Chilicola (Oroediscelis) huarpe Packer and Dumesh, 2019

Packer, Laurence & Dumesh, Sheila, 2019, Fifteen new species of Chilicola (Oroediscelis) (Hymenoptera: Colletidae: Xeromelissinae) with illustrated keys to the males and females of the subgenus, Zootaxa 4559 (1), pp. 1-56 : 28-29

Chilicola (Oroediscelis) huarpe Packer and Dumesh , new species

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( Figs. 72–73 , 144 , 156–157 , 159 )

Diagnosis. The female of this species can be differentiated by the combination of short striae on the metapostnotum and abundant minute punctures among the larger ones on T1. It is most similar to C. jaguense but differs as noted in the diagnosis for that species.

Description. Female. Length 7.0 mm; forewing length 4.6 mm, head width 1.6 mm.

Head: 1.2 X as long as wide, 98:81; black, small orange mark below anterior tentorial pit, and on apical 1/3 of malar space. Face below antennae shining, weakly imbricate, most strongly on lower 1/4 of supraclypeal area and upper 1/3 of clypeus; face below antennae deeply punctate, i=1–4 d; frontal area densely and evenly punctate, i<d; facial fovea shiny, punctures smaller than on adjacent frontal area. Malar space approximately half as long as wide (10:21). Longest hairs on face above antennal sockets, 1.3 MOD, longer on vertex <2 MOD; genal beard <3 MOD.

Mesosoma: Pronotum but not anteromedial portion of mesoscutum doubly punctate, small punctures dense, i~d, larger punctures scattered; rest of mesoscutum somewhat dull, punctures distinct, i=1–1.5 d, smaller anteromedially, i~d; mesoscutellum shiny, punctures distinct, i=0.5–1d with few scattered minute punctures; metanotum somewhat shiny, anterior punctures small and dense, i<d, posteriorly punctures larger and sparser, i=0.5–2 d; mesepisternum with numerous minute punctures among larger ones, i=1–3 d; metepisternum longitudinally rugoso-striate above, coarsely imbricate below, with dense punctures. Mesoscutum lacking long hairs, hairs <0.5 MOD; mesepisternum with longest hairs ventrally ~2 MOD. Stigma shorter than marginal cell on costal margin, 32:45; apex of marginal cell abruptly curving from anterior wing margin, almost truncate; distal stigma perpendicular just apical to first submarginal crossvein. Metapostnotum with most striae short, ~1/2 length of metapostnotum except for median stria and few lateral ones; lateral surface of propodeum imbricate, punctures shallow, large at midlength dorsally, smaller elsewhere.

Metasoma: terga shiny, shallowly imbricate; T1 doubly punctate, minute punctures more abundant than large ones on disc, large punctures evenly spaced, i~d, microsculpture absent basal to apical impressed area; minute punctures decreasing in abundance on more successive terga, i=1–2 d.

Male: unknown.

Material studied. Holotype female: ARGENTINA, Mendoza, Uspelleta ,[Uspallata] i.1947, Hayward & Willink [ MACN] [See Figs. 184–185 for distribution map].

Etymology. The species is named after the Huarpe people, who used to inhabit northern Mendoza and southern San Juan.

Comments. This species is found further south than any other in the subgenus.

Figures

FIGURES 72–73. Chilicola huarPe. 72. female lateral habitus (holotype); 73. female face (holotype).

FIGURES 143–144. Face, anterior view to show: 143. presence (C. jaguense holotype) and 144. absence of yellow maculation (C. huarPe holotype).

FIGURES 155–156. T1–T4 to show punctation: 155. T2 with large punctures as well as moderate and small ones, T1 with sparse punctation (C. luna holotype); 156. T2 lacking large punctures but with moderate and small punctures both present, T1 with dense punctation (C. huarPe holotype).

FIGURES 157–158. Metapostnotum, dorsal view, to show relative lengths of striae. 157. not attaining posterior margin (C. huarPe holotype); 158. at least some striate attaining posterior margin (C. cuyense holotype).

FIGURES 159–160. T1 to show relative strength of microsculpture and punctures. 159. microsculpture weak, surface shiny, punctures distinct (C. huarPe holotype); 160. microsculpture strong, surface dull, punctures often indistinct (C. cuyense holotype).

FIGURES 184–185. Distribution maps of newly described Chilicola (Oroediscelis) species. 184. Large scale map of South America showing distribution of new species; 185. Small scale map of northern Argentina to show distribution within the country.