Tomarus roigjunenti Neita and Ratcliffe, 2017

Neita-Moreno, Jhon César, Alexander, Recursos Biológicos, Agustín, San, de, Villa, Leyva, Boyacá, Ratcliffe, Brett C., Collections, Systematics Research, of, University, Museum, Nebraska State, Hall, Nebraska, of, University, Nebraska, Lincoln, Ne & Usa, 2017, The genus Tomarus Erichson (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini) in Argentina, Chile, and Uruguay, Insecta Mundi 2017 (547), pp. 1-36 : 8-10

Tomarus roigjunenti Neita and Ratcliffe , New Species

( Fig. 1e–f , 4e , 5e , 6i–j , 7e , 8e , 10i–j , 11e , 12e , 13e , 14e , 15e , 17a )

Holotype male labeled: “VATRA LAUFQUEN / 14580 M.S.N.M/Neuquén-Arg. / 13-XI-69 / Leg. M. Gentili ”, and with our red holotype label [ IADIZA] . Allotype female labeled: “ R. A. Neuquén / 5 km. S de Lag. Blanca / 15/01/2007 / G. San Blas Col. / 39°06´56.1´´S/70°00´10.1´´W. / 1975 msnm”, and with our red allotype label [ IADIZA] . Paratypes labeled: “Buenos Aires: Prov. de / Buenos Aires / J. Boso Col.” (3 males, 1 female) [ MLPA]. “Buenos Aires” (5 males, 5 females) [ MLPA]. “Chubut: Chubut” (1 male) [ MACN]. “Mendoza: RA. Mendoza / Uspallata / Enero 1975 / S. Roig” (1 male) [ IADIZA]. “Mendoza / Tunuyan / I-1940 ” (1 male) [ MLPA]. “Neuquén: Neuquén / Covunco / 19-XII-1963 ” (1 male) [ IADIZA]. “R. A. Neuquén / Barrancas / 5-1970 Col. A. Roig / CE 00283” (1 female) [ IADIZA]. “Covunco / Neuquén-Arg. / 29-X-62 / Leg. M. Gentili” (1 male) [ IADIZA]. “Neuquén / L. Victoria / Febr. 1958” (1 female) [ IADIZA]. “Neuquén / Covunco / 19-XII-1963 ” (1 male) [ IADIZA]. “ 8-XII-1955 / Collón Cura/ Pcio. Neuquén / Leg. S. Sochajovskoy” (2 females) [ MLPA]. “Río Negro: Arg. Río Negro /Gral. Rocas / Cnia. Catriel 311 m / S. Roig / G. Flores /04/I/05 // 37°52´83´´ S/67°50´16´´W” (3 males, 1 female) [IA- DIZA]. “REP. ARGENTINA / Río Negro / H. Ritcher” (7 males, 1 female) [ MLPA]. “ III-5-1929 / S.O. / Río Negro” (1 female) [ MACN]. “Río Negro / Allen” (1 female) [ MACN]. No Data (3 females) [ MACN]. “Col. Breyer” (1 male) [ MACN]. “REP. ARGENTINA / A. BREYER / Col. Breyer” (1 male) [ MACN]. “ Neuquen / Capital / i.iii.961 // Argentina / 1968 colln. / J. Daguerre” (1 male, 1 female) [ USNM]. “21- II-60 / Cipolletti / Prov Río Negro / lg. S. Schajovskoy / Howden coll. ex. / A. Martínez coll.” (4 males, 2 females) [ CMNC, BCRC]. “ 24-XI-1955 / Villa Regina / Pcia. Rio-Negro / Lg. E. Fleiss // Howden coll. ex. / A. Martínez coll. // Lgyrus [sic] (T.) / gyas / niger / (Blanch.) / A. MARTÍNEZ-DET. 1990” (1 male) [ CMNC]. Paratypes each with our yellow paratype label.

Description of Holotype. Length 26.8 mm; width 13.0 mm. Color dark reddish brown to black. Head: Frons and clypeus coarsely rugose. Frontoclypeal region with 2 distinctly transverse tubercles; tubercles broadly separated, usually about 3 tubercle diameters apart ( Fig. 4e ). Clypeus strongly rugopunctate to transversely rugose, tapering to slightly emarginate, broad apex with 2 reflexed teeth. Mandibles with 2 teeth, apical tooth subacute, subapical notch narrow ( Fig. 6i–j ); labium with lateral edge densely setose, paraglossa developed, apex slightly concave at center ( Fig. 7e ); maxilla with galea developed and with 6 teeth ( Fig. 5e ). Pronotum: Surface on disc moderately punctate, sides and anterior angles densely punctate to rugopunctate; punctures moderate in size on disc, becoming larger laterally; fovea rugose within. Anterior margin with a strong, median tubercle; fovea small, narrower than distance between eyes ( Fig. 8e ). Elytra: Surface densely punctate; punctures mostly moderately in size with sparser, minute punctures between larger punctures; larger punctures usually ocellate, some in double rows and with 3 pairs of double rows. Pygidium: Surface densely punctate, punctures becoming denser in basal and lateral angles; punctures small to moderate in size, weakly ocellate; in lateral view with convex surface. Legs: Protibia tridentate and with weak, basal convexity suggestive of 4 th tooth, teeth subequally spaced from each other. Protarsus simple, not enlarged. Mesotibia on transverse carinae with spinules densely (subcontiguous) to broadly (separated by 1 spinule diameter) spaced ( Fig. 10i–j ). Metatibia with 1 basal, transverse carina interrupted at middle (carina with spine-like setae) and 1 medial, transverse carina at middle; apex with about 21 spinules ( Fig. 10j ). Venter: Prosternal process long, thick, apex longitudinally oval. Mesosternal surface glabrous, slightly concave at middle. Metasternal surface with sparse, ocellate punctures. Male Genitalia: Parameres ( Fig. 11e , 12e , 13e ) subtriangular, shaft strongly narrowed to apices, mid-shaft with large, curved tooth extending laterally. Internal sac with 3 copulatory lamellae ( Fig. 15e ).

