Ochthephilus biimpressus ( Mäklin, 1852 )

Makranczy, György, 2014, Revision of the genus Ochthephilus Mulsant & Rey, 1856 (Coleoptera: Staphylinidae, Oxytelinae), Revue suisse de Zoologie 121 (4), pp. 457-694 : 529-536

Ochthephilus biimpressus ( Mäklin, 1852) Figs 10, 154-158, 205, 429, 524

Phloeonaeus biimpressus Mäklin, 1852: 319 .

Ancyrophorus biimpressus (Mäklin) . – LeConte, 1877: 242. – Jarrige, 1949: 61. – Hatch, 1957: 91.

Ochthephilus biimpressus (Mäklin) . – Herman, 1970: 384. – Downie & Arnett, 1996: 441.

TYPE MATERIAL EXAMINED: Phloeonaeus biimpressus – LECTOTYPE (here designated): “ Type; H. T. [red margined round disc, curator label] \ 62 (or 69??) \ 54; 33 [Alaska, Baranof Island (Sitka Co.) *+54.09/-135.00*] \ Phloeonaeus; biimpressus; Mäklin \ Lectotypus; Phloeonaeus; biimpressus Mäklin ; (on the back) des. Makranczy, 1999 \ Ochthephilus ; biimpressus Mäklin ; det. Makranczy, 1999” ( BMNH).

OTHER MATERIAL: see Appendix.

REDESCRIPTION: Habitus as in Fig. 429, forebody as in Fig. 524. Measurements (n=10): HW = 0.59 (0.56-0.62); TW = 0.55 (0.52-0.60); PW = 0.67 (0.64-0.71); SW = 0.77 (0.73-0.82); AW = 0.90 (0.83-1.04); HL = 0.45 (0.41-0.48); EL = 0.17 (0.16-0.18); TL = 0.12 (0.11-0.13); PL = 0.53 (0.50-0.57); SL = 0.88 (0.84-0.94); SC = 0.80 (0.75- 0.85); FB = 1.93 (1.84-2.08); BL = 3.55 (3.23-4.02) mm. Head black, abdomen dark brown with reddish tint. Pronotum dark brown turning to reddish medium brown around the edges, sometimes whole dorsal surface lighter, slightly orangeish at spots. Elytra reddish medium to dark brown, occasionally lighter from shoulders along outer margin to hind edge (leaving centre of disc and scutellar area somewhat darker. Legs reddish medium to dark brown, basal antennomeres often lighter, medium brown. Body rather shiny due to sparse elytral setation and large, smooth puncture interspaces. Pubescence rather fine and moderately dense, shorter and stronger (regularly spaced) on elytra, abdominal tergites with finer and longer setae, especially adjacent to laterosternites. Head anteriad eyes and near inner posterior margin of eye with stronger and darker bristles, as well as pronotal margin and middle of tibiae. Elytral apex without conspicuous setae. Last tarsomere with a few setae only.

Forebody. Antenna as in Fig. 429. Clypeus almost impunctate (colliculate microsculptured), trapezoid, corners rounded, anterior edge gently arched; separated by impressed transversal line (frontoclypeal suture) across a shinier area. Supraantennal prominences well developed, feebly separated from clypeus/vertex by impressions. Vertex with oblique impressions in middle almost joining in V-shape. Temples bulging, evenly curved, significantly longer than half of eye length. Neck separated by an impressed transversal groove, microsculpture much stronger than on head, with transverse cells, no setation. Pronotum with a narrow marginal bead, visible to anterior pronotal corners. Posterior pronotal angles well-formed, just slightly obtuse-angled, sides in posterior 2/3 very gently concave. 'Anchor' fully formed, longitudinal midline as a slightly elevated, impunctate, weakly microsculptured line, parallel to this line two gentle, semi-longitudinal elongate elevations in anterior half of disc. In corners of anchor feeble, oblique impressions directed outwards, in middle at sides of midline two smaller impressions. Elytra slightly broadening posteriorly, sutural corners narrowly rounded; apical sides slightly oblique and in inner halves more or less straight. Elytral surface rather even with two shallow, very elongate impressions behind scutellum. Head with fine coriaceous/colliculate microsculpture, fading on elevated parts, stronger in impressions, on pronotum microsculpture slightly stronger and more even. Punctation on head sparse, mostly confined to posterior part and sides, on pronotum more evenly spaced, average interspaces much larger than puncture diameters; elytral punctation more even and regularly spaced, average interspaces (with indistinct coriaceous microsculpture) about as puncture diameters, punctures discrete.

