Stromboidea
In Conrad, 1854 no Description is found, only the name Rostellaria extenta. The name "Rostellaria extenta" occurs on the caption for plate 17. The related figure is on plate 16. The captions of plates 16 and 17 had erroneonusly been swapped. The name "Rostellaria extenta" can be found on p. 289.
Description of Aporrhais (Platyoptera) extenta by Conrad, 1855, p. 260:
- "Shell independent of labrum fusiform, with prominent revolving rounded lines and intermediate fine lines, from one to three, and longitudinal microscopic lines; volutions rounded, covered towards the apex with a polished calcareous deposit; labrum within with impressed radiating lines, becoming well-marked furrows towards the base."
Locus typicus: Jackson, Hinds County, Mississippi, USA.
Stratum typicum: Moody's Branch Formation, Jackson Group, upper Eocene
Rostellaria extenta Conrad in Wailes, 1854, pl. XVI, fig. 3
Aporrhais (Platyoptera) extenta Conrad, 1855, pl. XVI, fig. 3
Specimens from institutional collections:
Platyoptera extenta (Conrad in Wailes, 1854); Eocene; Town Creek, Jackson, Hinds County, Mississippi, USA; Coll. BM(NH) no. GG12761; Copyright BM(NH)
References:
- Conrad, T.A. 1854. Fossil Testacea of the Tertiary Green-sand Marl-bed of Jackson, Miss. in Wailes, B. L. C. (1854). Report on the Agriculture and Geology of Mississippi. Embracing a Sketch of the Social and Natural History of the State.. 289, pls. 14-17.
- T.A. Conrad - Observations on the Eocene deposit of Jackson, Mississippi, with the descriptions of thirty-four new species of shells and corals (Proceedings of the Academy of Natural Sciences of Philadelphia Vol. VII 1854, 1855), Fulltext
- Wailes, B. L. C. (1854). Report on the Agriculture and Geology of Mississippi. Embracing a Sketch of the Social and Natural History of the State.. i-xx + 371pp., pls. 1-17, E. Barksdale, State Printer [Jackson].
