Helicosina, Kuwahara & Marshall & Yau, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5523.4.5 |
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publication LSID |
lsid:zoobank.org:pub:999559E0-4E12-45DC-AED9-88374AA3E3D1 |
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DOI |
https://doi.org/10.5281/zenodo.13974001 |
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persistent identifier |
https://treatment.plazi.org/id/03A1976C-1269-3A77-73CA-6CEAFA3DF2B6 |
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treatment provided by |
Plazi |
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scientific name |
Helicosina |
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Key to the species of Helicosina
This key is based almost entirely on male characters, as the females are almost indistinguishable morphologically.
1 Body length ≤ 1.8 mm. Male fore and hind femora slightly thickened (length 1.9–2.0 × and 4.4–5.6 × width, respectively) ( Fig. 2A View FIGURE 2 ). Surstylus straight along anterior margin ( Fig. 4C View FIGURE 4 ). Posterior opening of epandrium roughly triangular, widest ventrally ( Fig. 4D View FIGURE 4 ).......................................................................... H. crena sp. nov. [CRI]
- Body length ≥ 1.9 mm. Male fore and hind femora distinctly thickened (length 2.9–3.2 × and 3.1–3.7 × width, respectively) ( Figs 2C, 2E View FIGURE 2 ). Surstylus sinuate, curved along anterior margin ( Figs 5C View FIGURE 5 , 6C View FIGURE 6 ). Posterior opening of epandrium ovoid or circular, widest around the middle ( Figs 5D View FIGURE 5 , 6D View FIGURE 6 )................................................................... 2
2 Eye height 3.1–3.2 × genal height; face only slightly protruding. Male S5 longer, width 2.4–2.7 × length ( Fig. 5A View FIGURE 5 ). Posterior opening of epandrium almost circular (height 0.9–1.0 × width) ( Fig. 5D View FIGURE 5 ). Surstylus bulging basally, apical half gently sinuate ( Fig. 5C View FIGURE 5 ). Postgonite parallel-sided basally, truncate apically ( Fig. 5B View FIGURE 5 ). Distiphallus with a lateral row of thickened setulae ( Fig. 5B View FIGURE 5 )............................................................................... H. sica sp. nov. [ECU]
- Eye height 3.6–3.7 × genal height; face distinctly protruding. Male S5 shorter, width 4.2–4.5 × length ( Fig. 6A View FIGURE 6 ). Posterior opening of epandrium roughly ovoid (height 1.3–1.4 × width) ( Fig. 6D View FIGURE 6 ). Surstylus roughly parallel-sided basally, apical half strongly bent at about a right angle ( Fig. 6C View FIGURE 6 ). Postgonite broadened basally, triangular apically ( Fig. 6B View FIGURE 6 ). Distiphallus densely microtomentose dorsally but without longer setulae ( Fig. 6B View FIGURE 6 )............................ H. valga sp. nov. [CRI, PAN]
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.
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