Abdomen. Compared to forebody, abdomen with much more sparse, finer, less distinct punctation, microsculpture on tergal apices fine coriaceous with moderately transverse cells. Tergite VII posterior margin with palisade fringe unmodified in middle (nearly uniform breadth). Tergite VIII (Fig. 205) basal edge evenly arched, with small concavity in middle of basal sclerotized band; apical edge with sinuate (protruding) corners, and broad, moderately deep emargination in between. Sternite VIII with rounded apical corners, apex in males shallowly concave laterally, gently sinuate in middle; in females slightly more sinuate (convex) in middle. Tergite X unmodified, apex very slightly wider in males than in females. Aedeagus as in Fig. 154, inner sclerites as in Figs 155-156. Female ringstructures as in Figs 157-158.

COMPARATIVE NOTES: This taxon cannot be confused with any other, by its unique reddish coluration, rather large size and extremely transverse middle antennomeres. As a rather shiny species it is somewhat similar to O. flexuosus , but the lateral pronotal margins are much less sinuate.

DISTRIBUTION: Known from mostly from the Pacific Coast Ranges in North America, but not only, it is also found in the Rocky Mountains on the more northern/higher locations. Bound to forested areas.

BIONOMICS: Collected most frequently from wet mosses on rockface at edge of stream, along waterfalls but also on forest floor, around logs. Also found by sifting leaflitter (mostly deciduous trees like alder, cedar, maple, oak, but exceptionally also conifers). Sometimes encountered in dung and rotting mushrooms. Labels indicate wet, shaded, cold environments, even the edge of snowmelt.

Ochthephilus brachypterus ( Jeannel & Jarrige, 1949) Figs 11, 189-193, 203, 532, 563 Ancyrophorus brachypterus Jeannel & Jarrige, 1949: 327 .

Ochthephilus brachypterus (Jeannel & Jarrige) . – Herman, 1970: 384. – Makranczy, 2001: 179.

TYPE MATERIAL EXAMINED: Ancyrophorus brachypterus – HOLOTYPE: “[red square] \ p. [Peştera] Gârla vachi; 1322 [11.]VI.28 [Runcu, jud. Gorj] \ Type \ brevipennis; nsp. \ brachypterus; Jeann. Jarr. \ Holotypus; Ancyrophorus ; brachypterus Jeann. & Jarr. \ Ochthephilus ; brachypterus Jeann. & Jarr. ; det. Makranczy, 1999” ( MNHP).

OTHER MATERIAL: AUSTRIA: Kärnten, Trögern, Potokgrab. *+46.44/+14.49*, 26.VI- 4.VII.1987, leg. Siede & Wunderle, coll. Wunderle (1♀), HNHM (1). – Kärnten, Zell-Pfarre *+46.47/+14.39*, 15.VII.1965, coll. Assing (13). – Tirol, Lienzer Dolomiten, Kerschbaumer Alm *+46.76/+12.77*, 13-19.VII.1949, leg. F. Schubert, NHMW (1). — SLOVAKIA: Vysoké Tatry, Vyšná Závrat' v Garajovej doline, 1350m *+49.19/+19.99*, 03.VII.1996, leg. T. Jászay, pot. v machu pot., SMBC (1). – Vysoké Tatry, Kôprová dolina, Vyšná Závrať, 1400m *+49.19/ +20.00*, 15.VII.1999, leg. Gy. Makranczy, HNHM (13, 1♀). – Vysoké Tatry, Kôprová dolina, Vyšná Závrať, 1450m *+49.19/+20.00*, 16.VII.1999, leg. Gy. Makranczy, HNHM (1f). – Vysoké Tatry, Kôprová dolina, Kôprovský potok, v machových nárastoch na vode, 1200-1300m *+49.19/+19.99*, 16.VII.1999, leg. T. Jászay, SMBC (13). – Vysoké Tatry, Kôprová dolina, Kôprovský potok near Kmet'ov vodopád, 1200m *+49.18/+19.99*, 16.VII.1999, leg. Gy. Makranczy, from wet moss, HNHM (2♀). – Ždiar, Monkova dolina, 1500m *+49.26/+20.23*, 31.VII.2009, leg. M. Mantič, Pinus mugo, moss on stones in brook, coll. Mantič (2). – Tatranská Javorina - Zadné Medodoly , Med'odolský potok, 1400m *+49.23/+20.19*, 13.IX.2009, leg. M. Mantič, moss on stones in brook, coll. Mantič (3). — ROMANIA: jud. Hunedoara, P.N. Retezat ,

