Chilicola (Oroediscelis) pustulata Packer & Dumesh 2019, new species
Creators: name: Packer, Laurence
name: Dumesh, Sheila
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Colletidae
Chilicola

description: Chilicola (Oroediscelis) pustulata Packer and Dumesh, new species
urn:lsid:zoobank.org:act: C130A045-60B0-42B1-B638-A5E6F96AA6EF
(Figs. 48–53, 81, 105, 108–111)
Diagnosis. This is the only species of C. (Oroediscelis) with a toothed metatrochanter in the male (Fig. 53). The following combination is also diagnostic for males: inner crest and adjacent medial crest of metatibia marked with yellow, metabasitarsus not marked with yellow and profemur unmodified. The only other species with a yellow marked metatibia are C. bigibbosa Michener, in which the profemur is strongly swollen basoventrally, and C. maculipes Michener, which has yellow on the metabasitarsus. The inner crest of the metatibia is enormously developed into an almost rectangular flange and it is the basoventral corner of this which bears the yellow coloration.
Description. Male: Length 6.0– 6.3mm; forewing length 4.5 mm, head width 1.4–1.45 mm.
Head: about 1.1 X as long as wide, 79:70. Clypeus with transverse apical yellow band, paraocular area yellow to just below level of dorsal margin of clypeus; mandible without yellow maculation. Clypeal punctures large, i=1– 3 d; supraclypeal area punctures small, i=1–4 d; lower paraocular area sparsely punctate, i=1–4 d; frontal area alveolate-punctate. Malar space approximately half as long as wide (6:11); lower ocular tangent at around upper 0.4 X length of clypeus. Longest hairs on face between antennae, 2.5–3 MOD; genal beard with hairs up to 3.2 MOD. F1 as long as F2 on anterior surface (11:11) but longer on posterior surface (12:10); F2 with subapical seta subequal in length to F3, F3 with seta <0.5 length of F4.
Mesosoma: pronotum with dense punctures, i<d and transverse wrinkling; mesoscutum and mesoscutellum somewhat shiny, imbrications shallow, punctures distinct, i=1–3 d and i=1–4 d respectively, punctures somewhat larger on mesoscutellum; metanotum distinctly punctate, i=1–3 d; mesepisternum punctate, i=1–2 d, sparser above scrobe. Metepisternum rugoso-striate, strongly above, weakly below; metapostnotum as long as mesoscutellum (16:16), with frequently incomplete unbranched longitudinal striae; lateral surface of propodeum shallowly punctate, punctures hard to detect amongst strong imbrication. Longest hairs of thorax on mesepisternum, ~3 MOD, most hairs of mesoscutum ~1.5 MOD. Stigma much shorter than marginal cell on wing margin (28:45); marginal cell gradually set off from leading edge of forewing; distal stigmal perpendicular slightly apical to first submarginal crossvein. Profemur slender. Mesofemur strongly concave basoventrally. Metatrochanter with apicoventral slightly acute tooth. Metafemur with posteroventral margin rounded, with weak convexity at apical 1/ 5 th. Metatibia more than twice as long as greatest depth (44:21) which is on the inner flange, apical brush absent; inner crest with deep concavity just basad of flange, flange forming a large blister-like, shiny surface that is longer than wide, 21:13; transverse crest short, evenly rounded in outer view; metabasitarsus almost as long as remaining tarsomeres combined (42:47), ventral process bilobed, strongest lobe at midlength bearing thick bristles on inner surface, lobes somewhat produced anteriorly, apex of apical lobe almost right angular in transverse view.
Metasoma: somewhat shiny except submarginal areas very shiny, T1–T3 shallowly punctate, i=1–3 d, sparser elsewhere, apex of apical impressed area impunctate for ~0.5 MOD, punctures increasingly sparse on succeeding apical impressed areas; apicolateral patches of white, plumose hairs on T1–T3. S1 with long, posteriorly oriented, plumose hairs anteriorly, 2 MOD, shorter erect hairs laterally, longest 1.5 MOD; S2 erect plumose hairs lateral and posterior to process, longest posteriorly, 1.5 MOD; S3 with few long hairs posterolaterally, <1.5 MOD; S4 with hairs 1.5–2 MOD, S5 erect hairs sinuate, 3 MOD; S6 apical tuft ~2.5 MOD. S1 unmodified; S2 transversely evenly concave between longitudinally oriented ridge-like processes, length of truncate apex of process, ~1.5 MOD; S3 with weak lateral boss; S4 with process short, or merely a strongly pronounced lateral boss, ~1 MOD; S5 unmodified, without process; S6 without apicolateral fovea, apical impressed area distinct, elongate ~1.1 MOD, subapical setal row long, ~4 MOD, at ~40° to impressed area.
Terminalia: refer to Figs. 47–49.
Female: unknown.
Material studied. Holotype male and three male paratypes: PERU, Cusco Departamento, Cuzco, 24.xi.1965, H. & M. Townes [AEI] [See Figs. 184–185 for distribution map].
Etymology. This specific epithet refers to the blister-like inner flange to the metatibia.
Comments. This is the only species in the subgenus with a tooth to the metatrochanter. Similar structures have arisen, apparently independently, on numerous occasions within the Xeromelissinae (Packer, 2008; unpublished observations).
description: Published as part of 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, pp. 1-56 in Zootaxa 4559 (1) on pages 19-21, DOI: 10.11646/zootaxa.4559.1.1, http://zenodo.org/record/2585011