Rotularia

Rotularia bognoriensis, from here.

Belongs within: Serpulidae.

Rotularia is a genus of helically coiled tubeworms known from the Upper Cretaceous to the Eocene (Howell 1962).

Caracters (from Howell 1962): Tube helically coiled, with same diameter throught most of length, ending at apertural end in restricted tube of smaller diameter; restricted portion (and occasionally part of unrestricted tube posterior to it) extending tangentially from coiled portion; posterior end of tube usually attached to substratum; outer surface of tube smooth or concentrically wrinkled; one or two longitudinal keels occasionally present.

<==Rotularia Defrance 1827 H62 (see below for synonymy)
    |--*R. spirulaea (Lamarck 1818) [=Serpula spirulaea] H62
    |--R. australis Cox 1953 B59
    |--R. bognoriensis B59
    |--R. chathamensis Boreham 1959 B59
    |--R. concava (Sowerby 1813) B59
    |--R. damesi (Noetling 1885) B59
    |--R. discoideum B59
    |--R. fallax B59
    |--R. kitchini Bonarelli & Nagera 1921 B59
    |--R. leptostoma B59
    |--R. lituola (Leymerie 1846) B59
    `--R. ornata S98

Rotularia Defrance 1827 H62 [incl. Burtinella Morch 1861 B59, Moerchia Mayer 1860 (preoc.) B59, Tubulostium Stoliczka 1869 H62]

*Type species of generic name indicated

REFERENCES

[B59] Boreham, A. U. E. 1959. Cretaceous fossils from the Chatham Islands. Transactions of the Royal Society of New Zealand 86 (1): 119–125, pl. 111.

[H62] Howell, B. F. 1962. Worms. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W144–W177. Geological Society of America, and University of Kansas Press.

[S98] Stilwell, J. D. 1998. Late Cretaceous Mollusca from the Chatham Islands, New Zealand. Alcheringa 22 (1): 29–85.