FIGS 234-248

(234-238) Ochthephiluscolumbiensis (Hatch); aedeagus (234), innersclerites (235-236), female ringstructures (237-238). (239-243) O. angustior (Bernhauer) ; aedeagus (239), innersclerites (240-241), femaleringstructures (242-243). (244-248) O. wunderlei sp. n.; aedeagus (244), inner sclerites (245-246), femaleringstructures (247-248). Scalebar = 0.04 mmfor 237-238, 0.05 mm for 247-248, 0.06 mmfor 242-243, 0.085 mmfor 239-241, 0.1 mmfor 244-246, 0.13 mmfor 234-236.

GuraBucurei , streamPeleaga, 45°20'N, 22°54'E, 1600m, 30.V.2002, Gy. Makranczy, from streambank sand and fine gravel, flotation, HNHM (2) . – jud. Covasna, 5km NNE Comandǎu , streamBâscaMare, shadyconfluencewithsmallerstream, 45°48'49"N, 26°18'40"E, 1160m, 18.V.2003, Gy. Makranczy (18), flotation from wet but not overflown mosses, HNHM (1) . – jud. Bistriţa-Nǎsǎud, Munţii Rodnei, stream Bistriţa Aurie , nr. L. Izv. Bistriţei, 5km SW Pasul Prislop, 47°34'40"N, 24°48'51"E, 1650m, 13.VI.2003, Gy. Makranczy (47), fromcattledungon pasture and mosses in crossing stream, HNHM (7) . – jud. Argeş, Munţii Fǎgǎraş , rocky slope at bridgeonstreamCapra, 2kmSSELacBîlea, 45°35'03"N, 24°38'23"E, 1630m, 15.VI.2003, leg. Gy. Makranczy (57), from overflown and wet moss on rocks, flotation, HNHM (3) . – jud. Dâmboviţa, Munţii Bucegi, forested part of Ialomiţa in Cheile Ursilor, under Piciorul Babelor , 45°23'59"N, 25°26'34"E, 1620m, 18.VII.2004, leg. Gy. Makranczy (137), frommoss, debrisand gravel at small cascades, flotation, HNHM (2) . – jud. Dâmboviţa, Munţii Bucegi, stream IalomiţaunderPadina , 0.8 kmSSchitulPeştera, 45°23'19"N, 25°26'05"E, 1490m, 18.VII.2004, leg. Gy. Makranczy (139), from moss and plant debris on shaded bank, flotation, HNHM (4) , MGAB (2) . – jud. Hunedoara, Munţii Retezat, Gura Bucurei, under bridge on p. Peleaga at p. Bucuraconfluence , 45°20'19"N, 22°53'37"E, 1600m, 3.VI.2008, leg. Gy. Makranczy (372), fast stream, fine gravel spot between rocks, flotation, HNHM (2) . – jud. Hunedoara, Munţii Retezat, GuraBucurei, canyonofp. Peleaga 0.2kmEp. Bucuraconfluence , 45°20'18"N, 22°53'44"E, 1600m, 3.VI.2008, leg. Gy. Makranczy (374), from mosses on big rocks in fast stream, flotation, HNHM (10) , MGAB (3) . – jud. Bistriţa-Nǎsǎud, MunţiiRodnei, p. BistriţaAurie, 0.5kmdownstreamofL. IzvoruBistriţei , 47°34'40"N, 24°49'00"E, 1600m, 23.VI.2008, leg. Gy. Makranczy (381), cascaded part, mosses, plant debris in stream, flotated, HNHM (2) . – Siebenbürgen, Kerzergebirge [MunţiiFǎgǎraş] *+45.63/+24.61*, leg. Deubel, coll. Bernhauer, FMNH (1♀) .

