Pinodytes newtoni Peck & Cook, 2011

Peck, Stewart B. & Cook, Joyce, 2011, Systematics, distributions and bionomics of the Catopocerini (eyeless soil fungivore beetles) of North America (Coleoptera: Leiodidae: Catopocerinae) 3077, Zootaxa 3077 (1), pp. 1-118 : 17-18

Pinodytes newtoni Peck & Cook , new species

( Figs. 2 , 44–52 )

Type material. Holotype: male ( UADE). UNITED STATES. Arkansas: Polk Co., 3.5 mi W. Queen Wilhelmina St. Pk., 12.X.1974, 2500’, A. Newton, Ber. ground litter, mixed hardwood for. Paratypes (94). UNITED STATES. Arkansas: same data as holotype, 6 ( UADE); Benton Co.: 2miSE Gateway, 23.III.1984, L.E. Watrous, litter along stream, 1 ( FMNH); Franklin Co., Ozark-St. Francis NF, White Rock WMA, 9.4kmN Cass, 17.IV.2008, J. Dorshorst & J. Gruber, sift flood debris W. Fleming Ck., 1 ( IRCW); Garland Co., Camp Clearfork, RL891, 20.II.1988, R. Leschen, Xylaria polymorphs at base of old Quercus , 3 ( UADE); Hot Spring Co., Bismark, 2miWNW, 13.IV.1984, D. Beyers & M. Jenks, log and lotter, 5 ( FMNH); Marion Co., Buffalo Pt. nr. Mull, 24–25.X.1974, 500’, A. Newton, Ber. ground litter, mixed hw for., 9 ( UADE); Newton Co., Lost Valley nr. Ponca, 23–24.X.1974, 1000’, A. Newton, Ber. ground litter, mixed hw for., 1 ( UADE); Polk Co., 0.6miWSW Rich Mountain (town), 26.VI. 1986, 570m, A. Newton & M. Thayer, 756, hickory, oak, mixed hw forest litter Ber., 4 ( FMNH); Polk Co., 3.5miW Queen Wilhelmina St. Pk., 11–12.X.1974, 2500’, A. Newton, Ber ground litter, mixed hw for., 13 ( UADE); Polk Co., Ouachite N.F., E. end Caney Ck. Trail, 27.VI. 1986, 440m, A. Newton & M. Thayer, 757, Oakhickory for. litter Ber., 3 ( FMNH); Polk Co., Queen Wilhelmina St. Pk., 11–12.X.1974, A. Newton, Ber. ground litter mixed hw for., 2 ( FMNH); Pope Co., 2miN Dover, 27.III.2984, L.E. Watrous, pine oak litter, 1 ( FMNH); Stone Co., Blanchard Springs nr. Fifty Six, 25–26.X.1974, 300’, A. Newton, Ber. ground litter, mixed hw for., 4 ( UADE); Missouri: Crawford Co., 6miSE Leasburg, 38.0304N, 91.2150W, 28.V.2007, L.E. Watrous, 866, woodland soil, 1 ( LEWC); Crawford Co., 6miSE Leasburg, 38.0307N, 91.2110W, 30.VI.2007, L.E. Watrous, 904, bottomland soil, 1 ( LEWC); McDonald Co., 1miN Noel, 35.5994N, 94.4962W, 13.VI.2007, L.E. Watrous, 866, glade soil, 1 ( LEWC); St. Louis Co., 2.6miNE Pacific, 38.5039N, 90.7020W, 19.VI.2007, L.E. Watrous, 894, bottomland soil, 6 ( LEWC); St. Louis Co., 3miE Pacific, 38.4984N, 90.6861W, 3.VI.2007, L.E. Watrous, 874, grass soil, 1 ( LEWC); St. Louis Co., 3miNE Pacific, 38.4985N, 90.6890W, 27.V.2007, L.E. Watrous, 872, grass soil, 1 ( LEWC); St. Louis, 4miN Eureka, 38.5656N, 90.6453W, 16.II.2006, L.E. Watrous, 477, glade litter, 2 ( LEWC); St. Louis Co., 4miN Eureka, 38.5656N, 90.6469W, 27.V.2007, L.E. Watrous, 865, woodland soil, 15 ( LEWC); Texas: Sabine Co., 9miE Hemphill “Beech Bottom”, 8.III.1989, R. Anderson & E. Morris, Ber. beech-magnolia leaf litter, 5 ( SBPC); Sabine Co., 9miE Hemphill “Beech Bottom”, 16.III.1997, E.G. Riley, 424, Ber. litter beech-magnolia forest, 2 ( TAMU); Sabine Co., 9miE Hemphill “Beech Bottom”, 24.IV.89, R. Anderson et al., Ber. beech-magnolia leaf litter, 6 ( SBPC).

