Unicarinata Sheng, Li & Sun, 2022
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publication ID |
https://dx.doi.org/10.3897/jhr.92.84969 |
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publication LSID |
lsid:zoobank.org:pub:1AD18B71-B687-4500-B896-DCD27C57A4C7 |
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persistent identifier |
https://treatment.plazi.org/id/C13F7A99-67D9-4CFD-A451-73CD1CC21B70 |
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taxon LSID |
lsid:zoobank.org:act:C13F7A99-67D9-4CFD-A451-73CD1CC21B70 |
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treatment provided by |
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scientific name |
Unicarinata Sheng, Li & Sun |
| status |
gen. nov. |
Unicarinata Sheng, Li & Sun gen. nov.
Type species.
Unicarinata ventrialis Sheng, Li & Sun, sp. nov. Monotypic.
Diagnosis.
Mandible (Fig. 3 View Figure 3–11 ) large and long, lower tooth distinctly longer than upper tooth. Occipital carina complete, genal carina joining hypostomal carina above base of mandible. Dorsal end of epicnemial carina (Fig. 4 View Figure 3–11 ) almost reaching front edge of mesopleuron. Areolet absent (Fig. 11 View Figure 3–11 ). Vein 2rs-m basal to vein 2m-cu. Hind vein 2-cu absent. Propodeum (Fig. 8 View Figure 3–11 ) with one strong transverse carina level with posterior edge of spiracle. Tergite 1 (Fig. 13 View Figure 12–15 ) very long and slender; latero-median carina absent, dorso-lateral carina present after spiracle; spiracle located slightly anterior to middle; tergite and sternite fused; glymma absent. Ovipositor sheath (Fig. 12 View Figure 12–15 ) almost extending to apex of metasoma. Ovipositor slender and straight.
Etymology.
The name of the new genus is derived from the propodeum having one strong transverse carina. The gender is feminine.
Remarks.
The new genus is similar to Syntactus Förster, 1869 in having the apical margin of the clypeus blunt; base of the mandible without a transverse impression; dorsal end of epicnemial carina almost reaching the front edge of the mesopleuron; glymma absent; areolet absent; however, it can easily be distinguished from Syntactus by the following characters in combination: apical margin of clypeus medially almost truncate (Fig. 3 View Figure 3–11 ); propodeum with only one strong transverse carina (Fig. 8 View Figure 3–11 ); area superomedia entirely absent; hind vein 1-cu opposite cu-a; vein 2-cu absent; tergite 1 (Figs 12-14 View Figure 12–15 ) very slender, straight; tergite 2 (Fig. 15 View Figure 12–15 ) granulate; and ovipositor (Fig. 12 View Figure 12–15 ) straight. In Syntactus the apical margin of the clypeus is almost evenly arcuate; propodeum is completely areolated, area superomedia at least partly present; tergite 1 relatively slender, decurved; tergite 2 smooth; and ovipositor upcurved.
In Townes’ (1970) key to Pionini genera, the new genus can be inserted as follows:
| 2 | Outer face of mandible without a basal transverse impression. Subbasal part of lower edge of mandible sharp. Areolet absent | 3 |
| - | Outer face of mandible with a basal transverse impression. Subbasal part of lower edge of mandible rounded. Areolet present or absent | 4 |
| 3 | Propodeum (Fig. 8 View Figure 3–11 ) with only one distinct median transverse carina, lateromedian longitudinal carinae entirely absent. Tergite 1 very slender, straight (Figs 12-14 View Figure 12–15 ). Tergite 2 (Fig. 15 View Figure 12–15 ) shagreened, without punctures. Ovipositor (Fig. 12 View Figure 12–15 ) straight | Unicarinata Sheng, Li & Sun, gen. nov. |
| - | Propodeum at least with posterior transverse carina, lateromedian longitudinal carinae present. Tergite I decurved. Tergite II smooth, punctate. Ovipositor upcurved | 3 ' |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.