads of adhesive setae over virtually entire ventral surface, tarsomere 4 narrower, triangular, without a pad of adhesive setae ventrally.

Pterothorax. Elytra with 13 regular, deeply impressed striae, striae 1 to 12 uninterrupted on disc, stria 13 partly interrupted by punctures of umbilicate series, all striae distinctly punctate, punctures moderately foveate, intervals moderately convex, intervals 4 and 8 each with two or more (three or four in most specimens) distinct, moderately foveate discal setiferous pores, those intervals catenate at discal pore insertions in most individuals; lateral margination of elytra slightly narrowed. Elytra epipleura smooth, impunctate or with only a few scattered, shallow, vaguely defined depressions. Metacoxae with anterior seta present, posteromedial seta absent.

Abdomen. Ventrite 6 with two pairs of apical paramedical setae in both males and females.

Male genitalia. Median lobe of aedeagus ( Fig. 8) moderate in thickness and of nearly equal thickness throughout, ventral margin evenly arcuate in basal three-fourths, faintly recurved dorsally in apical one-fourth in lateral aspect ( Fig. 8b), widest near midpoint of shaft length, straight, narrowed at apical one-third of shaft length, then parallel-sided in apical one-third and angularly tapered to a narrowly rounded point apically in dorsal aspect ( Fig. 8a), armature of internal sac with a heavily sclerotized tubular section at basal one-third of shaft

GEOGRAPHICAL DISTRIBUTION.— This species currently is known only from the type locality, near Hoodoo Pass , 1750–1780 m, Mineral County, Montana, U.S.A.

HABITAT DISTRIBUTION.— During daytime, adults of this species were found under loosely embedded stones and logs on the ground in the meadow/forest ecotone zone and slightly into the forest itself (Pl. I). Beetles were found walking around on the soil surface at night in the same areas.

GEOGRAPHICAL RELATIONSHIPS WITH RELATED SPECIES.— Almost all locality records for other Pseudonomaretus species are from areas to the north and west of the type locality of S. hoodooensis and all are at lower elevations. Excluding that for our new species, the only records for the subgenus from Montana are for S. merkelli and S. relictus . Both of these species have been collected in molasses-baited pitfall traps in the vicinity of Lookout Pass, Mineral County, at an elevation of 1280 m ( Russell 1968). This locality is approximately 70 km northwest of Hoodoo Pass and at an elevation about 500 m lower. Scaphinotus relictus has also been collected in Sanders County, 13 miles NE of St. Regis, at an elevation of about 800 m. This locality is about 40 km northnorthwest of Hoodoo Pass. While it is possible that the geographical ranges of S. merkelii and/or S. relictus may eventually be found to overlap with that S. hoodooensis , these species are likely restricted to elevations below the altitudinal range of S. hoodooensis and so are not likely to occur in the same habitat.

Figures

FIGURE 1. Dorsal habitus, male, Scaphinotus hoodooensis Kavanaugh and Angel sp. nov. Scale line = 1.0 mm. Ink and colored pencil drawing by Virginia (“Ginny”) Kirsch.

FIGURE 3. Digital photographs of right antenna, antennomeres 1 to 5, of Scaphinotus (Pseudonomaretus) species, dorsal aspect, with antennomeres identified by number; a, S. hoodooensis Kavanaugh and Angel sp. nov. (near Hoodoo Pass, Mineral County, Montana); b, S. merkelii (G. Horn) (St. Joe National Forest, Idaho); c, S. regularis (LeConte) (Hayden Creek, Kootenai County, Washington); d, S. relictus (G. Horn) (Selway River at O’Hara Campground, Idaho County, Idaho); e, S. mannii Wickham (Steptoe Canyon, Whitman County, Washington). Scale lines = 1.0 mm.

FIGURES 4–7. Digital photographs of male left protarsus of Scaphinotus (Pseudonomaretus) species, with tarsomeres identified by number; a, dorsal aspect; b, ventral aspect; as = pad of adhesive setae. Fig. 4. S. hoodooensis Kavanaugh and Angel sp. nov. (near Hoodoo Pass, Mineral County, Montana). Fig. 5. S. merkelii (G. Horn) (9 km SE of Lowell, Idaho County, Idaho). Fig. 6. S. relictus (G. Horn) (Selway River at O’Hara Campground, Idaho County, Idaho). Fig. 7. S. mannii Wickham (Steptoe Canyon, Whitman County, Washington). Scale lines = 1.0 mm.