Syzeton floridanus ( Werner, 1990 ) Gompel, 2022

Gompel, Nicolas, 2022, The genus Syzeton Blackburn, 1891 (Coleoptera, Aderidae) in the United States of America, Zootaxa 5162 (3), pp. 243-267 : 263-264

Syzeton floridanus ( Werner, 1990) , comb. nov.

( Figures 1c ; 2k ; 3k ; 4c ; 5k )

Zonantes floridanus Werner, 1990: 222 ;

Holotype: Florida, Dade County, Camp Mahachee , nr. Matheson Hammock ( FSCA) ( Werner, 1990)

Material examined. United States. Alabama: Blount County, Highland Lake , (280 m) [33°53’ N 86°25’ W], light trap, 21.VII.2013, T. King leg. (1 ♂, FSCA) ; Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 17.III.2016, R. Turnbow leg. (1 ♂, FSCA) ; Dale County, Level Plains [31°17’ N 85°46’ W], flight intercept trap, 22.IV.2016, R. Turnbow leg. (1 ♂, FSCA) . Florida: Alachua County , (200 m) [29°36’ N 82°22’ W], 28.VIII.1992, J. Pickering leg. (1 ♀, FSCA) ; Alachua County, West of Gainesville, Pierce’s homestead [29°39’ N 82°19’ W], Malaise, 4.I.1974, W. H. Pierce leg. (1 ♀, FSCA) ; Alachua County, SE of Gainesville, Kincaid Road , 1 mi. N Paynes [29°38’ N 82°17’ W], old field/dry oak hammock, Malaise, 10.VII.1999, B. D. Sutton leg. (1 ♂, FSCA) ; Alachua County, Gainesville, San Felasco Hammock Preserve State [29°42’ N 82°27’ W], 15.IX.1988, M. C. Thomas leg. (1 ♂, FSCA) ; Alachua County, Gainesville, S side Bivens Arm Lake , (30 m) [29°37’ N 82°20’ W], 26.II.2000, P. E. Skelley leg. (1 ♂, FSCA) ; Alachua County, Gainesville, S side Bivens Arm Lake , (30 m) [29°37’ N 82°20’ W], 20.III.2008, P. E. Skelley leg. (1 ♀, FSCA) ; Collier County, Immokalee, Southwest Florida Research and Education , (10 m.) [26°27’ N 82°26’ W], suction trap, 20.IX.2007, S. Halbert leg. (1 ♂, FSCA) ; Dade County, Camp Mahachee, Near Matheson Hammock , (5 m) [25°40’ N 80°16’ W], black light trap, 5.V.1983, M. C. Thomas & L. Parker leg. (1 ♀, FSCA) ; Dade County, Camp Mahachee, Near Matheson Hammock , (5 m) [25°40’ N 80°16’ W], black light trap, 23.VIII.1983, M. C. Thomas & L. Parker leg. (1 ♀, FSCA) ; Escambia County, Cantonment, 2666 Monica Lane , (40 m) [30°33’ N 87°18’ W], black light trap, 10.IV.2009, T. Dobbs leg. (1 ♂, FSCA) ; Franklin County, 2 mi. NW Ochlockonee Bay , (2 m) [30°00’ N 84°25’ W], 2.XII.2004, C. W. O’Brien & M. Haseeb leg. (1 ♀, FSCA) ; Hernando County, Withlacoochee State Forest, Richloam Unit , (35 m), 27.IV.1991, R. Turnbow leg. (4 ♀♀ and 1 ♂, FSCA) ; Hernando County, Withlacoochee State Forest, Richloam Unit , (35 m), beating vegetation, 15.IV.2005, R. Turnbow leg. (1 ♂, FSCA) ; Liberty County, Torreya State Park , (40 m) [30°33’ N 84°56’ W], black light trap, 3.V.2003, M. C. Thomas leg. (1 ♀, FSCA) ; Liberty County, Torreya State Park , (40 m) [30°33’ N 84°56’ W], black light trap, 6.V.2007, M. C. Thomas leg. (1 ♀, FSCA) ; Marion County, 2.5 mi. SSE Micanopy , (40 m) [29°29’ N 82°14’ W], Malaise trap, 2.IV.1989, D. Wahl D. B. leg. (1 ♀, ERPC) ; Monroe County, Upper Key Largo , (40 m) [25°05’ N 80°26’ W], 30.V.1997, M. C. Thomas leg. (1 ♂, FSCA) ; Monroe County, Key Largo, John Pennekamp Coral Reef State Park [25°07’ N 80°24’ W], black light trap, 29.V.1997, P. E. Skelley leg. (6 ♂♂, FSCA) ; Pasco County, Green Swamp West, McNeil Trailhead [28°18’ N 82°03’ W], Grassland /savanna with oaks and palms, Beaten from branches of Quercus sp. , 12.I.2014, J. P. Gruber leg. (4♀♀ and 3 ♂♂, NGPC) ; Hardwood /coniferous forest, Beaten from branches of hardwood tree, 15.I.2014, J. P. Gruber leg. (4♀♀ and 5 ♂♂, WIRC; 7 sp. and 1 ♂, NGPC) ; 17.I.2014, J. P. Gruber leg. (2 ♀♀ and 4 ♂♂, WIRC) ; County, Green Swamp West, Cumpressco Entrance , (30 m), Mixed hardwood/coniferous forest, Beaten from branches of Quercus sp. tree, 13.I.2014, J. P. Gruber leg. (2 ♀♀ and 1 6, WIRC) ; Pasco County, Green Swamp West, Main Entrance , (30 m) [28°22’02” N 82°07’04” W], Mixed hardwood/coniferous forest, Beaten from fan-like leaf of palm, 12.I.2014, J. P. Gruber leg. (16 ♀♀ and 16 ♂♂, WIRC) ; Polk County, Winter Haven [28°01’ N 81°43’ W], suction trap, 25.II.2005 (1 ♂, FSCA) . Georgia: Thomas County, Wade Forest Tract, 10 km S Thomasville, (75 m) [30°45’ N 84°00’ W], open pine forest, flight interception trap, 27.IV.2010, S. Peck leg. (1 ♀, FSCA) ; Thomas County, Wade Forest Tract, 10 km S Thomasville, (75 m) [30°45’ N 84°00’ W], open pine forest, Malaise trap, 31.IV.2010, S. Peck leg. (1 ♀, FSCA) . Louisiana: Allen Parish, Whisky Chitto Creek, (25 m) [30°41’ N 92°52’ W], Wet-mesic hardwood forest, Ex. foliage of mixed hardwoods, Along streamlet; bordering Pinus cutover, 7.XI.2014, J. P. Gruber leg. (1 ♀, NGPC) . Texas: Sabine County, Sabine National Forest, 9 mi. E Hemphill, Beech Bottom [31°19’ N 93°42’ W], Flight intercept trap, 2.IV.1989, Anderson leg. (1 ♀, ERPC) . Mississippi: Lee County, Highway 45 at Brewer road, (80 m) [34°08’ N 88°42’ W], 15.V.2008, R. Turnbow leg. (2 ♀, FSCA) .

