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Comparisons

Nevadasilus and Regasilus or "Stilpnogaster auriannulatus"

I have one specimen from Canada, which I have identified as Stilpnogaster auriannulatus Hine, 1906, but the determination is somewhat questionable. If the naming is correct, this species is neither a Stilpnogaster nor Nevadasilus, because it quit different in some remarkable characters (especially in the color and chaetotaxy of legs, especially the front femora, face and gibbosity, postpedicel, marginal bristles of scutellum, wing venation, and last tergites). Therefore I have no idea for the correct placemant into one of the Nearctic Apocleinae genera.

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Nevadasilus Artigas & Papavero, 1995
label
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cf. Regasilus or "Stilpnogaster auriannulatus"
label
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Nevadasilus Artigas & Papavero, 1995
dorsal view
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cf. Regasilus or "Stilpnogaster auriannulatus"
dorsal view: tergites 6+7 shining black
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Nevadasilus Artigas & Papavero, 1995
lateral view
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cf. Regasilus or "Stilpnogaster auriannulatus"
lateral view
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Nevadasilus Artigas & Papavero, 1995
head dorsal view
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cf. Regasilus or "Stilpnogaster auriannulatus"
head dorsal view
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Nevadasilus Artigas & Papavero, 1995
head lateral view: gibbosity climb up higher
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cf. Regasilus or "Stilpnogaster auriannulatus"
head lateral view: gibbosity weaker
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Nevadasilus Artigas & Papavero, 1995
head frontal view
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cf. Regasilus or "Stilpnogaster auriannulatus"
head frontal view: face with adpressed
golden hairs below antennae
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Nevadasilus Artigas & Papavero, 1995
head sideways view
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cf. Regasilus or "Stilpnogaster auriannulatus"
head sideways view
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Nevadasilus Artigas & Papavero, 1995
postpedicel: narrow
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cf. Regasilus or "Stilpnogaster auriannulatus"
postpedicel: thickset
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Nevadasilus Artigas & Papavero, 1995
scutum lateral view
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cf. Regasilus or "Stilpnogaster auriannulatus"
scutum lateral view
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Nevadasilus Artigas & Papavero, 1995
scutellum dorsal view: with numerous
marginal bristles
both species with rim
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cf. Regasilus or "Stilpnogaster auriannulatus"
scutellum dorsal view: with 4 marginal
bristles
both species with rim
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Nevadasilus Artigas & Papavero, 1995
scutellum back view
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cf. Regasilus or "Stilpnogaster auriannulatus"
scutellum back view
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Nevadasilus Artigas & Papavero, 1995
wing: R4 curves forward, meeting the
costa above the apex of wing
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cf. Regasilus or "Stilpnogaster auriannulatus"
wing: R4 curves backwards at the tip
and meets the costa below the apex of wing
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Nevadasilus Artigas & Papavero, 1995
front femur: ventrally with hairs only
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cf. Regasilus or "Stilpnogaster auriannulatus"
front femur: with ventral bristles
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Nevadasilus Artigas & Papavero, 1995
abdomen dorsal view
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cf. Regasilus or "Stilpnogaster auriannulatus"
abdomen dorsal view
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Nevadasilus Artigas & Papavero, 1995
hypopygium dorsal view
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cf. Regasilus or "Stilpnogaster auriannulatus"
hypopygium dorsal view
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Nevadasilus Artigas & Papavero, 1995
hypopygium lateral view
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cf. Regasilus or "Stilpnogaster auriannulatus"
hypopygium lateral view

 

 

 

Contents: © Fritz Geller-Grimm, Jorge N. Artigas, 2007
Layout & images: © Fritz Geller-Grimm, 2007