Gyretes californicus, Regimbart 1907

Babin, Jennifer & Alarie, Yves, 2004, Taxonomic Revision of Genus Gyretes Brullé (Coleoptera: Gyrinidae) from America North of Mexico, The Coleopterists Bulletin 58 (4), pp. 538-567 : 538-567

G. californicus Régimbart 1907

Notes About Type Material of G. sinuatus . LeConte did not explicitly designate holotypes in his descriptions. The syntype studied is a female specimen ( MCZC) glued to a point with the following labels: gold circular tag/ Type 6109 [red label]/ Gyretes sinuatus Lec. [handwritten]/ Vidit J.J. Babin 2002 [white rectangular label]. LeConte indicated that the type locality was Colorado River. The ventral surface is covered in glue and dirt, penultimate tergite is hidden, last abdominal segment is partially exposed, body is more reddish than black .

Notes About Type Material of G. compressus . LeConte did not explicitly designate holotypes in his descriptions. The syntype studied is a female specimen ( MCZC) pinned through the body with the following labels: gold circular tag/Type 6110 [red label]/ G. compressus Lec. [handwritten]/ Vidit J.J. Babin 2002 [white rectangular label]. LeConte indicated that the type locality was Quincy, Illinois. Dorsal surface with dirt and patches of glue and film. Ventral surface with some dirt particles. Penultimate tergite is hidden, last abdominal segment is partially exposed, body is red-black .

Diagnosis. This species is variable in size but is generally larger than G. iricolor and smaller than G. torosus new species. Body is not as attenuated as G. iricolor in dorsal view but it is not as rounded as G. torosus new species. Pronotum with rounded mesh microreticulation seen at a magnification of 403 with faint micropunctures. Midcaudal tooth on the penultimate tergite present. Body outline is variable but is generally ovate. Female elytral apex at most slightly produced ( Figs. 21, 23 ). Epipleuron orange to dark brown, generally darker than G. iricolor .

Redescription. Microsculpture and punctation. Pronotal microreticulation rhomboid and distinct at a magnification of 403. A small field of distinct rhomboid microreticulation present on the female elytral apex. Micropunctation may occur on pronotum and elytra. Measurements ( Table 5). Pronotum 1.3–1.8 times broader than head. Elytra 1.0–1.2 times broader than pronotum. Standardized body length 1.9–2.3 times greater than elytral width. Elytral pubescence variable (0.1–0.6 mm), generally thicker than G. iricolor . Female pubescent band is reduced to 1–2 hairs at elytral apex. Male protibia more strongly widened distally than G. iricolor , being 2.2–2.8 times longer than wide.

Remarks. Body outline rounded to slightly angular in southeastern beetles. Midcaudal tooth of penultimate tergite often more pronounced in females than males. This tooth is generally very distinct but may be reduced to a small projection in Texas and California specimens. A general increase in body size and width of elytral

556 pubescence occurs in an east-to-west pattern. Pronotal microreticulation is faint and sparse (occurring more laterally) in Oklahoma specimens. Female elytral apex does not extend strongly along midline but may be slightly produced, giving a slight projecting in lateral perspective.

Distribution. California to Alabama, north to Indiana and Illinois, Virginia.

Material Examined. Two syntypes and 393 specimens with the following label data:

