Deltochilum gilli, Gonzalez-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 : 103-104

publication ID	https://doi.org/ 10.5852/ejt.2021.775.1551
publication LSID	lsid:zoobank.org:pub:976D7020-5904-4951-97CE-B4FE58DA12A8
DOI	https://doi.org/10.5281/zenodo.5590321
persistent identifier	https://treatment.plazi.org/id/03F48795-DC4C-FFA1-A4E7-A106FABAFA9A
treatment provided by	Felipe
scientific name	Deltochilum gilli
status

Treatment

Identification key to species of the gilli View in CoL species group

1. Striae I–VII inconspicuous, including apically, only in some parts striae slightly visible and very narrow ( Fig. 4B–C View Fig )............................................................................................................................ 2

– Striae I–VII conspicuous ( Fig. 4A, D–E View Fig ) .......................................................................................... 3

2. Head punctures on frons separated by less than one diameter of a puncture ( Fig. 2B View Fig ). Pronotal disc punctures separated by less than one diameter ( Fig. 3B, F View Fig ). Pronotal disc with well-defined shiny points ( Fig. 3F View Fig , white arrows). Punctures of third interstria on disc occupying about 1/14 th the distance between striae II and III ( Fig. 4B View Fig ). Width of expansion of first ventrite of male, on third ventrite, subequal to distance between clypeal teeth ( Fig. 6B View Fig ). Guyana, District 8: Mount Wokomung ( Fig. 10 View Fig , yellow square) ..................................................................... Deltochilum jocelynae View in CoL sp. nov. – Head punctures on frons almost contiguous ( Fig. 2C View Fig ). Pronotal disc punctures separated by less than one diameter, almost contiguous ( Fig. 3C, G View Fig ). Pronotal disc with irregular shiny points ( Fig. 3G View Fig , white arrows). Punctures of third interstria on disc occupying about 1/10 th the distance between striae II and III ( Fig. 4C View Fig ). Width of expansion of first ventrite of male, on third ventrite, narrower than distance between clypeal teeth ( Fig. 6C View Fig ). Venezuela, Bolivar ( Fig. 10 View Fig , red star) ............................................................................................... Deltochilum nonstriatum View in CoL sp. nov.

3. Elytral apical tubercles on interstriae III–VII ( Fig. 5A View Fig ). First stria almost twice wider than second stria ( Fig. 4A View Fig ). Striae III–VII subequal in width and conspicuous ( Fig. 4A View Fig ). Pronotal disc with shiny points well-defined and separated from punctures ( Fig. 3A View Fig ). Male metatrochanter with expansion on distal third. Width of expansion of first ventrite of male, on third ventrite, wider than distance between clypeal teeth ( Fig. 6A View Fig ). Sub-medial area of endophallus with elongate scales ( Fig. 8A View Fig , arrow). Guyana, District 8: Mount Wokomung ( Fig. 10 View Fig , blue circle) .................................................. Deltochilum gilli González-Alvarado & Vaz-de-Mello, 2021 View in CoL

– Elytral apical tubercles on interstriae III, V–VII ( Fig. 5D–E View Fig ). First stria subequal to slightly wider than second stria ( Fig. 4D–E View Fig ). Striae III–VII successively thinner and more ill-defined ( Fig. 4D– E View Fig ). Pronotal disc with shiny points irregular and contiguous to punctures ( Fig. 3D–E View Fig ). Male metatrochanter not modified. Width of expansion of first ventrite of male, on third ventrite, subequal to distance between clypeal teeth ( Fig. 6D–E View Fig ). Sub-medial area of endophallus with scales, but not elongate ( Fig. 8D–E View Fig ) Guyana, Mazaruni-Potaro District. Venezuela Bolívar ( Fig. 10 View Fig , white eightpoint star and green triangle) ............................................................................................................. 4

4. First stria wider than second stria ( Fig. 4D View Fig ). Punctures of third interstria on disc occupying about 1/10 th the distance between striae II and III ( Fig. 4D View Fig ). Pygidium with discal punctures occupying approximately 1/29 th the width on middle of pygidium and basal punctures almost contiguous ( Fig. 5D View Fig ). Guyana, Mazaruni-Potaro District: Takutu Mountains ( Fig. 10 View Fig , green triangle)....................................................................................... Deltochilum quasistriatum View in CoL sp. nov.

– First stria subequal in width to second stria ( Fig. 4E View Fig ). Punctures of third interstria on disc occupying about 1/14 th the distance between II and III ( Fig. 4E View Fig ). Pygidium with discal punctures occupying approximately 1/38 th the width on middle of pygidium basal punctures separated by less than one diameter but not almost contiguous ( Fig. 5E View Fig ). Venezuela, Bolívar: 10 km E of San Francisco ( Fig. 10 View Fig , white eight-point star) ................................................................. Deltochilum tenuistriatum View in CoL sp. nov.