REDESCRIPTION: ForebodyasinFig. 532. Measurements (n=10): HW = 0.64 (0.60-0.68); TW = 0.60 (0.56-0.62); PW = 0.76 (0.72-0.81); SW = 0.89 (0.82-0.94); AW = 1.01 (0.92-1.10); HL = 0.49 (0.46-0.53); EL = 0.17 (0.15-0.19); TL = 0.125 (0.11-0.14); PL = 0.61 (0.56-0.65); SL = 1.07 (0.96-1.18); SC = 0.97 (0.86-1.06); FB = 2.25 (2.12-2.42); BL = 4.03 (3.66-4.50) mm. Headalmostblack, pronotumand abdomen blackish dark brown with occasional reddish tint. Elytra slightly reddish dark brown, as well as mouthparts, legs and antennae. Body appearing rather dull, especially head and pronotum with fine but very strong microsculpture. Pubescence extremely fine and moderately dense, shorter and stronger (regularly spaced) on elytra, abdominal tergites with fine and much longer setae on apices. Head anteriad eyes and near inner posterior margin of eye with stronger and darker bristles, as well as pronotal margin and middle of tibiae. Elytral apex with 2-3 conspicuously longer setae near sutural corners. Last tarsomere with a few setae only.

Forebody. Antenna as in Fig. 563. Clypeus almost impunctate (colliculate microsculptured), trapezoid, corners rounded, anterior edge gently arched; separated by impressed transversal line (frontoclypeal suture) across a shinier area. Supraantennal prominences well developed, feebly separated from clypeus/vertex by impressions. Vertex with oblique impressions in middle almost joining in V-shape. Temples slightly bulging, evenly curved, significantly longer than half of eye length. Neck shiny, separated only by a weakly impressed transversal groove, no setation. Pronotum with a narrow marginal bead, visible to anterior pronotal corners. Posterior pronotal angles well-formed, just slightly obtuse-angled, sides in posterior 2/3 very gently concave/bisinuate. 'Anchor' fully formed, longitudinal midline as a slightly elevated, impunctate, weakly microsculptured line, parallel to this line two gentle, semi-longitudinal elongate elevations in anterior half of disc. In corners of anchor feeble, oblique impressions directed outwards, in middle at sides of midline two smaller impressions. Elytra slightly broadening posteriorly, sutural corners narrowly rounded; apical sides slightly oblique and in inner halves more or less straight. Elytral surface rather even with two shallow, very elongate impressions behind scutellum. Head with fine coriaceous/colliculate microsculpture, fading on elevated parts, stronger in impressions, on pronotum microsculpture slightly stronger and more even. Punctation on head sparse, mostly confined to posterior part and sides, on pronotum more evenly spaced, average interspaces much larger than puncture diameters; elytral punctation more even and regularly spaced, average interspaces (with indistinct coriaceous microsculpture) about as puncture diameters, punctures discrete.

Abdomen. Compared to forebody, abdomen with much more sparse, finer, less distinct punctation, microsculpture on tergal apices fine coriaceous with moderately transverse cells. Tergite VII posterior margin with palisade fringe unmodified in middle (nearly uniform breadth). Tergite VIII (Fig. 203) basal edge evenly arched, but straight at a short distance in middle of basal sclerotized band; apical edge with sinuate (protruding) corners, and broad, moderately deep emargination in between. Sternite VIII with rounded apical corners, apex in males shallowly concave laterally, gently sinuate in middle; in females slightly more sinuate (convex) in middle. Tergite X unmodified, apex very slightly wider in males than in females. Aedeagus as in Fig. 189, inner sclerites as in Figs 190-191. Female ringstructures as in Figs 192-193.

