Bolbapium sergioidae Carvalho

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 : 820-821

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

( Figures 3 (c), 7(d), (e), (f), 16(b))

Diagnosis

Lower parts of clypeo-frontal carina much higher than anterior clypeal carina; mesoanterior pronotal structure bituberculated, well emarginated, tubercle on each side of the central structure ( Figure 3 (c)).

Etymology. Named for Dr Sergio Ide, Brazilian scarabaeoidologist, who reviewed the genus Bolbapium in his MSc thesis back in 1992.

Type locality. Recanto das Siriemas, Cuiabá, Mato Grosso, Brazil.

Holotype. ‘ Brasil: Mato Grosso,/ Cuiabá, Recanto das/ Siriemas , 15°35 ʹ 33’S, 56°/1 ʹ 37”W, x.2015 /LGOA Nunes.” ♂ ( CEMT 74746 ).

Paratypes. 7 specimens examined.

ARGENTINA: Corrientes, Rta 14, 45 km N Paso de Los Libres, 29°31 ʹ 21”S, 57°7 ʹ 58”W, 24 . xi .2006, Berger-Dostal leg . (1 CEMT); Santiago del Estero, Rio Hondo , [27°35 ʹ 34”S, 64°54 ʹ 46”W], 25 .xi .1953, coll . Martínez, A . Ogloblin leg. (1 COPL). BOLIVIA: Santa Cruz, [17°48 ʹ 52”S, 63° 9 ʹ 21”W], 30 .x .1955, Zischka leg. (1 CEMT). BRAZIL: Mato Grosso, Várzea Grande, EMPAER, 08 . xi .2021 G . Pessoa leg . (2 CEMT). PARAGUAY: Assunção, [25°15 ʹ 49”S, 57°34 ʹ 33”W], 14 .iv .1948, coll . Martínez , Podtinguin leg . (1 COPL); Cordillera, Pirareta , 25°29 ʹ S, 56°56 ʹ W, 03 .xi .2012, U . Drechsel leg . (1 COPL).

Description

Body size: Length: 5.70–6.01 mm. Width: 4.41–4.69 mm. Head: Lower parts of clypeofrontal carina much higher than anterior clypeal carina. Frons presents an arc-shaped carina that connects with clypeo-frontal carina; region between the carina and the clypeus with a weak and not very evident score. Antenna with the last three antennomeres with globular shape compared with the other species ( Figure 2 (c)). Pronotum: Bituberculated structure, well emarginated, and a tubercle on each side of the central structure. Ventral region of the thorax: Central region of the metaventrite with a few unevenly distributed setae. Elytron: There are setae in the apical region of the external dorsal margin of the elytron (quantity varies among individuals). Male terminalia: In dorsal view, parameres are found together, separating slightly at the apex ( Figure 7 (d)); in lateral view, curved parameres forming an angle of almost 45°; posterior margin with slightly curved projection and rounded apex ( Figure 7 (f)). Sexual dimorphism: This species does not feature sexual dimorphism. Remarks: The primary type is deposited at the CEMT.

Differential diagnosis. Bolbapium sergioidei sp. nov. is morphologically similar to B. dutraorum sp. nov. and B. striatopunctatum in presenting the forehead with a transverse carina without tubercle formation on each side. However, it is easily distinguished by the difference in structures in the anterior region of the pronotum: B. sergioidei sp. nov. has a strongly bituberculated structure, in addition to the upward-projected clypeus.

Geographical distribution. Brazil (Mato Grosso); Bolivia (Santa Cruz); Argentina (Corrientes and Santiago del Estero), Paraguay (Asunción and Cordillera) .

Figures

Figure 2. Bolbapium (a). Hind wings. Apex of the third branch of the radial vein directed towards the outer edge of the wing (black setae 1); between the cubital and the first anal vein articulated with the base of the wing there are two free veins (black circle); jugular wing area is not reduced (black setae 2). (b). Antenna with the last three antennomeres elongated. (c). Antenna with the last three antennomeres globose.

Figure 3. (a). Head with tranverse carina,Bolbapium striatopunctatum (Castelnau, 1840); (b). head with tranverse carina, Bolbapium dutraorum Carvalho and Vaz-de-Mello, sp. nov.; (c). clypeal-frontal carina high, pronotum with bituberculated structure, Bolbapium sergioidae Carvalho and Vaz-de-Mello, sp. nov.; (d). head with tubercles adjacent to each eye; pronotum with concave structure, Bolbapium luederwaldti Carvalho and Vaz-de-Mello, sp. nov.; (e). clypeal-frontal carina with very high and prominent central tubercle ♂, Bolbapium minutum (Luederwaldt, 1931); (f). pronotum mesoanteriorly with pair of longitudinal structure, Bolbapium baeri (Boucomont, 1902).

Figure 7. Aedeagus. Bolbapium striatopunctatum (Castelnau, 1840) (a). dorsal view; (b). ventral view; (c). lateral view. Bolbapium sergioidae Carvalho and Vaz-de-Mello, sp. nov. (d). dorsal view; (e). ventral view; (f). lateral view. Bolbapium luederwaldti Carvalho and Vaz-de-Mello, sp. nov.; (g). dorsal view; (h). ventral view; (i). lateral view. Bolbapium minutum (Luederwaldt, 1931) (j). dorsal view; (k). ventral view; (l). lateral view.