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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Eocyathispongia
Taxonomy
Eocyathispongia was named by Yin et al. (2015). Its type is Eocyathispongia qiania.
It was assigned to Porifera by Yin et al. (2015).
It was assigned to Porifera by Yin et al. (2015).
Species
E. qiania (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Eocyathispongia Yin et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z. Yin et al. 2015 | The fossil specimen is a small, solitary sessile sponge (about 1.2 mm in width and depth, 1.1 mm high; Fig. 1) that is soft- bodied and cup-shaped, with a holdfast-like base. It lacks an overt anterior/posterior or dorsal/ventral axis but has a clear basal/ apical polarity, terminating in a major funnel-like opening at the end facing up. The animal consisted of three independent tubular chambers, emergent from the common base. The largest chamber gives rise to an outflow funnel, which is ∼300 μm in diameter at its exit, but each of the other two chambers also resolves into apical, osculum-like openings. The largest chamber is curved and bulbous, whereas the other two emerge more di- rectly up from the common base of the specimen. The whole specimen is covered by flattened cells (8–12 μm in diameter, not uniform in shape or orientation), except for an area covered by a lawn of very closely packed, protruding, short, hollow tubes (some are >10 μm tall, and they are typically 5–8 μm in di- ameter). The holdfast-like base is solid, consisting of an outer layer and an inner layer. There are no basement membrane-like structures between the two layers. Inside the funnel, the inner surface is lined with an array of spaced pits, arranged non- randomly in rows, pairs, and sometimes rosettes. The pits are about 8–10 μm in diameter. |