Spongilla purbeckensis Young, 1878
publication ID |
https://doi.org/ 10.4202/app.00354.2017 |
persistent identifier |
https://treatment.plazi.org/id/03A93569-FFD3-B67F-FF65-F96F4FF2F110 |
treatment provided by |
Felipe |
scientific name |
Spongilla purbeckensis Young, 1878 |
status |
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Spongilla purbeckensis Young, 1878 View in CoL
Fig. 12 View Fig .
Type horizon: Purbeck Limestone , Lower Cretaceous .
Type locality: Stare Cove , Dorset, England .
Refrences: Young 1878; Hinde 1883; Waldschmidt and Leroy 1944; Greensmith 1978; Clements 1967.
Description (emended from Young 1878 and Hinde 1883).— Oxeas (megascleres) abundant, fusiform, acerate, slightly curved, thickest in the centre (ca. 450 × 15–25.5 μm, Hinde 1883) and gradually diminishing to the tips. On the contrary, oxeas are minutely tubercled ( Young 1878).
Remarks. — Clements (1967) considered that the supposed sponge spicules of this species are not fossils at all but are actually silica pseudomorphs after lenticular crystals of gypsum. So, this species should be considered with caution. Attribution of this material to any Recent genera seems precarious due to its age. On the other hand, if we accept its sponge origin, the very few diagnostic characters (megascleres of similar type occur in several genera and families) allow only the attribution to the order Spongillida .
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