Pinodytes parvus 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 : 32-33

Pinodytes parvus Peck & Cook , new species

( Figs. 21 , 184 , 201–208 )

Type material. Holotype: male ( CSCA). UNITED STATES. California: Del Norte Co., 5 mi S Gasquet, V-7- 1971, Fred G. Andrews. Paratypes (90). UNITED STATES. California: with same data as holotype, 58 ( CSCA); Contra Costa Co., 3miSE Lafayette, 10.III.2000, D.S. Chandler, sift live oak litter, 2 ( UNHC); Contra Costa Co., Mt. Diablo, 15.II.1953, G.A. Marsh, 5 ( EMEC); Contra Costa Co., Mt. Diablo, 24.II.1953, G.A. Marsh, 1 ( EMEC); Del Norte Co., Jeddiah Smith St. Pk., 25.XI.1981, F.W. Merickel, Ber. sequoia leaf litter, 9 ( WFBM); Humboldt Co., Blue Lake, 31.III.1975, T.R. Haig, Ber. redwood duff, 1 ( CSCA); Mendocino Co., 16miW Willets, 27.III.1964, C.W. O’Brien, redwood duff, 1 ( CNCI); Mendocino Co., Hwy. 20, 11.3miE Jct. Hwy. 1, 10.IV.1971, Fred G. Andrews, Ber. unident. litter, 2 ( CSCA); Mendocino Co., Leggett, Drive-Thru Tree Park, 27.III. 1995, 300m, A. Newton, M. Thayer, 956, Sequoia – Pseudotsuga menziesii for. w/some hdwds., Ber. leaf & log litter, 10 ( FMNH); Mendocino Co., Little River, 10.VIII.1957, J.R. Helfer, 1 ( UCDC).

Material examined. We have examined 91 specimens.

Distribution. Specimens ( Fig. 184 ) are known from Del Norte, Humboldt, and Mendocino counties in the Coastal Ranges of northern California, and from Contra Costa County on the south side of San Francisco Bay.

Diagnostic description. Total length 1.20–1.36 mm; greatest width 0.66–0.74 mm. Reddish brown to dark brown; oval in shape ( Fig. 21 ). Head. Finely, sparsely punctate; a larger puncture on each side opposite posterior one-half of stem of epistomal suture; shining, with transverse substriate microsculpture. Eyes absent. Antenna ( Fig. 201 ) with antennomeres 2 and 3 subequal in length; antennomere 5 larger than 4 and 6; antennomere 7 longer but not wider than 8; antennomeres 9 and 10 each with a single sensory vesicle indicated apically by a protruding flange. Pronotum. Finely punctate, punctures separated by 2–4 diameters; shining, with transverse substriate microsculpture. Widest at base, weakly narrowing in apical one-half; apical margin weakly emarginate, basal margin nearly straight; apical angles rounded, basal angles about rectangular. Elytra. Moderately finely punctate; punctures not arranged in longitudinal rows except basally near suture; punctures joined by fine transverse strioles. Joined elytra slightly wider than pronotum; widest in basal one-third, roundly narrowing to apex. Legs. Protibia ( Fig. 202 ) slender; width increases evenly from base to apex; spinose near apex and apically; densely, finely spinose on apical one-half of inner margin. Mesotibia ( Fig.203 ) moderately slender; strongly spinose on outer margin and apically; spine at apical one-fourth of inner margin. Metatibia ( Fig. 204 ) slender, straight; outer margin with strong spines near apex and one-third from apex; apex spinose; small spines on apical one-half of inner margin. Metafemur ( Fig. 204 ) slender. Male protarsomeres ( Fig. 202 ) weakly expanded, bearing elongate setae laterally and broad, thin, colorless phanerae ventrally. Mesotarsomeres without phanerae. Venter. Mesoventrite ( Fig. 208 ) carinate; longitudinal carina with large toothlike expansion near middle; depressed but not excavated behind transverse carina. Male genitalia. Median lobe of aedeagus ( Figs. 205, 206 ) elongate; apex flat, moderately narrow with rounded apex. Inverted internal sac ( Fig. 206 ) with two pairs of elongate sclerotized structures. Parameres ( Figs. 205, 206 ) elongate, moderately narrow, extending beyond apex of median lobe; apices flat, each bearing two setae before apex. Spermatheca. Elongate ( Fig. 207 ), bulbous at apex.

Etymology. The name parvus, Latin , little, refers to the small size of this species.

Figures

FIGURE 184. Distributions of species in the Pinodytes pusio species group in the southwestern United States. P.marinensis, open squares in the Coastal Ranges northwest of San Francisco Bay. P. minutus, open circles in the Coast and Sierra Nevada Mountains of central California, on both sides of the Napa River Valley. P. monterey, closed circles in the coastal Santa Lucia Mountains. P. parvus, closed triangles of the Coastal Ranges of northwest California., with disjunct populations west of San Francisco Bay. P. sanjacinto, open triangles in the San Jacinto Mountains of southern California.

FIGURES 19–27. Pinodytes habitus photos. 19. P.minutus, total length 1.08 mm. 20. P. monterey, total length 1.52 mm. 21. P. parvus, total length 1.22 mm. 22. P. sanjacinto, total length 1.60 mm. 23. P. sequoia, total length 2.92 mm. 24. P.shasta, total

FIGURES 201–208. Pinodytes parvus. 201. Male right antenna, dorsal. 202. Male right protibia and protarsus. 203. Male right mesotibia. 204. Male right metafemur and metatibia. 205. Aedeagus, lateral. 206. Aedeagus, dorsal. 207. Spermatheca. 208. Mesoventrite, lateral. Scale bar = 0.15 mm (Fig. 207), 0.3 mm (Figs. 201–206, 208).