Eupsenius peckorum, Chandler, 2023

Chandler, Donald S., 2023, The Eupsenius LeConte of North America and the Lesser Antilles with Notes on the Brachyglutini Subtribes Eupseniina Park and Baradina Park (Coleoptera: Staphylinidae: Pselaphinae), The Coleopterists Bulletin 77 (3), pp. 397-412 : 405-409

Eupsenius glaber LeConte, 1849 ( Figs. 2 , 7 , 16 )

Eupsenius glaber LeConte 1849: 90 . Holotype female: // [orange disc largely colored by lead pen- cil]/ [red label] Type 6140/ Eupsenius glaber Lec. / [red label] HOLOTYPE Eupsenius glaber LeConte // [MCZC]. Type locality: Columbia , South Carolina. LeConte 1863a: 21. Gemminger and Harold 1868: 693. Raffray 1904: 253. Raffray 1908: 254. Raffray 1911: 110. Brendel 1893: plate 4, figs. 1 and 1a. Brendel and Wickham 1891: 1. Leng 1920: 131. Bowman 1934: 115. Park 1942: 127. Park 1954: 19. Park et al. 1976: 63. Chandler 1997: 69. Peck and Thomas 1998: 40.

Redescribed Male. Gisela Road, Gila County ,

AZ (DSC). Body ( Fig. 7 ) length 1.15, width 0.59;

body and appendages yellow-brown. Head with vertexal foveae large, separated by nearly one foveal diameter; in lateral view with acute median clypeal tubercle extending to near antennal rostrum, in anterior view tubercle bluntly angulate at apex; eye with about 45 facets; median basal indentation of vertex indistinct; antenna 0.34 long, antennomere XI 0.14 long (39% of antennal length), IX about half length of X. Pronotum with antebasal sulcus thin, shallow, most distinct at middle, median antebasal impression indistinct, lateral antebasal foveae punctiform. Metacoxae subcontiguous, slightly separated. Tergites 1–4 with basolateral foveae; tergite 1 disc 0.38 wide, width between discal carinae 0.17 (distance between discal carinae 45% of discal width); ventrite 2 0.14 long, ventrites 3–7 combined 0.16 long at middle. Ventrite 6 with shallow circular impression on median fourth, extending from base to about two-thirds point of tergite length. Aedeagus ( Fig. 2 ) tube-like, shaft curved 180°, in lateral view with short apical and subapical recurved spines on right side.

Female. Ventrite 6 slightly flattened on median fourth of width.

Variation. Body length 1.10–1.15, width 0.47– 0.50; body and appendages yellow-brown to dark brown; eye with 41–51 facets.

Specimens Examined (108). ALABAMA: Blount Co.: Highland Lake, 33.884722, −86.421944, 288 m, X-10-2009 (1, LSAM), VII-10-2009, T. King, UV lt. trap (3, FMNH). Jefferson Co.: Vestavia, VI- 4-1979, T. King, at light (1, FMNH). ARIZONA: Cochise Co. : Chiricahua Mts., Long Park, 9,200′, VII-14/22-2001, molasses baited pitfall (1, LSAM). Chiricahua Mts., SW Research Station, 31°53′, 108°12′, VII-15/22-2001, FIT #2 (1, LSAM), VII-15-2001, flood debris (1, LSAM), VII-15/22-2001, A. Tishechkin, FIT #1 (2, LSAM). Portal Rd., Coronado NF, Chiricahua Mts., 31.90164, −109.24123, VII-30/ VIII-7-2014 (1, LSAM), VII-31/ VIII-7-2014, LSAM Team, FIT (54F) (1, LSAM). Southfork FC, Coronado NF, Chiricahua Mts., 31.85999, −109.18994, VIII-2-2012, C. Carlton, Berlese: CWD5 (56F) (1, LSAM). Gila Co. : 0.8 mi E Hwy. 87 on Gisela Road, 34.0917, −111.3412, VIII-23/ IX-26-2018, W. B. Warner, V-flight intercept trap (1, ASUC). Along Tonto Creek, 0.2 mi S Gisela, 34.0862, −1112874, 284′, VI-21/ VII-6-2018 (1, ASUC), VII-6/21-2018 (3, ASUC). GEORGIA: McIntosh Co.: Sapelo Island, V-9/29-1987, BRC HYM Team, Malaise, forest (2, CNCI); V-29/ VI-20-1987, Malaise, live oak forest (3, DSC). NORTH CAROLINA: Orange Co.: Chapel Hill, XI-21-1979, J. F. Cornell, hardwood litter under logs (1, DSC). SOUTH CAROLINA: Richland Co.: Columbia, D. Zimmerman (1, holotype, MCZC). Spartanburg Co.: Croft State Park, IV-8- 2009, J. and S. Cornell, Berlese logs with Lasius and Formica sp. ants (1, LSAM). TEXAS: Brazos Co.: College Station, Riley Estate, 30.58849, −96.25366, IX-25/ X-4-2013, E. G. Riley (5, EGR). Cameron Co. : 1.5 mi E Jct. FM 1419 on Hwy. 4, E of Brownsville, X-19-2002, B. Raber and E. Riley, UV light (17, EGR; 48, TAMU; 7, DSC). Laguna Atacosa NWR (site 1), 26.22375, −97.35454, IX-19-2009, J. King and E. Riley, UV light, dense coastal brush (1, TAMU). Jefferson Co.: Sea Rim St. Park, I-13-1992, S. M. and B. D. Clark (1, WVDA). Wood Co.: Little Sandy Nat. Wildlife Refuge, 5 km W Hawkins, IX-19-1998, J. D. Oswald, MV light, old growth Sabine River flood- plain forest (1, DSC; 1, TAMU). Note: Over half of the specimens examined are from Cameron County in southern Texas.

