Cornugon diceros, Hansson, Christer, 2011
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publication ID |
https://doi.org/ 10.5281/zenodo.277538 |
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DOI |
https://doi.org/10.5281/zenodo.5690176 |
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persistent identifier |
https://treatment.plazi.org/id/03F1FB3F-FFF7-FFF5-FF60-1C6BE829FF03 |
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treatment provided by |
Plazi |
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scientific name |
Cornugon diceros |
| status |
sp. nov. |
Cornugon diceros sp. nov.
( Figs 23–27 View FIGURES 23 – 27 , 53 View FIGURES 52 – 57 , 76–79, 80, 81 View FIGURES 74 – 88 )
Diagnosis. Upper part of frons with two "horns" and with frontal suture continuing up into apex of horns ( Figs 23– 25 View FIGURES 23 – 27 ); scape, femora and tibiae white; scutellum with a deep and distinct median groove in anterior 2/3 ( Fig. 26 View FIGURES 23 – 27 ); hind coxa conspicuously hairy on posterior surface; propodeum without median carina ( Fig. 27 View FIGURES 23 – 27 ); petiole 2X as long as wide, narrow anteriorly and becoming wider posteriorly, and reticulate with isodiametric meshes ( Fig. 27 View FIGURES 23 – 27 ); first gastral tergite 0.4X as long as gaster.
Similar to C. diabolos , but differing in shape of petiole; also similar to C. bicornis , but differing in having scape, femora and tibiae white and a large fovea medially between mesoscutum and scutellum ( Fig. 26 View FIGURES 23 – 27 ).
Description. FEMALE. Length 0.9–1.2 mm. Antenna dark brown except scape white. Frons weakly metallic purple, golden-green along eyes. Vertex, mesoscutum, scutellum, propodeum and gaster metallic bluish-purple or bluish-green. Coxae dark and metallic; femora, tibiae and tarsi white. Wings hyaline.
Antenna as in Fig. 80 View FIGURES 74 – 88 . Frons smooth and shiny, upper part of frons with two "horns" ( Figs 23–25 View FIGURES 23 – 27 ); tentorial pits distinct ( Fig. 24 View FIGURES 23 – 27 ); frontal suture incomplete, ending just below frontal horns. Vertex smooth and shiny ( Fig. 25 View FIGURES 23 – 27 ); medially with a groove between occipital margin and anterior ocellus.
Mesonotum medially with a more or less round fovea between mesoscutum and scutellum ( Fig. 26 View FIGURES 23 – 27 ). Mesoscutum smooth and shiny ( Fig. 26 View FIGURES 23 – 27 ). Scutellum with engraved, weak reticulation of elongate meshes and with a distinct median groove in anterior 2/3 ( Fig. 26 View FIGURES 23 – 27 ), and, posterior 1/3 with raised, strong, isodiametric meshlike reticulation. Dorsellum hidden under scutellum, not visible in dorsal view ( Fig. 26 View FIGURES 23 – 27 ). Propodeum smooth and shiny between plicae ( Fig.27 View FIGURES 23 – 27 ).
Petiole 2X as long as wide, reticulate with small isodiametric meshes ( Fig. 27 View FIGURES 23 – 27 ). Gaster ovate with first tergite covering 0.4X length.
MALE. Length 1.1 mm. Frons metallic dark purple. Vertex golden or metallic red. Mesoscutum golden or metallic purple. Scutellum with anterior 2/3 golden and posterior 1/3 metallic dark purple, or completely metallic red. Propodeum golden-green or metallic purple. Fore femur completely white or with basal 2/3 pale brown with apical 1/3 white, remaining parts of legs distal to coxae white. Petiole black with metallic purple and blue tinges.
Gaster dark brown with metallic purple tinges and with a white spot in anteromedian ½ or 1/5. Antenna as in Fig. 81 View FIGURES 74 – 88 . Structure otherwise as in female.
Type material. Holotype female ( INBio) labelled “ Costa Rica, Guanacaste, Bosque Nacional Diriá, Retallano, alrededor Torre Control de Incendio, 600–700 m, 14.viii–18.ix.2001, LN 238550/358650, I. Jiménez, #64578” ( INBio). Paratypes. 4Ƥ 23 on cards. COSTA RICA. Guanacaste: Parque Nacional Palo Verde, Sector Palo Verde, 250 m, 10–18.viii.2000, LN 385020/ 260952, I. Jiménez, #57716 (13, INBio); Heredia: 16 km SSE La Virgen, 450–550 m, 14.ii–22.iii.2003 (1Ƥ, INBio); Puntarenas: Reserva Privada Karen Mogensen, 09˚52'N 85˚03'W, 300 m, 11–21.ii.2005, C. Hansson (1Ƥ, CH); from same locality as previous but collected 24.ii.2007 (1Ƥ, BMNH). MEXICO. Guerrero: 6.2 miles southwest of Xochipala, 6.vii.1987, 87/017, J.B. Woolley (1Ƥ 13, TAMU).
Etymology. Named after the two “horns” on upper part of frons, from the Greek dikeros = “two-horned”.
Distribution. Costa Rica, Mexico.
Remarks. There are colour differences between the male from Costa Rica (mentioned first in the description) and the male from Mexico. This might indicate two different species, or intraspecific variation. The two specimens are otherwise very similar and until more material becomes available I regard the colour differences as variation within the species.
| INBio |
National Biodiversity Institute, Costa Rica |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.