Material examined. We have examined 95 specimens.

Distribution. Specimens ( Fig. 52 ) are known from Benton, Franklin, Garland, Hot Spring, Marion, Newton, Polk, Pope, and Stone counties, Arkansas; Crawforn, McDonald, and St. Louis counties, Missouri; and Sabine County, Texas.

Diagnostic description. Total length 1.66–1.98 mm; greatest width 0.74–0.94 mm. Light to dark reddish brown, head often darker; elongate-oval in shape ( Fig. 2 ). Head. Finely, sparsely punctate; with faint substriate microsculpture. Eyes absent. Antennomere 2 longer than 3 ( Fig. 44 ); antennomeres 5 and 6 subequal, larger than 4; antennomere 7 larger than 8; antennomeres 9 and 10 lack visible sensory vesicles. Pronotum. Finely, sparsely punctate; with faint substriate microsculpture. Widest at basal one-fourth, narrower at apex than at base, sides rounded; apical margin slightly emarginate, basal margin straight; apical angles rounded, basal angles slightly obtuse. Elytra. Punctures larger and more dense than on pronotum; weak strigae between punctures; striae vaguely indicated basally, absent apically. Joined elytra widest in basal one-half; sides parallel basally, narrowing in apical one-half. Legs. Protibia ( Fig. 45 ) evenly widening to apex; dense, fine spines on apical one-half of inner margin; outer margin with three short spines and two longer spines near apex. Mesotibia ( Fig. 46 ) evenly widening to apex; apical one-half on inner margin finely spinose; outer margin spinose. Metatibia ( Fig. 47 ) elongate, slender, weakly curved in male, spinose. Metafemur ( Fig. 47 ) slender. Male protarsomeres ( Fig. 45 ) and mesotarsomeres ( Fig. 46 ) weakly expanded and bearing elongate setae laterally and white, spatulate phanerae ventrally. Venter. Mesoventrite ( Fig. 51 ) carinate, longitudinal carina with one or two small lobes anteriorly, not excavated behind transverse carina. Male genitalia. Median lobe of aedeagus ( Figs. 48, 49 ) broad, flat apically; apex variable in width. Everted internal sac covered with short, broad spines; elongate spines at apex. Parameres ( Figs. 48, 49 ) broad, not reaching apex of median lobe; each with two apical setae. Spermatheca. Elongate ( Fig. 59 ), tubular, variably curved.

Notes. Three specimens, with guts packed with host tissue, were taken on sporocarps of Xylaria polymorpha (Xylariaceae) by Richard Leschen (in litt 24 Feb 1988).

Etymology. This species is named in recognition of its discovery by Dr. A.F. Newton of the Field Museum, Chicago, Illinois.

Figures

FIGURE 52. Distributions of basal and monobasic species groups of Pinodytes in western United States. P. newtoni, closed circles in Missouri, Arkansas, and Texas. P. borealis, closed circles in inset map of Alaska. P. punctatus, open squares in eastern Washington and northern Idaho. P.colorado, open circles in western Colorado. Note: in this and all following maps, small open circles represent major cities.

FIGURES 2–10. Pinodytes habitus photos. 2. P.newtoni, total length 1.38 mm. 3. P. borealis, total length 2.10 mm. 4. P. punctatus, total length 1.36 mm. 5. P.colorado, total length 1.66 mm. 6. P.pusio, total length 1.54 mm. 7. P. ovatus, total length 1.34 mm. 8. P. chandleri, total length 1.54 mm. 9. P. constrictus, total length 1.48 mm. 10. P.contortus, total length 1.16 mm.

FIGURES 44–51. Pinodytes newtoni. 44. Male right antenna, dorsal. 45. Male right protibia and protarsus. 46. Male right mesotibia and mesotarsus. 47. Male right metafemur and metatibia. 48. Aedeagus, lateral. 49. Aedeagus, dorsal. 50. Spermatheca. 51. Mesoventrite, lateral. Scale bar = 0.15 mm (Fig. 50), 0.2 mm (Fig. 49), 0.3 mm (Figs. 45–48, 51), 0.4 mm (Fig. 44).

FIGURES 53–61. Pinodytes borealis. 53. Male right antenna, dorsal. 54. Male right protibia and protarsus. 55. Male right mesotibia and mesotarsus. 56. Male right metafemur and metatibia. 57. Aedeagus, lateral. 58. Everted internal sac, lateral. 59. Aedeagus, dorsal. 60. Spermatheca. 61. Mesoventrite, lateral. Scale bar = 0.1 mm (Fig. 60), 0.25 mm (Fig. 61), 0.3 mm (Figs. 57–59), 0.4 mm (Figs. 53–55), 0.5 mm (Fig. 56).