Orasema Cameron 1884
Creators: name: Heraty, John M.
name: Baker, Austin J.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eucharitidae
Orasema

description: Orasema lasallei species group
Diagnosis
Recognised from all other species of Orasema by having a combination of 8 funiculars in males and females (Figure 2), the labrum with 4 – 12 digits (usually>6), mesothorax dorsally scabrous or coarse rugose, fore wing with a setose costal cell, speculum bare, and basal third of hind wing with scattered microsetae, otherwise pilose. Other features include the yellow scape, yellowish-brown mandibles with a darker brown margin, propodeal callus with 2 – 3 minute setae, wings hyaline, postmarginal vein not more than 2.3× as long as stigmal vein, fore wing with basal area bare, petiole cylindrical and rugose, lateral margins of petiole rounded (not carinate), 2.1 – 3.8× as long as broad in females, 8.3 – 10× as long as broad in males, and smooth antecostal sulcus.
Key
In the Burks et al. (2018) species group key, this species group keys to ‘ [undescribed set of Neotropical species] ’ in the Orasema festiva couplet with more than 6 digits, although we now recognise that some specimens have as few as 4 digits. All festiva group species have a lateral carina on the petiole, which is absent in the lasallei group.
Diversity
We recognise four species in the group, Orasema janzeni (Costa Rica and Nicaragua), O. lasallei (Costa Rica, Honduras, Mexico, Nicaragua), O. peckorum (Brazil), and O. vasquezi (Colombia).
Biology. Orasema lasallei was taken from a nest of Pheidole vorax (Fabr.) (Myrmicinae).
Key to species of the O. lasallei species group
1. Frons vertically costate, lower face mostly smooth (Figure 3a, 4e); labrum with 6 – 12 digits (Figure 3a,b) ................................................................................................................................... 2
Frons rugulose or reticulate, lower face with some sculpture (Figure 3f); labrum with 4 – 8 digits (Figure 3 f).............................................................................................................................. 3
2. Hind femur yellow (Figure 3c, d)............................ ............................ Orasema lasallei sp. nov.
Hind femur dark brown medially (Figure 4d) ............................ Orasema vasquezi sp. nov.
3. Labrum with 8 (♀) or 6 (♂) digits; frons rugulose-reticulate; basal area of speculum bare; postmarginal vein 2.2× as long as stigmal vein .................... Orasema peckorum sp. nov.
Labrum with 4 – 6 digits; frons finely reticulate; basal area of speculum closed by broad band of setae; postmarginal vein 1.4 – 2.2× as long as stigmal vein.......................................... .......................................................................................................................... Orasema janzeni sp. nov.
description: Published as part of Heraty, John M. & Baker, Austin J., 2020, New species of Orasema (Hymenoptera: Eucharitidae) from Central and South America, pp. 735-754 in Journal of Natural History 54 (9) on page 737, DOI: 10.1080/00222933.2020.1747651, http://zenodo.org/record/4290525