Distribution ( Fig. 16 ). Found in the southern coastal states from North Carolina to Texas and now known from southern Arizona. One female from southern Illinois is possibly this species. Brendel and Wickham (1891) recorded this species from

Louisiana, but specimens seen from this state have all been E. dilatatus . Most literature records for this species are likely or certainly errors for E. peckorum or E. dilatatus , and for that reason the references dealing with subsequent new locality records following the original description are not cited above. The record of E. glaber from the Bahamas ( Park 1954) is based on two females. One female was examined (FMNH). It is a bit large for E. glaber , and this placement is not confirmed here.

Comments. The small size (1.1–1.2 mm) is helpful in suggesting the identity of this widespread but rarely taken species. The antebasal sulcus of the pronotum is thin and shallow yet usually distinct, the vertexal foveae are large and separated by nearly a foveal diameter, and the median indentation of the head base is indistinct. The male genitalia ( Fig. 2 ) are distinctive in having a small apical and subapical recurved spine on the right side, which are best seen in a dorsolateral view.

Eupsenius peckorum Chandler , new species zoobank.org/ urn:lsid:zoobank.org:act:B3272C11-13EA-456A-ACCB-54A43697C88E ( Figs. 3 , 8 , 16 )

Holotype, Male. // FLA: Monroe Co., S 25, Sugarloaf Key, Kitchings, 19.XI.85-26.II.86, S&J Peck, hammock for. Malaise-FIT [“trough” handwritten on underside of label]/ [red label] HOLOTYPE Eupsenius peckorum Chandler // ( CNCI) .

Holotype Description. Body ( Fig. 8 ) length 1.13, width 0.47, body brown, appendages yellow-brown. Head with vertexal foveae moderate in size, separated by about 1.5× their diameter; in lateral view with clypeus bearing acutely pointed tubercle that nearly contacts apex of antennal rostrum, in anterior view tubercle apex more broadly rounded; eye with about 60 facets; median basal indentation of vertex distinct, margins sharply defined; antenna 0.32 long, antennomere XI 0.13 long (38.9% of antennal length), IX less than half length of X. Pronotum with antebasal sulcus indicated by dark line, sulcus not impressed laterally, with median impression broad and shallow, antebasal sulcus weakly defined but distinct in median impression, lateral antebasal foveae present as minute pit. Metacoxae subcontiguous, slightly separated. Tergite 1 with basolateral foveae, tergites 2–4 with shallow circular basolateral impressions rather than distinct foveae, disc of tergite 1 0.36 wide, width between discal carinae 0.14 (distance between discal carinae 40% of discal width); ventrite 2 0.13 long at middle, ventrites 3–7 combined 0.14 long; ventrite 6 with faint circular impression covering medial third of ventrite, extending from base to apex of ventrite. Aedeagus ( Fig. 3 ) tube-like, shaft curved 180°, in lateral view with dorsal left apex with digitiform projection.

