Tomarus maimon Erichson, 1847

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 : 7-8

Tomarus maimon Erichson, 1847

( Fig. 3h , 4d , 5d , 6g –h , 7d , 8d , 9b , 10g –h , 11d , 12d , 13d , 14d , 15d , 16c )

Tomarus maimon Erichson 1847: 96 (original combination).

Heteronychus fossator Burmeister 1847:101 (synonym).

Redescription. Male. Length 22.0–26.0 mm; width 11.0–12.0 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 4 tubercle diameters apart ( Fig. 4d ). Clypeus strongly rugopunctate to transversely rugose, tapering to broad apex with 2 nearly contiguous, reflexed teeth. Mandibles with 2 teeth, apical tooth subtruncate or rounded, subapical notch relatively narrow ( Fig. 6g –h ); labium with lateral edge densely setose, base setose, paraglossa developed, apex slightly convex at center ( Fig. 7d ); maxilla with galea developed and with 6 teeth ( Fig. 5d ). Pronotum: Surface with disc moderately punctate, sides and anterior angles densely punctate to rugopunctate; punctures moderate in size on disc, becoming large laterally; fovea rugose within. Anterior margin with small, median tubercle and with small, narrow fovea (narrower than distance between eyes) ( Fig. 8d ). Elytra: Surface densely punctate; punctures mostly moderate in size with sparser, minute punctures between larger punctures; larger punctures usually ocellate, 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, male with convex surface, females with weakly convex surface. Legs: Protibia tridentate, teeth subequally spaced from each other ( Fig. 9b ). Protarsus in male simple, not enlarged. Mesotibia on transverse carinae with long, slender spinules ( Fig. 10g –h ). Metatibia with 1 basal, transverse carina interrupted at middle (carina with spine-like setae) and 1 medial, transverse carina; apex truncate with about 21 spinules ( Fig. 10h ). Venter: Prosternal process long, thick, apex longitudinally oval. Mesosternal surface glabrous, slightly concave at middle. Metasternal surface with sparse, ocellate punctures ( Fig. 2f ). Male Genitalia: Parameres ( Fig. 11d , 12d , 13d ) subtriangular, but apical half of shaft parallel, apices blunt. Internal sac with 3 copulatory lamellae ( Fig. 15d ).

Female. Length 23.1–28.2 mm; width: 10.8–13.6 mm. Similar to male, but pronotal surface with punctures slightly less dense than in males. Gonocoxite larger than gonocoxal sternite, with a semicircular furrow ( Fig. 14d ).

Figures

Figure 2. Habitus of Tomarus spp. a) Tomarus rosettae (Endrödi) dorsal view. b) Tomarus spinipenis n. sp. dorsal view, holotype. c) Tomarus spinipenis dorsal view, allotype. d) Tomarus burmeisteri (Steinheil) dorsal view. e) Tomarus villosus (Burmeister) ventral view. f) Tomarus gyas ventral view. g) Tomarus bidentulus (Fairmaire) abdomen segments, ventral view (female). h) Tomarus bidentulus abdomen segments, ventral view (male).

Figure 3. Types of Tomarus spp. a) T. bidentulus female holotype, dorsal view. b) T. burmeisteri male holotype, dorsal view. c) T. burmeisteri male holotype, lateral view. d) T. burmeisteri male holotype parameres, caudal view. e) T. burmeisteri male holotype parameres (lateral view). f) Label for T. burmeisteri holotype. g) T. gyas male holotype, dorsal view and labels and parameres, caudal view). h) T. maimon holotype, dorsal view. i) T. rosettae male holotype, dorsal view. j) T. villosus male holotype, dorsal view. k) T. villosus male holotype, dorsal view of head. l) T. villosus male holotype, parameres, caudal view. m) Label for T. villosus holotype.

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 16. Distribution of Tomarus spp. a) T. bidentulus. b) T. burmeisteri. c) T. maimon. d) T. gyas.