Zyzzya sp.

Łukowiak, Magdalena, Pisera, Andrzej & Stefanska, Tetiana, 2019, Uncovering the hidden diversity of Paleogene sponge fauna of the East European Platform through reassessment of the record of isolated spicules, Acta Palaeontologica Polonica 64 (4), pp. 871-895 : 886

publication ID

https://doi.org/ 10.4202/app.00612.2019

persistent identifier

https://treatment.plazi.org/id/AE74871F-B877-B720-FCF7-FF09FC58FCD8

treatment provided by

Felipe

scientific name

Zyzzya sp.
status

 

Zyzzya sp.

Fig. 6P–R View Fig .

Material.—Upper Eocene, south-central Ukraine.

Remarks. —The verticillate acanthostrogyles ( Fig. 6Q, R View Fig ) and acanthostrongyle ( Fig. 6P View Fig ) can be assigned to one of the species of Zyzzya . Five species are currently distinguished within this genus ( van Soest et al. 2018). Amongst them, Z. fuliginosa ( Carter, 1879) is characterized by presence of both these spicule types (compare van Soest et al. 1994: figs. 19, 20). The length of the acanthostrongyles found in modern Z. fuliginosa is up to 250 μm (see van Soest et al. 1994: table 2), while the fossil spicule is 165 μm long, thus falling within the range observable in that taxon. There are also some other spicules of similar morphology ( Fig. 5U). However, contrary to the verticillate acanthostrongyles of Zyzzya , these spicules are strongly sculptured also at the tips. Such morphology makes their attribution to Acarnidae less likely.

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Acarnidae

Genus

Zyzzya

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