Female. Ventrite 6 shallowly and evenly convex, disc moderately punctate.

Variation. Body length from localities north of central Florida 1.25–1.44, width 0.50–0.52; body length from localities of southern Florida to Florida Keys 1.18–1.20, width 0.47–0.49 mm; body yellow-brown to brown.

Type Specimens Examined. Holotype and 75 paratypes. FLORIDA: Alachua Co. : 2.6 mi SW Archer, X-19/27-1990, P. Skelley, window trap, old pasture in sandhill (F, FSCA). Gainesville, III-4- 1967, D. L. Mays, UV light (F, FMNH), VIII-1- 1956, F. Mead, at light (M, FMNH), VII-11/18-1966, J. F. Cornell, UV light (F, LSAM), VIII-24-1959, R. E. Woodruff (M, FMNH). Island Grove (S), VIII-22-1965, litter at log (F, FMNH). Baker Co.: Macleanny (5 mi N), VIII-18-1965, W. Suter, pine buttress (F, FMNH). Brevard Co.: Hatcliff St. Park, on St. Rd. 46, IX-12-1987, Watts, Matthews and Lott, at lt. (F, DSC). Collier Co.: Ochopee, V-26- 1976, C. W. O’Brien, UV light (M, DSC). Columbia Co. : Oleno State Park, V-26-1970 (M, DSC). Gadsden Co.: 5 mi SE Havana, VII-29-1977, L. Justice and E. Healy, Berlese mixed hardwood litter (F, DSC). Gilchrist Co.: Santa Fe River, 4 mi S Ft. White, VII-11-1986, Brigham and Huggins, blacklight (M, LSAM). Highlands Co.: Archbold Biological Station, III-23-1975, J. L. Bengtson, at light (F, FMNH), I-8-1975 (F, FMNH), VIII-13- 1975, W. Suter, at light (M, FMNH); XI-15-1998, M. Deyrup (M, ABSC). Highlands Hammock, 6 km W Sebring, VIII-23/24-1949, H. S. Dybas (M, F, FMNH). Lake Placid (5 mi S), Archbold Biological Station, VIII-24-1965, at light (F, FMNH), I-9-1975, W. Suter, lake shore debris (F, FMNH). Lake Placid, Archbold Biological Station, VIII-24-1965, H. R. Steeves, Jr., at light (M, FMNH). Parker Islands, Lake Placid (7 mi SE), VIII-3-1955, H. S. Dybas, Berlese rotten stump cut sabal palmetto (F, FMNH). Hillsborough Co.: Tampa, IV-24 (F, MCZC). Indian River Co. : S of Vero Beach, IX-23-1976, J. H. Frank, blacklight trap (M, UNHC). Vero Beach, XII-11-1980, L. E. Watrous, lt. in mangrove swamp (2F, FMNH). Lee Co.: Fort Myers, VI-17-1965, W. Suter, punk tree (M, FMNH). Leon Co.: Chaires, VIII-29-1965, W. Suter, sawdust berlese (F, FMNH). Tall Timbers Research Station, IX-25-1975, C. W. O’Brien, UV light (M, DSC). Tallahassee, IX-29- 1977, C. W. O’Brien and Marshall, Berlese mixed hardwood litter (F, DSC). Marion Co.: Ocala N. Forest, 1 mi E FR 86 and 97, VII-25-2014 (M, KES). Miami-Dade Co.: Everglades Nat. Park, Long Pine Key, VI-8/ VIII-26-1987, S. and J. Peck, pineland, 3 Malaise-FITs (M, DSC). Chapman Field, IX-10-2015, K. E. Schnepp, at light (F, KES). Monroe Co.: N Key Largo, III-23-1987, M. Deyrup (3F, ABSC). Big Pine Key, N end, X-1990, E. Peck, UV light trap, mangrove-transition (4M, F, DSC). Big Pine Key, S1, T67S, R29E, VII-30/ XI-17-1985, S. and J. Peck, Cactus Hammock forest, MalaiseFIT (2F, UNHC). Big Pine Key, Watsons Hammock, VIII-1/ XI-17-1985, S. and J. Peck, FIT-malaise hardwood ham. (M, UNHC). John Pennekamp Coral Reef St. Park, N. Key Largo, Skeet Shoot Road, V-28-1997 (M, LSAM), V-29-1997, P. E. Skelley, blacklight trap (M, LSAM). N Big Pine Key, X-1989, E. Peck, UV trap, transition forest, 90-11 (2M, DSC). N Key Largo, III-23-1987, M. Deyrup, in tussock of Sporobolus salt marsh (F, LSAM). Snake Bight Trail, Everglades National Park, VIII-27-1965, W. Suter, under bush at canal (M, FMNH). Sugarloaf Key, Kitchings, VIII-4/ XI-19-1985, hammock forest, Malaise-FIT (2M, DSC), XI-19-1985 / II-26-1986, hammock for. Malaise-FIT, S25 (3M, DSC), VI-6/ VIII-29-1986, hammock forest, Malaise-FIT, 86-30 (M, F, DSC), XI-19-1985 / II-26-1986, S. and J. Peck, hammock for. MalaiseFIT, trough (2M, F, UNHC). Upper Key Largo, V-14/27-2016, K. E. Schnepp, Lindgren funnel trap (M, KES). Key West, IV-16-1987, J. Wolfe (F, ABSC). Osceola Co. : South Port Park, VI-19-1990, M. Deyrup, highly modified oak-cypress forest (M, ABSC). Palm Beach Co.: Okeelanta (15 mi SE), VI-19-1965, litter at log (M, F, FMNH). Pinellas Co.: Hammock Park, IX-6/7-2003, UV light (F, DSC). Honeymoon Isl., VIII-9/15-2000, Malaise trap (M, DSC), VIII-17/18-2002, UV trap (M, DSC). Walsingham Park, VII-31-1997, M. A. Goodrich, UV light trap (F, DSC). Sarasota Co. : Laurel, VI-17-1965, W. Suter, oak? (M, FMNH), VI-17-1965, W. Suter, palmetto axil (F, FMNH). Myakka River St. Park, VII-25/29-1976, C. W. O’Brien, UV trap (F, DSC). Sanford, IX-22-1933, C. O. Bare (M, FMNH). Suwannee Co.: ~ 7 mi W White Springs, IV-19/ V-16-2017, K. E. Schnepp, Lindgren funnel trap (M, FSCA). Volusia Co. : Daytona Beach, VII-31-1945, G. T. Riegel, at light (M, FMNH). Enterprise, VI-22 (F, MCZC).