Distribution. United States: Texas to Florida ( Werner, 1990) .

Figures

FIGURE 1. Morphological characteristics of the genus Syzeton Blackburn, 1991. a, uniseriate elytral pubescence (example, Syzeton nubifer (LeConte, 1878)). b, bean-shaped transversal head in dorsal view (example Syzeton ouachitanus (Werner, 1990)). c, pronotum shape in dorsal view, with anterior margin made of segments converging toward head in an obtuse angle (example Syzeton floridanus (Werner, 1990)). d, pedicel (antennomere 2) shorter than antennomere 3 (examples, left, Syzeton ouachitanus (Werner, 1990) and right, Syzeton nubifer (LeConte, 1878)). e, last abdominal ventrite of ♀ with a medial pit (ex- ample Syzeton fasciatus (Melsheimer 1846)). f, enlargement of framed region in panel e, arrow pointing to pit. g, right midtarsus with arrowheads pointing to ventral brush (example Syzeton pallidus (Werner, 1990)). h, right hind femora in ventral view, white frame centered on excavation (example Syzeton pallidus (Werner, 1990)). i, enlargement of framed region in panel h, arrow pointing to excavation. scale bars: 100 µm.

FIGURE 2. Habitus of US Syzeton species. a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Arkansas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina. m, S. ouachitanus (Werner, 1990), elytral variation. n, S. hubbardi (Casey 1895), elytral variations, the white lines delinate a ~20º angle between the inner oblique markings. o, S. nubifer (LeConte, 1878), elytral variations, the white lines delinate a ~30–40º angle between the inner oblique markings. Scale bars: 1 mm.

FIGURE 3. ♂ genitalia of US Syzeton species in ventral view (left on all panels) and lateral view (right on all panels, ventral facing to the left). a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Texas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina. Note the presence of air bubbles in some of the genitalia presented here. Scale bars: 0.1 mm.

FIGURE 4. Heads of US Syzeton species. a–c and e–g, ♂ heads in frontal view. a, Syzeton arizonae n. sp. ♂ holotype from Arizona. b, S. belovi n. sp. ♂ holotype from Texas. c, S. floridanus (Werner, 1990) ♂ from Florida. d, Syzeton pallidus (Werner, 1990) ♂ from Texas. e, S. signatus (Haldeman, 1848) ♂ from South Carolina. f, S. subfasciatus (LeConte, 1855) ♂ from Mis- souri. Note the difference in interocular space denoted by white double arrows for each species. d and h, ♀ heads in side view. d, S. ater (LeConte, 1875) ♀ from Texas. h, S. ouachitanus (Werner, 1990) ♀ from Mississippi (paratype of Zonantes mississippiensis Werner, 1990). Note the difference in eye size, best seen when comparing the distance from the antennal notch to the edge of the eye, or the space separating the eye from the posterior head margin (white double arrows). Scale bars: 0.1 mm.

FIGURE 5. External morphology of US Syzeton species. a–l, ♂ right foretibia in upper view. a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Texas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina.Arrowheads indicate kinks or other modification of the inner side of the tibias; double black arrow denotes the curve of the tibia. m–n, ♀ antennae with details of antennomere 6–8 (inset). m, S. belovi n. sp. ♀ paratype from Texas. n, S. pallidus (Werner, 1990) ♀ from Texas. o, left hind-leg of S. fasciastus (from Wisconsin) in ventral view (arrow indicates the inflated femur). p–q, pubescence on elytral disc. p, S. belovi n. sp. ♂ holotype from Texas. q, S. arizonae n. sp. ♂ holotype from Arizona. Scale bars: 0.1 mm.