Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021

González-Alvarado, Arturo & Vaz-De-Mello, Fernando Z., 2021, Taxonomic revision of the Deltohyboma Lane, 1946 gilli species group (Coleoptera: Scarabaeidae: Scarabaeinae: Deltochilum), European Journal of Taxonomy 775, pp. 86-106 : 93-95

Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021

Figs 1A , 2A , 3A , 4A , 5A , 6A , 7A , 8A , 9A–B , 10

Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021: 50 , figs 26c, 28.

Diagnosis

Elytra with apical tubercles on interstriae III–VII ( Fig. 5A ), first stria almost twice as wide as than second stria, striae III–VII subequal in width and conspicuous ( Figs 1A , 4A ) and sub-medial area of endophallus with elongate scales ( Fig. 8A , arrow) distinguish this species (for a complete description see González-Alvarado & Vaz-de-Mello 2021).

Material examined

Holotype GUYANA • 1 ♂; District 8 , Mount Wokomung; 5º06′34.8″ N, 59º49′15.3″ W; alt. 1234 m; 27 Oct.–1 Nov. 2004; B. Hubley leg.; pitfall trap (human dung), primary forest; ROM 2004516; BDGC. [aedeagus and endophallus extracted]; CNC 379888 .

Paratype GUYANA • 1 ♀; same collection data as for preceding; BDGC .

Remarks

Within D. ( Deltohyboma ) only few species which possess the anterior margin of clypeus expanded posteriorly into a triangular shape have more than four elytral apical tubercles. Frequently, in species bearing over four apical tubercles, the anterior margin of the clypeus is not expanded into a triangular shape. D. gilli is one of those few exceptions.

Known distribution

Guyana. District 8, Mount Wokomung. ( Fig. 10 , blue circle).

Figures

Fig. 1. Habitus of members of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 2. Head of members of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 3. Pronotum of members of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744 E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745. F. Miscrosculpture of pronotal disc, Holotype of D. jocelynae sp. nov. G. Miscrosculpture pronotal disc, Holotype of D. nonstriatum sp. nov. White arrows show the shiny points.

Fig. 4. Elytra of members of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 5. Caudal view of mmbers of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 6. Ventral view of members of the gilli species group. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 7.Aedeagus of members of thegilli species group.A–E. Lateral view.F–G. Dorsal view of paramera. Arrows show the apical-dorsal notches of the paramera. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov. CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype of D. tenuistriatum sp. nov., CMNEN WSD00041745. F. Holotype of D. jocelynae sp. nov. G. Holotype of D. nonstriatum sp. nov., CMNEN WDS00041746.

Fig. 8. Endophallus of members of thegilli species group.Arrows show the scales on the sub-medial area of the endophallus. A. Elongate scales. C. Regular scales. A. Holotype of Deltochilum gilli González- Alvarado & Vaz-de-Mello, 2021, CNCI 379888. B. Holotype of D. jocelynae sp. nov., CNCI 379889. C. Holotype of D. nonstriatum sp. nov., CMNEN WSD00041746. D. Holotype of D. quasistriatum sp. nov., CMNEN WSD00041744. E. Holotype D. tenuistriatum sp. nov., CMNEN WSD00041745.

Fig. 9. Habitus A, C and ventral view B, D of the only two females known of the gilli species group. A–B. Paratype of Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021. C–D. Paratype D. jocelynae sp. nov.

Fig. 10. Distribution map of thegilli species group. Blue circle =Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021; yellow square = D. jocelynae sp. nov.; red star = D. nonstriatum sp. nov.; green triangle = D. quasistriatum sp. nov.; white eight-point star = D. tenuistriatum sp. nov.