Cornuodus longibasis ( Lindström, 1955 )

Zhen, Yong Yi, Percival, Ian G. & Webby, Barry D., 2003, Early Ordovician Conodonts from Far Western New South Wales, Australia, Records of the Australian Museum 55 (2), pp. 169-220 : 190

publication ID	https://doi.org/10.3853/j.0067-1975.55.2003.1383
persistent identifier	https://treatment.plazi.org/id/37439A20-CB3E-FF28-FCA1-FEE4FB67FC5C
treatment provided by	Felipe (2021-08-21 20:31:20, last updated 2023-11-09 19:44:58)
scientific name	Cornuodus longibasis ( Lindström, 1955 )
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Cornuodus longibasis ( Lindström, 1955)

Fig. 13A–D View Fig

Cornuodus longibasis Serpagli,1974:43 , pl.7, fig. 2a,b, pl. 20, fig.21. Cornuodus longibasis .– Cooper, 1981: 161, pl. 26, figs. 10–11. Cornuodus longibasis .– Löfgren,1999: 175–184, pls. 1–3 (cum syn.). Cornuodus longibasis .–Johnston & Barnes, 2000:15, pl. 7, figs.3, 4,

8, 9 (cum syn.). Cornuodus longibasis .–Zhen et al., in press: pl. 2, fig. 19 (cum syn.).

Material. Five specimens from limestone nodules within shales of the upper Yandaminta Quartzite, and 109 specimens from the overlying Tabita Formation at Mount Arrowsmith ; three specimens from unnamed dolomitic limestone unit at Koonenberry Gap .

Remarks. Löfgren (1999) recently defined a septimembrate apparatus for the species. However, we experienced great difficulties in differentiating our specimens, which all seem to be S elements . No P elements have been confirmed in the western New South Wales collections.

References

Cooper, B. J., 1981. Early Ordovician conodonts from the Horn Valley Siltstone, central Australia. Palaeontology 24: 147 - 183.

Lindstrom, M., 1955. Conodonts from the lowermost Ordovician strata of south-central Sweden. Geologiska Foreningens i Stockholm Forhandlingar 76: 517 - 604.

Lofgren, A., 1999. A septimembrate apparatus model for the Ordovician conodont genus Cornuodus Fahraeus, 1966. In Studies on Conodonts - Proceedings of the Seventh European Conodont Symposium, Bologna-Modena, 1998, ed. E. Serpagli. Bollettino della Societa Paleontologica Italiana 37: 175 - 186.

Serpagli, E., 1974. Lower Ordovician conodonts from Precordilleran Argentina (Province of San Juan). Bollettino della Societa Paleontologica Italiana 13: 17 - 98.

Figures

Fig. 13. A–D, Cornuodus longibasis (Lindström, 1955): A, Sa element, AMF120342, Y4–2, lateral view; B, Sa element, AMF120343, M/A11-3, lateral view; C, Sd2 element, AMF120344, M/A11-3, lateral view; D, Sb element, AMF120345, M/A11-2, inner lateral view. E–I, Drepanodus sp.: E, sculponeaform element,AMF120346, C1613, outer lateral view; F, sculponeaform element,AMF120347, W5, inner lateral view; G. arcuatiform element,AMF120348, C1612, inner lateral view; H, arcuatiform element, AMF120349, C1613, outer lateral view; I, graciliform element, AMF120350, Y4–8, outer lateral view. Scale bars 100 µm.