Additional, Non-Type Specimens (30). ARIZONA: Gila Co. : along Tonto Creek , 0.2 mi S Gisela, 34.0862, −111.2874, 284′, VII-6/21-2018, W. B. Warner, V-FIT (M, ASUC) . GEORGIA: Charlton Co.: Okefenokee Swamp , VIII-3-1934, R. H. Beamer, at light (F, MCZC) . Clarke Co.: Athens , IX-15-1959, W. Suter (M, FMNH) , W. Suter and J. Wagner, Berlese pine-live oak pseudocrotch (M, FMNH) . Tattnall Co.: Big Hammock NA, N32°51′55′′, W82°02′59′′, VII-7-2007, J. A. MacGown, blacklight in sandhill habitat (2, MEMC) . MAINE: Waldo Co. : Warren Island, Isleboro , VIII-18-2001 (5, MSMC) , VIII-4-2001, S. Hood, pitfall (2, MSMC) , Berlese

10B (M, F, DSC), VIII-11-2001 (M, DSC) , VIII-4- 2001 (2M, F, DSC) . MASSACHUSETTS: Norfolk Co.: Grape Island , 42°16′2.8′′, 70°55′26.6′′, VIII-14/22-2008, J. McCarron, pitfall trap (2M, DSC) ; VI-25/ VII-1-2008, A. Clark, pitfall trap (M, MCZC) ; VIII-14/22-2008, J. McCarron, pitfall trap (3M, MCZC) ; VI-12/25-2008, J. Rykken, pitfall trap (3M, MCZC) . TENNESSEE: Knox Co.: Knoxville , IX-15- 1956, H. and A. Howden, light (M, FMNH) . VIRGINIA: Norfolk City: Norfolk , IX-1/2-2002, C. A. Springer, UV light (F, DSC) .

Distribution ( Fig. 16 ). Found in the Atlantic coastal states, ranging from Maine to the Florida Keys, with single specimens taken in eastern Tennessee and southern Arizona. The northern records of this species (Warren Island, Maine, and Boston Harbor, Massachusetts) are areas where there is a history of the importation of potted/ container-borne plants from the southern states, and Norfolk, Virginia is a major port. It is curious that both E. glaber and E. peckorum were taken near the same Arizona locality (different locations near Gisela).