ALABAMA: Borden Cr., Lawrence Co., Bankhead Natl. For. , at F.S. Rd. 224, 16.V.1988, coll. C.B. Barr (2, CISC; 4, LSAM) ; Lawrence Co., 8 mi. S. Mount Hope , 22.V.1988, coll. Paul and Phyllis Spangler (1, USNM) ; Lawrence Co., 5.5 mi. S. Youngtown, 23.V.1988, coll. Paul and Phyllis Spangler (2, USNM) ; Lawrence Co., 5 mi. S. Youngtown, 26.V.1988, coll. Paul and Phyllis Spangler (3, USNM) ; Brushy Cr., Peterman , Monroe Co., 15.VI.1991, coll. I.S. Askevold (5, JBWM) ; Peterman , Monroe Co., 11.IV.1980, coll. W.E. Steiner (1, USNM) ; Brushy Cr., Monroe Co., 0.2 km E. Peterman, at Rd. 30, undercut stream bank, 29.IV.1987, coll. R.G. Beutel, R.E. Roughley (8, JBWM) ; Line Cr., Montgomery-Mason Co. line, at I-85, 9.VI.1972, coll. G.W. Folkerts (1, TAMU) ; Watermelon Cr. , Russel Co., 5 km S. Seale, 8.IV.1980, coll. W.E. Steiner (1, USNM) ; Indian Cr., Walker Co., 7.5 mi. S. Oakman, at Ala 69, 7.IX.1973, coll. G.W. Folkerts (2, TAMU) . ARIZONA: (1, ICCM; 1, INHS) ; Yuma (1, ANSP) ; Gila Valley , 3 mi. SE Bylas, 2,000 ft, at light, 18.VII.1952, coll. R.B. and R.K Selander (1, USNM) . ARKANSAS: Saline R., Howard Co., at Hwy. 4, N. Dierks, 12.IV.1987, coll. C.B. Barr (2, CISC; 3, LSAM) . CALIFORNIA: (2, ICCM; 1, MCZC) . INDIANA: Green Co. Stream, Greene Co. , 2 mi. S. Bloomfield, 7.IX.1963, coll. F.N. Young (1, FSCA) ; Fish Cr., Owen Co., Nr. Freedom , 9.VIII.1971, coll. F.N. Young (6, FSCA) .

KANSAS: Douglas Co., 17.VI.1922, coll. J. Marion Bruer (1, MCZC) . LOUISIANA: (3, CASC) ; Vowell’s Mill (4, AMNH; 11, CASC; 1, FSCA; 1, UCMC) ; Vowell’s Mill , coll. A. Lustgurs (1, AMNH) ; Beaugard Co. (Presumed to be Beauregard ), 13.VIII.28, coll. R.H. Beamer Jr. (10, UKAN) ; Little Comite Cr., East Feliciana Par., Hwy 19, 16.IV.1983, coll. T.W. Walker (1, LSAM) ; Hog Branch Cr., Livingston Par., 1980 (1, LSAM) ; Kisatchie Bayou, Natchitoches Par., Kisatchie Natl. For. , S. Kisatchie Bayou Cgd., 18.VI.1988, coll. C.B. Barr (1, CISC; 1, LSAM) ; Abita Cr., St. Tammany Par. , at Abita Springs, LA 435, 29.IV.1981, coll. C.B. Barr (2, CISC; 1, LSAM) ; Abita Cr., St. Tammany Par. , at Abita Springs, LA 435, collected in roots, 29.IV.1981, coll. C.B. Barr (5, LSAM) ; Natalbany R., Tangipahoa Par., W. Independence , LA 40, 13.VIII.1980, coll. C.B. Barr (2, CISC) ; Natalbany R., Tangipahoa Par., W. Independence ; LA 40, collected on wood, 13.VIII.1980, coll. C.B. Barr (2, LSAM) ; Comrade Cr., Vernon Par. , 0.5 mi. W. Kerthwood, 7.X.1967, coll. J.G. Wells (2, FSCA) . MISSISSIPPI: Richton , 3.III.1932, coll. H. Dietrich (1, CUIC) ; Homochita R., Lincoln Co., at 550, 25.IV.1976, coll. G.W. Wolfe (2, FSCA) ; Marion Co., 6 mi. E. Columbia, 21.IV.1979, coll. Paul K. Lago (1, FSCA) ; Pearl River Co., 1 mi. SW Silver Run , 26.V.1980, coll. Paul K. Lago (1, FSCA) ; Wilkinson Co., 4 mi. W. Wilkinson, 27.V.1980, coll. Paul K. Lago (1, FSCA) .

