Fornax lucidicollis Otto, 2020

Otto, Robert L., 2020, A review of the Nearctic species of Fornax Laporte (Coleoptera: Eucnemidae: Macraulacinae: Macraulacini) with descriptions of six new species, Insecta Mundi 2020 (818), pp. 1-26 : 18-21

Fornax lucidicollis Otto , new species

Fig. 30–34

Diagnosis. Shiny pronotal surface with shallowly indicated sculpture distinguishes F. lucidicollis new species from all Fornax species present in the United States.

Type material. Male holotype. “ USA ARLittleRock, May 30th, 2001, Blacklight Trap, Brian Baldwin” / “ HOLO- TYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [red printed label]. Female allotype. “ Florida: Suwanee Co., ~ 7 miles W White Springs, May 16–June 20, 2017, Kyle E. Schnepp” / “ ALLOTYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label]. Holotype is transferred from GERP to CMNH. Allotype is deposited in KESC.

Paratypes. 14 ♂♂, 8 ♀♀: ARKANSAS: 1 ♂, “Prairie Co., 7 1 1926 Ark., T.E. White” / “ Fornax , bicolor (Mels.) , J. Muona det. 1980” (folded; “ bicolor (Mels.) ” handwritten on label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SEMC); 1 ♂, “USA ARLittleRock, May 30th, 2001, Blacklight Trap, Brian Baldwin” / “ EUCNEMIDAE , Macraulacinae , Fornax , bicolor (Mels) , Det. R.L. Otto” (folded) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♀, “USA ARLittleRock, June 9th, 2001, Blacklight Trap, Brian Baldwin” / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♀, “ ARKANSAS Garland, FS Camp- Clearfork, 19 June 2009, U.V. Light Traps, Brian Baldwin” / “ Onichodon , downiei, A. Tishechkin det. 2013” (species name and year handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “AR Garland Co, FS CampClearfork, VI/12/05UVLights, Brian Baldwin” / “ Onichodon , downiei, Muona, A. Tishechkin det. 2005” (species and author name handwritten) / “1 kept.” (handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “ ARKANSAS Polk Co, Mena 13June 2008, U.V. Light Traps, Brian Baldwin” / “ Onichodon , downiei, Muona, A. Tishechkin det. 2013” (species, author and year handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♀, “ ARKANSAS Polk Co, Mena May 30 2010, U.V. Light Traps, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (“ Fornax ”, “bicolor” and “5” handwritten) / “kept 1” (handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “ ARKANSAS Polk Co, Mena May 30 2010, U.V. Light Traps, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (“ Fornax ”, “bicolor” and “5” handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( LSUIC); 1 ♀, “ ARKANSAS Polk Co, Mena 7 June 2010, U.V. Light Traps, Brian Baldwin” / “ Onichodon , downiei, A. Tishechkin det. 2013” (species name and year handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 (♀ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “ ARKANSAS Garland, Jessieville, June 10th, 2011, U.V. Light Trap, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (“ Fornax ”, “bicolor” and “5” handwritten) / “ PARA- TYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( LSUIC); 1♀, “ ARKANSAS GARLAND, LakeOuachitaStPk, June 23, 2011, U.V. Light Trap, Caitlin Conn” / Fornax , bicolor, A.K.Tishechkin det. 2015” (“ Fornax ” “bicolor” and “5” handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “ ARKANSAS GARLAND, FS CampClearfork, June 9th, 2012, U.V. Light Trap, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (“ Fornax ”, “bicolor” and “5” handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( LSUIC); 1 ♂, “ ARKANSAS Garland, FS CampClearfork, June 20th, 2013, U.V. Light traps, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (binomial name and year handwritten) / “kept 1” (handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SNMC); 1 ♂, “ ARKANSAS Garland, Jessieville, June 26th, 2013, U.V. Light trap, Brian Baldwin” / “ Fornax , bicolor, A.K.Tishechkin det. 2015” (binomial name and year handwritten) / “kept 1” (handwritten) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( SNMC); FLORIDA: 1 ♂, “ FLORIDA: Alachua Co., Gainesville, Hogtown, Creek & I-75, 18-V-1988, P. Skelley, Blacklight trap” / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( FSCA); 1 ♂, “USA FLORIDA Alachua Co., Paynes Prairie St. Pres., 28-IV-96, Coll.: Robert Vigneault” / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( GERP); NEW JERSEY: 1 ♀, “ NEW JERSEY: Atlantic, Co, 5.5km N Corbin City, 39.35293, −74.74737, 9m, 17 Jun–2 Jul 2019, LFT, T. James, BSF#85360” / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2020 ” (♀ handwritten behind species name on label) [yellow printed label] ( CMNH); TEXAS: 1 ♂, “ TEXAS: Brazos Co., College Station, Lick, Creek Pk., V-5-2002, E.G. Riley, UV” / “EGRC” (blue printed label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( EGRC); 1 ♂, “USA: TEXAS: Brazos Co., College Sta., Riley Estate, 30°35 ′ 18″N, 96°15 ′ 12″W, VIII-2003, E.G. Riley” / “EGRC” (blue printed label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( EGRC); 1 ♀, “USA: TEXAS: Brazos Co., College Sta., Riley Estate, 30°35 ′ 18″N, 96°15 ′ 12″W, V-17-2005, E. Riley, UV” / “EGRC” (blue printed label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( EGRC); 1 ♀, “USA: TEXAS: Brazos Co., College Sta., Riley Estate, 30°58849°N, 96°25366°W, V-2–8-2009, E. Riley, UV” / “ Fornax , bicolor, (Melsheimer) , Det. R.G. Riley, 2011” / “EGRC” (blue printed label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♀ handwritten behind species name on label) [yellow printed label] ( EGRC); 1 ♂, “USA: TEXAS: Brazos Co., College Sta., Riley Estate, 30.58849°N, 96.25366°W, V-24–31-2010, E. Riley, UV” / “EGRC” (blue printed label) / “ PARATYPE:, Fornax , lucidicollis, Otto, Det. R.L. Otto, 2018 ” (♂ handwritten behind species name on label) [yellow printed label] ( EGRC). Paratypes are deposited in CMNH, EGRC, FSCA, GERP, LSUIC, SEMC and SNMC.

