Pedinopa Townes, 1970

Taxonomic History / Nomenclature
Pedinopa Townes, 1970: 136. Type species: Pedinopa ochracea Townes, 1970. Monobasic and original designation.
The only known species occurs in Chile.
Diagnosis and Relationships
The presence of the costula, a lateromedian portion of the anterior transverse carina of the propodeum, is very unusual in the Euryproctini. Townes, 1970: 136 used the costula as one of the defining features of this distinctive taxon, but also expressed concern about whether Pedinopa truly belonged in Euryproctini because it had this feature. Otherwise, the presence of a distinct dorsal, subapical notch on the ovipositor, the absence of a glymma on the tubular T1, and the relatively long first flagellomere lacking tyloids seem sufficient for retention in Euryproctini.

In addition to the presence of a costula, the tubular T1 and ventral flange of the mandible also help separate Pedinopa from other euryproctine genera.

Clypeus (Fig. 3) narrow, surface shagreened and finely punctate; ventral margin blunt and evenly concave throughout; epistomal sulcus shallow, poorly indicated as a depression between clypeus and slightly bulging face; clypeus in profile weakly protruding. Inner eye margins parallel. Malar space (Fig. 3) slightly shorter than broad basal width of mandible; malar sulcus absent. Mandible (Fig. 4) short, very broad at base, strongly tapering from base to apex; ventral tooth equal in length or very slightly longer than dorsal tooth; ventral margin with flange-like carination basad apical teeth. Maxillary palp shorter than height of head; antenna (Figs 1, 2) slightly longer than body; first flagellomere very long. Ocelli small, diameter of lateral ocellus less than distance from lateral ocellus to eye. Hypostomal carina meeting occipital carina well above base of mandible; occipital carina complete dorsally. Epomia present (Fig. 5). Epicnemial carina (Fig. 6) not reaching anterior margin of mesopleuron. Notaulus present on anterior declivity as a very weak impression, barely discernible on anterior part of disk. Groove between propodeum and metapleuron absent to weakly indicated, not u-shaped as in pionines; pleural carina present, well-developed throughout; propodeal carinae relatively well-developed (Figs 7, 9): median longitudinal carinae more broadly separated at margins of petiolar area than at margins of areola and often weaker bordering areola, absent anterior to areola; lateral longitudinal carina complete and well-developed throughout; anterior transverse carina present medially and laterally (costula present and well-developed), but not extending between lateral longitudinal carina and spiracle; posterior transverse carina complete though weaker medially in some specimens. Legs (Figs 1, 2) with apical margin of mid tibia only weakly expanded into a tooth and thus similar to that of fore leg; apical comb on posterior side of hind tibia well-developed (Fig. 2); posterior hind tibial spur slender, less than 0.5 times length of hind basitarsus; tarsal claws not pectinate; fifth tarsomere of hing leg normal in size (Fig. 2), not unusually elongate (relative to fourth). Fore wing (Fig. 8) with large areolet; stigma broad, with Rs+2r arising near midpoint. Hind wing (Fig. 2) with first abscissa of CU1 longer than 1cu-a. T1 very long, slender, and parallel-sided throughout (Figs 9-11); ventral margin decurved in profile; dorsal carinae absent; basal depression at dorsal tendon attachment absent; dorsal-lateral carina complete between spiracle and apex of T1, though not strongly elevated (Fig. 9); glymma absent. S1 extending nearly full length of T1, appearing fused to T1 though suture visible. T2 thyridium distinct; laterotergites of T2 and T3 separated by creases from median tergite. Ovipositor and sheath (Fig. 12) a bit longer than most euryproctines; ovipositor with a broad, dorsal, subapical notch, the notch well back from the apex. The body is extensively shagreened (granular-mat) in the only known species.

The above description is considerably expanded from the verbal description by Townes (1970), and based on a specimen in the Texas A&M University collection as well as the images here taken from specimens borrowed from the American Entomological Institute.

1. Pedinopa ochracea habitu...
2. Pedinopa ochracea habi...
4.Pedinopa ochracea mandible
5. Pedinopa ochracea head la...
6. Pedinopa ochracea meso...
7. Pedinopa och...
8.Pedinopa ochracea wings
9. Pedinopa ochracea T1 lateral...
10. Pedinopa ochracea T1 oblique...
11. Pedino...
12. Pedinopa ochracea ovipo...
No referenced distribution records have been added to the database for this OTU.

There are no specimens currently determined for this OTU, or those specimens determined for this OTU are not yet mappable.

This page was assembled by Bob Wharton as part of a larger collaborative effort on the genera of Ctenopelmatinae. Page last updated April, 2015.

This work would not have been possible without the groundwork provided by Ian Gauld’s study of the Australian and Costa Rican faunas, and we are particularly grateful for his assistance in many aspects of this study. We thank David Wahl of the American Entomological Institute, Gavin Broad of The Natural History Museum, London, and Andy Bennett of the Canadian National Collection for extended loans of the material used for this study. We also thank David Wahl for useful feedback throughout our study and John Heraty for samples of Chilean Ctenopelmatinae. Matt Yoder provided considerable assistance with databasing issues, and our use of PURLs ( in this regard follows the example of their use in publications by Norm Johnson. Heather Cummins, Andrea Walker, Patricia Mullins, Caitlin Nessner, Karl Roeder, Danielle Restuccia, and Cheryl Hyde graciously assisted us with image processing, formatting, and literature retrieval. This study was supported by the National Science Foundation’s PEET program under Grant No. DEB 0328922 and associated REU supplement nos DEB 0616851, 0723663, 0923134, and 1026618.

This material is based upon work at Texas A&M University supported by the National Science Foundation under Grant Number DEB 0328922 with REU supplements DEB 0616851, 0723663, 0923134, and 1026618.. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.