Ochterus unidentatus Chen & Nieser, 1992
publication ID |
https://doi.org/ 10.5281/zenodo.210038 |
DOI |
https://doi.org/10.5281/zenodo.6167329 |
persistent identifier |
https://treatment.plazi.org/id/BF337F1E-FFD5-1413-FF0D-76FDFB7FFE5C |
treatment provided by |
Plazi |
scientific name |
Ochterus unidentatus Chen & Nieser, 1992 |
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Ochterus unidentatus Chen & Nieser, 1992 View in CoL
Material examined. Ecuador, Pichincha province, La Unión del Toachi, Toachi river right tributary, 850 m amsl, 28.VI.2009, 3 3, legit F. Cianferoni, C. Monte & F. Zinetti, coll. CFC.
Notes. A rather narrow, elongate species, with the hemielytra variable in pattern ( Fig. 1 View FIGURE 1 ): the two yellowish spots on the corium can range from being almost invisible (in dark specimens) to developing in stripes (in light specimens). The latter can also be present on the rest of the corium and on the clavus (cfr. Nieser & Chen 1992).
The anterior tibiae are strongly curved in males ( Fig. 1 View FIGURE 1 ) on the apical part (a characteristic not reported in the original description).
The central section of the frontal plate (sensu Kormilev 1971) is smaller than the width of one eye, surpassing the ventral border of the eyes, with numerous faintly impressed ridges on the surface, varying from horizontal in the middle to almost vertical in the upper part; in the lower part they follow the margin of ventral shape of the frons ( Fig. 2 View FIGURE 2 ).
The species can only be positively identified by the shape of the right paramere. The general shape of the right paramere is strongly curved as in O. barberi Schell, 1943 (from the USA and Mexico). Nieser (in verbis) indicates that in O. bidentatus Schell, 1943 from Peru (cfr. Nieser & Chen 1992) this structure emerges from the genital capsule in a similar way ( Fig. 3 View FIGURE 3 ; cfr. Schell 1943). Despite this, the knowledge of taxonomy and distribution of the New World Ochteridae is still too low to support any hypothesis of relationships between species. The whole apical part of the right paramere is enlarged, turning around its axis, the tip of the apical part rounded, turned toward the internal side, and the rest of the apical part is wider in the middle and ends with a little hook. It should be noted that the general shape, curvature and structures strongly change when rotating the paramere ( Fig. 4 View FIGURE 4 ), so is extremely important to observe it from different positions.
This species was not included among Ochteridae of South America by Heckman (2011).
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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