Description. Male holotype. Length 7.5 mm. Width 2.0 mm. Body subcylindrical, elongate; uniformly dark brown; scape slightly darker brown, pedicel and antennomeres III–XI reddish-brown; legs including tarsi reddish-brown; head, pronotum and elytra clothed with short, recumbent yellowish setae ( Fig. 30 ). Head: Subspherical; integument rugose, shiny; frons convex, without median carina or fovea above frontoclypeal region; apical margin of frontoclypeal region rounded, about 2 times wider than base; horizontal interantennal carina absent; mandibles stout, bidentate, densely punctate. Antenna: Filiform from antennomeres III–XI, attaining nearly 1/2 of body length; antennomeres III–X subequal, longer than wide; antennomere XI slightly longer than X. Pronotum: Integument shiny, densely and shallowly rugose to granulate; wider than long, with moderate, sharp hind angles; sides parallel-sided in basal 2/3, strongly narrowing anteriorly; disc convex, without shallow median groove or circular fovea; base sinuous, with pair of transverse, circular depressions above scutellar shield. Scutellar shield: Somewhat short, subtriangular, setose, shallowly punctate and distally rounded. Elytra: Distinctly striate, deepest at humeral region; interstices slightly elevated; integument shiny, transversely rugose near humeri; punctures shallower and crowded elsewhere. Legs: First tarsomere as long as combined lengths of remaining four on meso- and metatarsi; tibiae rounded in cross-section; metatarsomeres I–III simple; metatarsomere IV excavated, truncated; metatarsomere V elongate, with basally toothed claws. Venter ( Fig. 31 ): Closely punctate, with elongate, recumbent yellowish setae; hypomeron with basally open lateral antennal grooves; metepisterna parallel-sided; elytral epipleura shiny, grooved throughout, without punctures; metacoxal plates medially more than 6.0 times wider than laterally; last abdominal ventrite apically produced, short, wide.

Female allotype ( Fig. 32 ). 10.0 mm long; antennae filiform, reaching presumably nearly 1/2 of body length; legs and antennae dark reddish-brown, slightly lighter than habitus; pronotum parallel-sided in basal 2/3, narrowing anteriorly in apical 1/3; last abdominal ventrite apically produced, short, narrow.

Aedeagus (paratype) ( Fig. 33–34 ). Basal piece slightly longer than wide, parallel-sided, dorsally open, basally truncate; remaining parts elongate, apically wide, angularly constricted at base of parameres, apically lobed;

median lobe short and stout, apically rounded, narrowly bifid; parameres elongate, laterally unsclerotized, with a minute hook-like lateral tooth near base.

Variation. Fourteen male and eight female paratypes were examined. The male paratypes are 7.0–10.0 mm long and 2.0–3.0 mm wide. The female paratypes are 9.0–13.0 mm long and 2.0– 3.5 mm wide, all longer than the holotype. Two examined male and one female paratypes are reddish brown, possibly teneral at the time of collection. Delicate, shallow median groove is present on the pronotal disc of four female and nine male specimens. The median groove is absent in the other four female and five male specimens.

Distribution. This species is known from Arkansas, Florida and Texas in southeastern United States. A single specimen comes from New Jersey in northeastern United States.

Biology. Nine specimens were taken from blacklight traps placed in Arkansas, Florida and Texas. One specimen was taken from a Lindgren funnel trap placed in southern New Jersey. Developmental stages remain unknown.

Etymology. The specific name is derived from a combination of two Latin words, ‘lucidum’ for shiny and the root ‘–collis’ for the shiny surface of the pronotum.

Note. Muona (2000) wrote that a specimen collected in Alabama differs from other examined F. bicolor specimens in its structure of the integument. It may be possible the specimen in question could be that of F. lucidicollis new species. I have not studied the Alabama specimen.

Figures

Figures 30–34. Fornax lucidicollis Otto, sp. nov. 30) Male holotype, dorsal habitus. 31) Male holotype, ventral habitus. 32) Female allotype, dorsal habitus. 33) Male paratype, aedeagus, dorsal view. 34) Male paratype, aedeagus, lateral view. (Scale: 30–34 = 1.0 mm.)