Eucalyptocrinites spp.

Ausich, William I., Wilson, Mark A. & Vinn, Olev, 2012, Crinoids from the Silurian of Western Estonia, Acta Palaeontologica Polonica 57 (3), pp. 613-631 : 622

Eucalyptocrinites spp.

Fig. 3C .

Material.—Numerous examples of Eucalyptocrinites sp. occur, including TUG 860−1736, TUG 860−1737, TUT 405− 238 to GIT 450−240, and GIT 1395−17 to TUG 1395−37 from the Ninase Member, Jaani Formation, Wenlock, Silurian at Suuriku Cliff and Undva Cliff, and from the Kaugatuma Formation at Kaugatuma Cliff.

Discussion.—As discussed above, specimens assigned to Eucalyptocrinites sp. are so assigned because most lack preservation of both calyx plate sculpturing and the shape of the partition plates are known ( Fig. 3C ). Unfortunately, these are the majority of Eucalyptocrinites specimens known. As mentioned above, we suspect that the majority of specimens assigned to Eucalyptocrinites sp. may belong to Eucalyptocrinites sp. 1 .

Figures

Fig. 3. Camerate crinoids from the Silurian of Estonia. A, B. Middle Äigu Beds, Kaugatuma Formation (Pridoli), Kaugatuma Cliff. A. Eucalyptocrinites tumidus sp. nov., GIT 405−243. A1, lateral view of crown, note modestly expanding partition plates; A2, basal view of calyx, note nodose calyx plates; A3, tegmen view of crown, note flat tegmen top. B. Calliocrinus sedgwickianus sp. nov., TUG 1395−8. Basal view of a portion of the basal and radial circlets, all circular pits are the trace fossil Oichnus. C. Eucalyptocrinites sp., GIT 405−238, Jaani Formation (Wenlock), Suuriku Cliff. Lateral view of calyx. D. Eucalyptocrinites sp. 2., TUG 1395−13, Ninase Member, Jaani Formation (Wenlock), Panga Cliff. D1, tegmen view of crown; D2, B−ray view of partial crown, note deep elongate groove on well−preserved partition plate. E. Periechocrinus longimanus (Angelin, 1878), GIT 405−4−1, Jaani Formation (Wenlock), Janni Cliff. Lateral view of partial calyx, calyx sutures very indistinct. F. Eucalyptocrinites sp. 1, TUG 1375−3, Jaani Formation (Wenlock), Undva Cliff. Lateral view of broken crown. G. Calliocrinus sp., TUG 1395−6, Ninase Member, Jaani Formation (Wenlock), Suuriku Cliff. Broadly bifurcating spine. H. Eucalyptocrinites sp. 1, TUG 1375−2, Jaani Formation (Wenlock), Undva Cliff. Lateral view of crown of juvenile. Scale bars 10 mm.