MISSOURI: Little Black R., Poplar Bluff, 12 mi. S. Rt. 160, 23.IV.1956, coll. P.J. Spangler (1, USNM) . NEW MEXICO: (2, CASC) ; Carlsbad (1, USNM) ; Carlsbad , 27.VIII.1934, coll. Carl J. Drake (1, FSCA) ; Las Cruces , Dona Ana Co., 1.IX.1953, coll. R.X. Schick (2, LACM) . OKLAHOMA: Latimer Co., VIII.1982, coll. K. Stephan (32, FSCA) ; Latimer Co., VIII.1986, coll. K. Stephen (5, FSCA) . TENNESSEE: Elmwood , coll. J . Corse (1, CASC) . TEXAS: (2, AMNH; 3, ANSP; 6, ICCM; 7, INHS; 1, MCZC; 20, USNM); coll. W.E. Dietz (2, MCZC) ; coll. Fuchs and Leach (1, CASC) ; Green River Survey, 12.5.1981 (1, ANSP) ; Columbus (3, MCZC; 19 USNM); Columbus , coll. E.A. Schwarz (1, CASC; 9 USNM); Dallas (2, ANSP; 2, MCZC; 3, MSUC; 4, UKAN; 2, USNM); Dallas, coll. F.C. Bowditch (2, FSCA) ; Dallas , coll. Liebeck (1, FSCA) ; Ft. Ringgold , 20.V.1995 (1, CASC; 6 USNM) ; Guadalupe R. nr. Victoria , 23.VIII.62, coll. S.S. Roback (1, ANSP) ; Guadalupe R., Sequin , 9.4.1950, coll. T.D. IV (6, ANSP) ; Guadalupe R., nr Bloomington , 3 mi. below DuPont Plant, 20.VIII.1952, coll. T.D. IV (1, ANSP) ; Guadalupe R., S. Victoria, below DuPont Plant , 21.VIII.1952, coll. T.D. IV (4, ANSP) ; Laredo , 12.XII.1930, coll. Eugene Ray (28, FMNH) ; Presidio , 17.VI.1968, coll. J.E. Hafernik (2, TAMU) ; Presidio , 18.VI.1968, coll. J.E. Hafernik (3, TAMU) ; Presidio , at black light, 18.VI.1968, coll. J.E. Hafernik (2, TAMU) ; Santa Elena Canyon, Big Bend Nat. Park , 24.IV.1953, coll. B.J. Adelson (43, CASC) ; Rio Grande Camp, Big Bend Nat. Park , at UV light trap, 25.VIII.1971, coll. D.P. Levin (2, LACM) ; Little Brazos R., Brazos Co., at TX 21, 20.X.1995, coll. S.K. Jasper (1, TAMU) ; Brewster Co., Boquillas Camp , Big Bend N.M., 6.VIII.1963, coll. J. Doyen (1, CISC) ; Cameron Co., 8.3.28, coll. J.G. Shaw (1, UKAN) ; Dimmit Co., coll. A.W. (1, CASC) ; Hidalgo Co. , 30.VII.1928, coll. R.H. Beamer (3, UKAN) ; Cascade Caverns, Boerne , Kendall Co., 21.VIII.1981, coll. W.E. Steiner (1, USNM) ; Kerrville , Kerr Co., 17.IX.1977, coll. Hanson and Hsiao (1, EMUS) ; Lee Co., 4.IV.1907 (1, MSUC) ; Long King Cr. , Polk Co., 0.5 mi. W. Livingston, 14.VII.1962, coll. H.R. Burke (4, TAMU) ; Shafter , Presidio Co., 22.VI.1968, coll. J.E. Hafernik (1, TAMU) ; Starr Co., 30.VII.28, coll. R.H. Beamer (6, UKAN) ; Guadalupe R., Victoria , Victoria Co., 0.5 mi. below DuPont pump house, 12.VIII.73, coll. J. Richardson (2, ANSP) ; San Gabriel R., Williamson Co., at Hwy 95, 16.VII.1972, coll. Phelps and Sweet (27, TAMU) . VIRGINIA: (1, MCZC) . NO LOCALITY: (2, CUIC; 1, MCZC).

Figures

Figs. 20–23. Selected structures of female Gyretes. 20–21) Lateral habitus. 20) Gyretes iricolor; 21) G. sinuatus. 22–23) Apex of elytra, dorsal aspect. 22) Gyretes iricolor; 23) G. sinuatus.