Kolesnikov K.A.1,2*, Inkina N.S.3, Shuvalova J.V.2, Zhuravlev A.Yu.1,2 2025. A new Early Permian “lithistid” sponge (Porifera: Demospongiae: Anthaspidellidae) from the Polar Urals // Invert. Zool. Vol.22. No.4. P.545–552 [in English].
1 Department of Biological Evolution, Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow 119234 Russia.
2 Borissiak Palaeontological Institute, Russian Academy of Sciences, Profsoyuznaya St. 123, Moscow 117647 Russia.
3 Yushkin Institute of Geology, FRC, Komi Scientific Centre, Uralian Branch, Russian Academy of Sciences, Pervomayskaya St. 54, Syktyvkar, Komi Republic 167982 Russia.
* Corresponding author
Kirill Kolesnikov: kolkir@mail.ru ORCID https://orcid.org/0000-0002-7609-335X
Natalia Inkina: nsinkina@geo.komisc.ru
Andrey Zhuravlev: ayzhur@mail.ru ORCID https://orcid.org/0000-0003-1611-6916
Julia Shuvalova: pinmuse@gmail.com ORCID https://orcid.org/0000-0002-5075-6952
doi: 10.15298/invertzool.22.4.02
ABSTRACT: A new genus and species of an anthaspidellid (“lithistid”) demosponge is described from the Lower Permian strata of the Polar Urals. This small branching modular anthaspidellid with a highly regularly organized choanosomal ladder-like skeleton built of equally spaced straight dendroclones without accessory spicules. This relatively simple anthaspidellid with a highly regularly organized skeleton became a forerunner of the last diversification bloom of this family in the Permian.
KEY WORDS: sponges, Anthaspidellidae, Demospongiae, Early Permian, Polar Urals.