Coleolus tenuicinctus, copyright Alan Goldstein.

Belongs within: Animalia.

The Coleoloidae are a group of elongate tubular shells of uncertain affinities known from the Lower Cambrian to the Carboniferous (Fisher 1962).

Characters (from Fisher 1962; Yochelson & Hlavin 1985): Tubuliform calcium-carbonate shells, extremely elongate-conical, almost cylindrical, commonly slightly curved toward apex; cross section circular to elliptical; comparatively thin-walled; laminated, interior surface smooth. Exterior surface smooth or with oblique or longitudinal ornamentation. Opercula and septa unknown. Length 0.5–75 mm; diameter 0.5–2.5 mm at aperture.

<==Coleoloidae YH85
    |--Coleoloides Walcott 1889 F62
    |    `--*C. typicalis Walcott 1890 F62, KB09 [incl. C. trigeminatus Missarzhevsky in Rozanov et al. 1969 KB09]
    |--Coleoprion Sandberger 1847 F62
    |    `--*C. gracilis Sandberger 1847 F62
    |--Paoshanella Yin 1937 F62
    |    `--*P. flexuosa Yin 1937 F62
    |--Salopiella Cobbold 1921 F62
    |    `--*S. obliqua Cobbold 1921 F62
    |--Spirodentalium Walcott 1890 F62
    |    `--*S. osceola Walcott 1890 F62
    `--Coleolus Hall 1876 YH85 [incl. Coleoprion Hall 1876 non Sandberger 1847 F62]
         |--*C. tenuistriatus YH85
         |--C. aciculatum Hall 1879 [=Dentalium aciculatum] YH85
         |--C. clintonensis [=Orthoceras (Coleolus) clintonensis] P68
         |--C. curvatus Kindle 1912 YH85
         `--C. tenuicinctus (Hall 1876) [=*Coleoprion tenuicinctum] F62

*Type species of generic name indicated


[F62] Fisher, D. W. 1962. Small conoidal shells of uncertain affinities. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W98–W143. Geological Society of America, and University of Kansas Press.

[KB09] Kouchinsky, A., S. Bengtson, W. Feng, R. Kutygin & A. Val'kov. 2009. The Lower Cambrian fossil anabaritids: affinities, occurrences and systematics. Journal of Systematic Palaeontology 7 (3): 241–298.

[P68] Purnell, L. R. 1968. Catalog of the type specimens of invertebrate fossils. Part I: Paleozoic Cephalopoda. United States National Museum Bulletin 262: 1–198.

[YH85] Yochelson, E. L., & W. J. Hlavin. 1985. Coleolus curvatus Kindle ("Vermes") from the Cleveland Member of the Ohio Shale, late Devonian (Famennian) of Ohio. Journal of Paleontology 59 (5): 1298–1304.

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