Allotype Female. Length 27.5 mm; width 13.9 mm. Similar to male, but pronotal surface with punctures slightly less dense, pygidial surface weakly convex. Gonocoxite larger than gonocoxal sternite, with a semicircular furrow (14e).

Paratypes. Length 26.3–27.5 mm; width 12.9–13.9 mm. The 32 male and 20 female paratypes do not significantly differ from their respective primary type other than slight differences in size.

Etymology. This species is named in honor of Dr. Sergio Roig-Juñent in recognition of his invaluable entomological research in Argentina.

Distribution. Tomarus roigjunenti occurs in the provinces of Mendoza, Neuquén, and Río Negro in Argentina.

Locality Records ( Fig. 17a ). 52 specimens examined (see type information above).

Temporal Distribution. January (7), February (5), March (4), May (1), October (1), November (2), December (3).

Diagnosis. Tomarus roigjunenti is externally similar to T. gyas and T. rosettae . In T. roigjunenti , the apex of the labium is slightly concave ( Fig. 7e ), while in T. gyas the labium has a small notch ( Fig. 7c ) and in T. rosettae there is a small tooth ( Fig. 7f ). The clypeal teeth are distinctly separated in T. rosettae and T. gyas ( Fig. 4c, f ) but nearly contiguous in T. roigjunenti ( Fig. 4e ). The tubercles on the head are relatively close together in T. maimon , T. rosettae , and T. roigjunenti ( Fig. 4d–f ) but widely separated from each other in T. gyas ( Fig. 4c ). The pronotal fovea is narrow or nearly obsolete in T. maimon , T. rosettae , and T. roigjunenti ( Fig. 8d–f ) but nearly round and usally as wide as the distance between the eyes (rarely less) in T. gyas ( Fig. 8c ). The protibia has three teeth in T. maimon ( Fig. 9b ) and 4 teeth in T. gyas , T. rosettae , and T. roigjunenti ( Fig. 9a ). The parameres are different among the species (compare Fig. 11c , 12c , 13c ; 11d , 12d , 13d ; 11e , 12e , 13e , and 11f , 12f , 13f ). The internal sac of T. maimon , T. roigjunenti and T. rosettae has three copulatory lamellae ( Fig. 15d–f ), but in T. gyas there are five lamellae ( Fig. 15c ).

Life History. Adults are attracted to lights at night. Some specimens have been taken in sand dunes.

Figures

Figure 1. Habitus of Tomarus spp. a) Tomarus bidentulus (Fairmaire) dorsal view. b) Tomarus burmeisteri (Steinheil) dorsal view. c) Tomarus gyas Erichson dorsal view. d) Tomarus rosettae (Endrödi) dorsal view. e) Tomarus roigjunenti n. sp. dorsal view, holotype. f) Tomarus roigjunenti n. sp. dorsal view, allotype.

Figure 4. Head, dorsal view of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 5. Maxilla, ventral view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 6. Mandibles, ventral view, of Tomarus spp. a–b) T. bidentulus. c–d) T. burmeisteri. e–f) T. gyas. g–h) T. maimon. i–j. T. roigjunenti n. sp. k–l. T. rosettae. m–n. T. spinipenis n. sp. o–p. T. villosus.

Figure 7. Labium, dorsal view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 8. Pronotum, dorsal view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 9. Protibia, dorsal view, of Tomarus spp. a) T. gyas and b) T. maimon.

Figure 10. Meso- and metatibia, dorsal view, of Tomarus spp. a–b) T. bidentulus. c–d) T. burmeisteri. e–f) T. gyas. g–h) T. maimon. i–j. T. roigjunenti n. sp. k–l. T. rosettae. m–n. T. spinipenis n. sp. o–p. T. villosus.

Figure 11. Parameres, caudal view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 12. Parameres, lateral view, of: a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 13. Parameres, anterior view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus.

Figure 14. Gonocoxite, ventral view, of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus. Components are: (Gx) gonocoxite), (Gs) gonocoxal sternite.

Figure 15. Internal sac of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. gyas. d) T. maimon. e) T. roigjunenti n. sp. f) T. rosettae. g) T. spinipenis n. sp. h) T. villosus. Components are: (AL) accessory lamella, (CL) copulatory lamella (CL), (Ra) raspula, (Esp) speculum, and (Fg) a complex, spike-like flagellum that varies in length and thickness.

Figure 17. Distribution of Tomarus spp. a) T. roigjunenti n. sp. b) T. rosettae. c) T. spinipenis n. sp. d) T. villosus.