COMPARATIVE NOTES: This species by its surface sculpture is similar to O. tatricus , but in the latter the elytra are much more elongate and less broad. Another similar species is O. legrosi , in fact the two are barely distinguishable externally ( O. legrosi slightly larger), but their distributions (according to our current knowledge) do not overlap, as O. legrosi only occurs in the highest ranges of the Pyrenées.

DISTRIBUTION: The species is so far known from the Carpathians and the Southern Alps. An exemplar from Derek A. Lott's collection (BMNH) from France, Hautes Alpes, La Grave, Torrent du Gan, 1760 m, 15.VIII.1999 had an aedeagus that undoubtedly belongs to O. brachypterus glued to the card with a dissected specimen of O. praepositus – if we assume that the erroneously glued aedeagus was from the same or a nearby locality as the dissected specimen, this is the westernmost record of the species.

BIONOMICS: Lives in wet moss on rocks at (or in) streams and waterfalls, together with O. praepositus . Reported from caves, but can also be found in more open habitats; however, this species is bound to higher elevations and usually starts appearing in moss taken at around 1500 m, where it is still comparatively rarer than O. praepositus , but at higher elevations (in the Pinus mugo belt) the balance gradually shifts towards O. brachypterus , and near 2000 m the latter can even be dominant in samples. Very occasionally specimens were found at lower elevations (1000-1200 m), in deep valleys, at cold, fast streams.

Ochthephilus columbiensis (Hatch, 1957) Figs 228, 234-238, 531, 566 Ancyrophorus columbiensis Hatch, 1957: 91 .

Ochthephilus columbiensis (Hatch) . – Herman, 1970: 384.

TYPE MATERIAL EXAMINED: Ancyrophorus columbiensis – HOLOTYPE: “ Canada, British

Columbia , Copper Mtn. [*+49.33/-120.54*], 11.X.1930, leg. G. Stace Smith ” (coll. G. Stace Smith, SMDV). – PARATYPES (3) : same data as holotype (coll. G. Stace Smith, SMDV, 1). “ Canada, British Columbia, Bakerville, 4200ft. [*+53.07/-121.52*], 12.VIII.1950, leg. G. Stace Smith, ex fungus” (coll. G. Stace Smith, SMDV, 1), “USA, Idaho, Twin Creek For. Ca, Challis Nat. For. 5000ft [*+45.61/-113.97*], 25.VII.1952., leg. B. Malkin ” ( FMNH, 1) .

OTHER MATERIAL: see Appendix.

REDESCRIPTION: Forebody as in Fig. 531. Measurements (n=10): HW = 0.55 (0.53-0.59); TW = 0.52 (0.51-0.56); PW = 0.66 (0.62-0.69); SW = 0.76 (0.72-0.80); AW = 0.89 (0.82-0.97); HL = 0.42 (0.41-0.46); EL = 0.16 (0.14-0.17); TL = 0.10 (0.09- 0.11); PL = 0.52 (0.50-0.54); SL = 0.84 (0.78-0.89); SC = 0.76 (0.70-0.80); FB = 1.85 (1.74-1.92); BL = 3.43 (3.04-3.96) mm. Head, pronotum and abdomen dark brown, with very slight reddish tone. Elytra reddish medium to dark brown, darker around scutellum and shoulders, sometimes also at apex. Pronotum in some specimens appear lighter, slightly reddish. Mouthparts and antennae reddish dark brown, legs reddish medium brown, tibiae (especially both ends) and tarsi lighter. Body with greasy lustre mostly due to elytral setation plus forebody punctation and microsculpture. Pubescence rather fine and moderately dense, shorter and stronger (regularly spaced) on elytra, abdominal tergites with finer and longer setae, especially adjacent to laterosternites. Head anteriad eyes and near inner posterior margin of eye with stronger and darker bristles, as well as pronotal margin and middle of tibiae. Elytral apex without conspicuous setae. Last tarsomere with a few setae only.

