Oreiscelio megadontus Talamas, 2009

Talamas, Elijah, Johnson, Norman, van Noort, Simon, Masner, Lubomir & Polaszek, Andrew, 2009, Revision of world species of the genus Oreiscelio Kieffer (Hymenoptera, Platygastroidea, Platygastridae), ZooKeys 6 (6), pp. 1-68 : 37-39

publication ID

http://doi.org/ 10.3897/zookeys.6.67

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scientific name

Oreiscelio megadontus Talamas

sp. n.

Oreiscelio megadontus Talamas   , sp. n.



Figures 79-84 View Figures 79-84.99 ; Morphbank 39

Description. General: Body length of female: 4.1-4.1 mm (n=4.1). Body color: black.

Antenna: Color of antennae in female: A1–A6 yellow; A7–A12 dark brown to black. Seta on pedicel of antenna in female: present, reaching past apex of A3.

Head: Color of setae on the head: yellow. Sculpture of dorsal frons between frontal carina and median ocellus: coarsely foveate. Preocellar pit in females: present as a distinct pit. Transverse rugae at vertex: present. Sculpture of posterior vertex: coarsely foveate. Sculpture of occipital rim: areolate. Interantennal process: simple. Number of anteriorly projecting setae on anteclypeus: 8. Color of mandibles in female: yellow throughout with teeth brown. Mandibular teeth in female: ventral tooth at least twice as long and wide at base than dorsal tooth. Sculpture of ventral gena anterior to genal carina: row of shallow areolae with reduced ridges between cells. Sculpture of ventral

gena posterior to genal carina: mostly smooth, with sparse small punctures. Shape of anteclypeus: striplike, straight to slightly convex.

Legs: Color of legs: coxae brown, legs otherwise yellow.

Mesosoma: Sculpture of dorsal pronotum: areolate. Color of setae on the dorsal mesosoma: yellow. Sculpture of medial mesoscutum: areolate, with pronounced longitudinal ridges. Sculpture of lateral mesoscutum: with small patch of smoother sculpture, formed by fusion of sculptural ridges, smooth patch not extending to scutoscutellar sulcus. Notaulus in female: absent. Parapsidal line: delimited. Sculpture of scutellum: areolate. Median furrow on scutellum: absent. Posterior margin of scutellum: emarginate. Outer projection of the propodeum: present as distinct corner or posteriorly projecting spine. Posterior margin of propodeal shelf between inner and outer propodeal projections in female: concave. Sculpture of ventral pronotum: foveate reticulate, becoming smooth at anterolateral corner. Anterior pronotal pit: small. Pronotal cervical sulcus: well defined by contiguous punctures. Mesepimeral sulcus: indicated by dorsoventral line of foveae. Sculpture of femoral depression in female: smooth throughout. Mesopleural carina: indicated by one or two rows of punctures. Sculpture of ventral mesepisternum: with smooth area surrounded by small foveae. Pilosity of metapleural triangle in female: present as many short fine white setae. Sculpture of ventral area of metapleuron: smooth.

Metasoma: Submarginal ridge on T1: partially fused with marginal carina. Sublateral carina on T2: percurrent. Sculpture of T2–T3: reticulate rugose. Sculpture of T4: longitudinally strigose. Sculpure of T5: longitudinally strigose. Shape of subapical T 6 in female in dorsal view: short, width along anterior margin at least three times the length. Longitudinal medial keel on S1: absent. Sculpture of medial S 2 in female: punctate reticulate. Sculpture of medial S 3 in female: effaced to smooth. Sculpture of medial S 4 in female: effaced to smooth. Sculpture of medial S 5 in female: reticulate rugose. Sculpture of lateral S 3 in female: foveolate. Sculpture of lateral S 4 in female: foveolate. Sculpture of lateral S 5 in female: reticulate rugose. Sculpture of marginal depression of S 2 in female: smooth. Sculpture of marginal depression of S 3 in female: smooth. Sculpture of marginal depression of S 4 in female: rugulose. Sculpture of marginal depression of S 5 in female: rugulose. Apical spine on S 6 in female: extending beyond apex of T6 and visible in dorsal view.

Diagnosis. Oreiscelio megadontus   is the largest known species of Oreiscelio   . Oreiscelio scapularis   is comparable in length but is more slender. It is a relatively dissimilar species and may be identified by the combination of the much larger mandibular tooth ( Fig. 83 View Figures 79-84.99 ), the emarginate posterior margin of the propodeal shelf between inner and outer propodeal projections ( Fig. 84 View Figures 79-84.99 ), and the bright yellow legs ( Fig. 79 View Figures 79-84.99 ).

Etymology. The epithet megadontus   refers to the large size of the ventral mandibular tooth in this species.

Link to distribution map. 40

Material examined. Holotype female: TANZANIA: Tanga, Armani Hills , 23.VI– 24.VII.2001, D. Quicke, OSUC 212512 (deposited in CNCI) 41.  


Canadian National Collection Insects