Bolbapium sampaioorum Carvalho, 2022

Carvalho, Edrielly Carolinne & Vaz-de-Mello, Fernando Z., 2022, A taxonomic revision of Bolbapium Boucomont, 1910 (Coleoptera: Scarabaeoidea: Geotrupidae), Journal of Natural History 56 (13 - 16), pp. 769-828 : 815-817

Bolbapium sampaioorum Carvalho and Vaz-de-Mello, sp. nov.

( Figures 6 (e), 11(g), (h), (i), 15(b))

Diagnosis

Frons with tubercle wider than long adjacent to each eye. Pronotum mesoanteriorly with almost rectangular structure in dorsal view ( Figure 6 (e)).

Etymology. Named after Isadora Sampaio and Henrique Sampaio, beloved sister and brother of the first author.

Type locality. Tangará da Serra, Mato Grosso, Brazil.

Holotype. ‘ Brasil: Mato Grosso. Tangará / da Serra. Campus UNEMAT. 14°/38 ʹ 58’S, 57° 25 ʹ 24”W, 439 m. / Campo experimental, light/ trap. 14.xi.2017 R.J. Silva. ” ♂ ( CEMT 74758 ).

Paratypes. 4 specimens examined.

BRAZIL: Acre, Rio Branco , [9°58 ʹ 31”S, 67°49 ʹ 29”W], 1 .x .1988, Faria leg. (1 CEMT). Goiás, Niquelândia, Codemin , [14°18 ʹ 21”S, 48°23 ʹ 44”W], 8 .xii .1991, leg. (1 CEMT). Mato Grosso, Cuiabá, Flor do Cerrado , 15°29 ʹ 38”S, 56°4 ʹ 36”W, 8–12 .x .2016, FIT, A . Frolov leg . (1 CEMT). Rondônia, Vilhena , [12°44 ʹ 29”S, 60°7 ʹ 49”W], 25 .iv .2006, light trap, J .A . Rafael & F .F. Xavier leg. (1 CEMT).

Description

Body size: Length: 4.98–6.71 mm. Width: 3.56–5.45 mm. Head: Clypeal carina with three tubercles, being poorly defined and on an equal level. Frons presents interocular tubercles that are wider than long adjacent to each eye; concave region between the tubercles and with sparse punctuation, with points unevenly distributed. Pronotum: Anterior region of the disc with almost rectangular tubercle, wider than half the interocular space. The entire pronotum surface with sparse points, greater concentration on the sides of the disc and unevenly distributed. Male terminalia: In dorsal view, apparently short and twisted parameres ( Figure 11 (g)). In lateral view, parameres not visible and posterior margin beyond the apex of the parameres and rounded ( Figure 11 (i)). Sexual dimorphism: This species does not feature sexual dimorphism. Remarks: The primary type is deposited at the CEMT.

Differential diagnosis. Bolbapium sampaioorum sp. nov. is morphologically similar to B. borgmeieri , B. boillyi sp. nov., B. caesum , B. howdeni , B. modestum , B. parcepunctatum and B. santanaorum sp. nov. in not presenting the transverse carina forehead interconnecting the interocular tubercles. However, it is easily differentiated by presenting on the pronotum almost rectangular structure occupying more than half of the interocular space.

Geographical distribution. Brazil (Acre, Goias, Mato Grosso and Rondonia) .

Figures

Figure 6. (a). Pronotum with almost rectangular structure, Bolbapium modestum (Castelnau, 1840); (b). head with tubercle adjacent to each eye, Bolbapium borgmeieri Martínez, 1976; (c). head without tubercles, Bolbapium matheusi Carvalho and Vaz-de-Mello, sp. nov.; (d). pronotum with curved structure towards the head, without angulations, Bolbapium howdeni Martínez, 1976; (e). head with tubercles wider than long; pronotum with rectangular structure, Bolbapium sampaioorum Carvalho and Vaz-de-Mello, sp. nov.; (f). head with tubercle narrow adjacent to each eye; pronotum with curved structure, Bolbapium caesum (Klug, 1843).

Figure 11. Aedeagus. Bolbapium matheusi Carvalho and Vaz-de-Mello, sp. nov. (a). dorsal view; (b). ventral view; (c). lateral view. Bolbapium howdeni Martínez, 1976 (d). dorsal view; (e). ventral view; (f). lateral view. Bolbapium sampaioorum Carvalho and Vaz-de-Mello, sp. nov. (g). dorsal view; (h). ventral view; (i). lateral view. Bolbapium caesum (Klug, 1843) (j). dorsal view; (k). ventral view; (l). lateral view.