Onomeris sinuata ( Loomis, 1943 )

Wesener, Thomas, 2010, Revision of the American Pill Millipedes I: Onomeris and Trichomeris (Diplopoda, Glomerida, Glomeridae), Zootaxa 2725, pp. 28-40: 36-38

publication ID

http://doi.org/ 10.5281/zenodo.199966

persistent identifier

http://treatment.plazi.org/id/920FBB59-196E-BF1C-FF6F-77DAFCE7F852

treatment provided by

Plazi

scientific name

Onomeris sinuata ( Loomis, 1943 )
status

new combination

Onomeris sinuata ( Loomis, 1943)  new combination

( Figures 4View FIGURE 4 & 7View FIGURE 7)

Trichomeris sinuata Loomis, 1943: 374 

Chamberlin & Hoffman 1958: 13; Hoffman 1999: 18 (list species name).

Material examined: Type material: 1 male holotype, in excellent condition except that leg 18 is missing ( MCZ 88115View Materials). U.S.A., Alabama, Madison County, Monte Sano State Park 10 km E of Huntsville, along pipeline trail below summit escarpment, coll. L. Hubricht, 12.iv. 1941.

Other material examined: 2 M, 4 F (FMNH-INS 56316). Same locality as above, but next to limestone outcrops, NE shadow, 34 º 44 ' 10.30 " N, 086º 30 '00.10" W, coll. T. Wesener & H. Walsh, 30.iii. 2010; 2 M, 1 F, same data as previous, sent as vouchers to the MNHN; 1 M, 1 F, same data as previous, sent as vouchers to the ZFMK; 5 M, 4 F, (FMNH-INS 56302), U.S.A., Virginia, Lee County, Cumberland Gap NP, trail to Skylight Cave, coll. W. A. Shear, 10.vii. 1972, dry litter near log; 3 M, 8 F ( VMNH). U.S.A., Tennessee, Monroe County, River Bluff, 1.5 miles E Tellico Plain, coll. C. Hubricht, 23.V. 1962

Diagnosis: Differs from O. underwoodi  and O. australora  in presence of a trichostele on the tibia of the telopod ( Fig. 7View FIGURE 7 C), a basally wide, triangular tibial process ( Fig. 7View FIGURE 7 D); the presence of small coxal lobes on the 17 th leg pair of the male ( Fig. 7View FIGURE 7 A), and anal shield very weakly concave medially at caudal edge.

Redescription: Length of non-stretched but unrolled specimens of both sexes ca 4–5 mm, width 2.2–2.8 mm General coloration Dark brown with laterally lighter grey markings. Tergites 2–11 laterally on metazona with oval greyish-white area, which does not reach margins of tergite. Appendages dark brown.

Antenna: third antennomere as large as 2 x second, sixth antennomere as large as first, second, fourth and fifth combined, the latter 2.5 times longer than wide.

Male anal shield at posterior margin weakly concave.

Male 17 th leg with weakly developed coxal lobe ( Fig. 7View FIGURE 7 A)

Male 18 th leg with fused coxite and four podomeres, shape typical for genus ( Fig. 7View FIGURE 7 B).

Telopod as in the genus description, with basally wide, apically slender, triangular tibial process and a short tibial trichostele ( Figs 7View FIGURE 7 C, D). Subcoxital lobe well-rounded ( Fig. 7View FIGURE 7 C).

Remarks: The original description of O. sinuata  as the type species of Trichomeris Loomis, 1943  is based on erroneous descriptions and drawings. The drawings of the male leg pair 17 as well as the telopod published in the original description by Loomis disagree with the telopod present in the dissected holotype and with those of the new specimens collected at the original type locality. According to the original description ( Loomis 1943: fig. 1), the femur does not feature a trichostele, nor does the tibia. Furthermore, the tibial process of the telopod in Loomis’ original illustration is shorter than it is in the original holotype. The holotype of O. sinuata  closely resembles O. underwoodi  and O. australora  and therefore allows the placement of this species into Onomeris  .

To make matters even more complicated, a second, still undescribed genus of pill millipede occurs sympatrically with O. sinuata  at Monte Sano State Park, Alabama. However, the possibility that the erroneous drawings by Loomis (1943) could be based on this undescribed genus can be ruled out, since the telopods of the undescribed genus are very distinct from both the original drawings of Trichomeris  and the telopods of Onomeris  and show little similarity with those of the only other known American Glomerida  genus, Glomeroides  (see illustrations in Silvestri 1929, Shear 1986, Wesener & VandenSpiegel 2009).

MCZ

Museum of Comparative Zoology

MNHN

Museum National d'Histoire Naturelle

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

VMNH

Virginia Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Glomerida

Family

Glomeridae

Genus

Onomeris

Loc

Onomeris sinuata ( Loomis, 1943 )

Wesener, Thomas 2010
2010
Loc

Trichomeris sinuata

Loomis 1943: 374
1943