Forebody. Antenna as in Fig. 566. Clypeus almost impunctate (colliculate microsculptured), trapezoid, corners rounded, anterior edge gently arched; separated by impressed transversal line (frontoclypeal suture) across a shinier area. Supraantennal prominences well developed, feebly separated from clypeus/vertex by impressions. Vertex with oblique impressions in middle almost joining in V-shape. Temples slightly bulging, evenly curved, significantly longer than half of eye length. Neck separated by a shallowly impressed transversal groove, microsculpture much stronger than on head, with transverse cells, no setation. Pronotum with a narrow marginal bead, visible to anterior pronotal corners. Posterior pronotal angles well-formed, just slightly obtuse-angled, sides in posterior 1/2 very gently concave/bisinuate. 'Anchor' fully formed, longitudinal midline as a slightly elevated, impunctate, weakly microsculptured line, parallel to this line two gentle, semi-longitudinal elongate elevations in anterior half of disc. In corners of anchor feeble, oblique impressions directed outwards, in middle at sides of midline two smaller impressions. Elytra slightly broadening posteriorly, sutural corners narrowly rounded; apical sides slightly oblique and in inner halves more or less straight. Elytral surface rather even with two shallow, very elongate impressions behind scutellum. Head with fine coriaceous/colliculate microsculpture, fading on elevated parts, stronger in impressions, on pronotum microsculpture slightly stronger and more even. Punctation on head sparse, mostly confined to posterior part and sides, on pronotum more evenly spaced, average interspaces much larger than puncture diameters; elytral punctation more even and regularly spaced, average interspaces (with indistinct coriaceous microsculpture) about as puncture diameters, punctures somewhat confluent on whole elytra.

Abdomen. Compared to forebody, abdomen with much more sparse, finer, less distinct punctation, microsculpture on tergal apices fine coriaceous with moderately transverse cells. Tergite VII posterior margin with palisade fringe unmodified in

FIGS 249-255

(249-251) Ochthephiluslegrosi (Jarrige); headandpronotum (249), elytron (250), sideofhead (251). (252-87) O. incognitus sp. n.; headandpronotum (252), elytron (253). (254-255) O. angustior (Bernhauer) ; sideofhead (254), antennomeres 5-7 (255). AllSEM, dorsalviews. Scale bar = 0.17 mm for 254-255, 0.25 mm for 251, 0.30 mm for 252-253, 0.50 mm for 249-250.

middle (nearly uniform breadth). Tergite VIII (Fig. 228) basal edge evenly arched, with small concavity in middle of basal sclerotized band; apical edge with sinuate (protruding) corners, and broad, moderately deep emargination in between. Sternite VIII with rounded apical corners, apex in males shallowly concave laterally, gently sinuate in middle; in females slightly more sinuate (convex) in middle. Tergite X unmodified, apex very slightly wider in males than in females. Aedeagus as in Fig. 234, inner sclerites as in Figs 235-236. Female ringstructures as in Figs 237-238.

COMPARATIVE NOTES: The characteristic specimens of O. columbiensis are easily separable from the congeners occuring in the same area ( O. planus , the smaller O. forticornis and the larger O. hammondi ) by the shorter (and often flat, medially depressed) elytra. The uncharacteristic specimens could be somewhat difficult to separate from O. planus , but the latter has shorter, less developed temples, microsculpture fading around frontoclypeal suture. Ochthephilus hammondi (the two distibution ranges barely overlap) is separable by its medially modified palisade fringe on apex of tergite VII.

DISTRIBUTION: Found in the Pacific Coast Ranges and the Rocky Mountains except the southernmost states (California, Arizona, New Mexico).

BIONOMICS: Specimens were found most frequently at stream banks, in muddy gravel, in wet moss at stream edge and along waterfalls, in river debris and under rocks along water. Collected also from willow litter near stream and springs and occasionally also from dung.