Comments. The tubular male genitalia ( Fig. 3 ) with a single, digitiform projection at the left apex is most similar to that of E. dilatatus , which has two acute apical points. The lateral portions of the pronotal antebasal sulcus are indistinct. Medially the sulcus is weakly present for both species, while E. peckorum has the mediobasal indentation of the head more distinct. Specimens from the southern half of Florida, especially the Florida Keys, are small and approach the maximum length of E. glaber , while those from north of this area are larger and overlap in length with E. dilatatus .

Etymology. Named for Stewart Peck and Jarmila Kukalová-Peck, who over a period of many years contributed immensely to the knowledge of the beetles of the southeastern United States and the Caribbean Islands.

Eupsenius rileyi Chandler , new species zoobank.org/ urn:lsid:zoobank.org:act:7B9AB9A4-D50D-40E1-B6EC-FF48E2B781E1 ( Figs. 4 , 9 , 15 )

Holotype, Male. // USA: TEXAS: Hidalgo Co., Bentsen R.G.V.S.P. (Site 1), 26.17830°N, 98.38577°W, IX-6-19-2008, FIT-ground, J. King & E. Riley-0104, cedar elm forest/ [yellow label] Macropod photo / HOLOTYPE Eupsenius rileyi Chandler // ( TAMU) .

Holotype Description. Body ( Fig. 9 ) length 0.96, width 0.36; body yellow-brown. Head with vertexal foveae small, separated by about 2× their diameter; in anterior view clypeal apex truncate, broadly meeting antennal rostrum; eye with about 75 facets; median basal indentation of vertex faint; antenna 0.29 long, antennomere XI 0.13 long (43% of antennal length), X slightly longer than IX. Pronotum with antebasal sulcus indicated by dark line, antebasal sulcus weakly indicated for median third, lacking median impression, sulcus indistinct laterally, lateral antebasal foveae indistinct. Tergite 1 with basolateral foveae reduced to pits, tergite 1 disc 0.31 wide, width between discal carinae 0.11 (35% of discal width); ventrite 2 with distinct basolateral foveae, 0.11 long, length of ventrites 3–7 cannot be determined, all lacking basolateral foveae; ventrite 6 with small shallow median impression.Aedeagus ( Fig. 4 ) with shaft abruptly angled 90°, apical portion broadly horizontal.

Female. Unknown.

Variation. Eye with 75–79 facets.

Additional Specimen Examined. Paratype male: // USA: TEXAS: Hidalgo Co., FRGVNWR, La Coma (site 2), 26.05611°N, 98.03635°W, IX-5- 2009, UV light, J. King & E. Riley-1067, revege- tated site ( TAMU) .

Distribution ( Fig. 15 ). Known only from Hidalgo County in southern Texas, which is adjacent to the border with Mexico.

Comments. The form of the male genitalia ( Fig. 4 ) sets this species apart from the North American fauna, as it is not so strongly curved nor tubular, and the internal sac does not obscure the broad apex. The vertexal foveae are small, separated by two foveal diameters, and the truncate apex of the clypeal tubercle broadly meets the antennal rostrum. It is the most slender and shortest species for North America, particularly notable when compared with E. dilatatus . These features place this species near E. grouvellei based on provisionally identified specimens from Tamaulipas, Mexico, and the two are separated by differences in their aedeagal apices.

Etymology. Named for Edward G. Riley, who with colleagues contributed many specimens of Eupsenius from Texas.

Figures

Figs. 1–5. Eupsenius species, lateral and apicodorsal views of aedeagus. 1) E. dilatatus; 2) E. glaber; 3) E. peckorum, new species; 4) E. rileyi, new species; 5) E. politus.

Figs. 6–14. Eupsenius species, dorsal habitus photos and E. politus distribution map. 6) E. dilatatus; 7) E. glaber; 8) E. peckorum, new species; 9) E. rileyi, new species; 10) E. politus. Eupsenina raffrayi: 11) Dorsal habitus; 12) Anterior view. 13) Eupsenina undescribed species, dorsal habitus. 14) Distribution of Eupsenius politus.

Fig. 16. Distribution of E. glaber and E. rileyi, new species.

Fig. 15. Distribution of E. dilatatus and E. peckorum, new species.