Onomeris underwoodi Cook, 1896
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publication ID |
https://doi.org/ 10.5281/zenodo.199966 |
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DOI |
https://doi.org/10.5281/zenodo.6206529 |
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persistent identifier |
https://treatment.plazi.org/id/920FBB59-1963-BF13-FF6F-75BFFF12F8A3 |
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treatment provided by |
Plazi |
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scientific name |
Onomeris underwoodi Cook, 1896 |
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Onomeris underwoodi Cook, 1896 View in CoL
( Figures 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 , 5 View FIGURE 5 )
O. underwoodi Cook, 1896: 43 View in CoL
Hoffman 1950: 14; Chamberlin & Hoffman 1958: 12; Hoffman 1999: 18 (list species name).
Material examined: Type material: 1 male lectotype (designated by Dr. R.L. Hoffman),> 120 male and female paratypes ( USNM [ NMNH] 2599). U.S.A., Alabama, Lee County, Auburn.
Other material examined: 2 M, 1 F (FMNH-INS 14133). U.S.A., Mississippi, Harrison County, Harrison Expt. For., coll. D. Beyers & M. Jenks, in black cherry tree hole, 29.iii.1984; 1 M, (FMNH-INS 56301). U.S.A., Alabama, Jackson County, 5 miles NE Garth, coll. S. Peck, 19.v.1972; 6 M, 4 F (FMNH-INS 56299). U.S.A., Georgia, Effingham County, Kildare, leg. L. Hubricht, 03.x.1959, det. Hoffman; 1 M, 1 F (FMNH-INS 56303). U.S.A., Alabama, Shelby County, Oak Mountain State Park, coll. H. S. Steenes, 16.x.1960; 13 M, 6 F ( VMNH). U.S.A., Tennessee, Polk County, Hiawassee River bluff, 2.7 miles NW Reliance, coll. C. Hubricht, 14.V.1961; 2 M, 2 F ( VMNH). U.S.A., Tennessee, Blount County, Chilhowee Mountain, Foothills Parkway, 3.5 miles SW Walland, coll. C. Hubricht, 23.IX.1967.
Locality from the literature: N. to Kentucky ( Hoffman 1999)
Diagnosis: Differs from O. sinuata n. comb. in absence of a trichostele on the tibia of the telopod ( Fig. 5 View FIGURE 5 A), tibial process slender ( Fig. 5 View FIGURE 5 B); the presence of larger coxal lobes on the 17th leg pair of the male ( Fig. 2 View FIGURE 2 B), presence of 5+1 black ocelli ( Fig. 1 View FIGURE 1 A), and anal shield obviously concave medially at caudal edge ( Fig. 5 View FIGURE 5 E). Differs from O. australora in syncoxital lobe of telopod not divided into two lobes ( Fig. 3 View FIGURE 3 B), third antennomere 2x second ( Fig. 1 View FIGURE 1 A), sixth antennomere 4x second ( Fig. 1 View FIGURE 1 A), 2.1 times longer than wide, three striae crossing thoracic shield dorsally ( Fig. 1 View FIGURE 1 B).
Redescription: Length of non-stretched but unrolled specimens of both sexes ca 4–5 mm, width 2.2–2.8 mm, respectively.
General coloration strongly faded in alcohol, dark, brown to greyish, often with contrastingly lighter markings on the lateral part of the tergites. Legs, antennae and lateral parts of head grey.
Antenna: third antennomere as large as first and second combined, sixth antennomere as large as first, second, fourth and fifth combined, the latter 2.1 times longer than wide.
Male anal shield at posterior margin medially strongly concave ( Fig. 5 View FIGURE 5 E).
Male 17th leg with strongly developed coxal lobe ( Fig. 5 View FIGURE 5 D).
Telopod as in the genus description, with slender tibial process and subtrapeziform subcoxital lobe ( Figs 3 View FIGURE 3 B, 5A–C).
Intraspecific variation: Since the shape of the male telopod, especially those of the tibial process (difference from O. sinuata ) and the subcoxital lobe (difference from O. australora ) are important taxonomic characters, these structures were studied in 25 males of the extensive type series and 20 non-type males. No differences in the telopod shape could be observed. Only the shape of the femoral process shows a very high variation, probably because of the membranous nature of this structure.
Comments: The telopods and other characters of this species were not properly described ( Cook 1896) and never redescribed, leading to confusion about the status of the species ( Hoffman 1950), or even the genus ( Mauriès 2005).
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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Onomeris underwoodi Cook, 1896
| Wesener, Thomas 2010 |
O. underwoodi
| Cook 1896: 43 |