Crisia

Colonies of Crisia among anemones and limpets, photographed by James Watanabe.

Belongs within: Stenolaemata.

Crisia is a living genus of cyclostome bryozoans forming tufted or straggling colonies less than 3 cm high.

Characters (from Hayward & Ryland 1985): Sterile internodes, except proximally, of three to many zooids; fertile internodes of at least five zooids. Membranous sac of gonozooid not subdivided. Polypide with eight tentacles.

<==Crisia Lamouroux 1812 [Camptostega, Crisiadae, Crisiidae] H15
    |--C. biciliata H15
    |--C. cornuta H15
    |--C. cribraria H15
    |--C. cuneata Maplestone 1905 [incl. C. circinata Waters 1914] H15
    |--C. cylindrica Busk 1886 H15
    |--C. eburnea [incl. C. occidentalis] H15
    |--C. edwardsiana H15
    |--C. elongata Milne Edwards 1838 (see below for synonymy) H15
    |--C. geniculata Milne Edwards 1838 (see below for synonymy) H15
    |--C. hoernesii Reuss 1847 H15
    |--C. inflata Waters 1914 H15
    |--C. kerguelensis Busk 1876 [incl. C. eburnea var. laxa Busk 1886] H15
    |--C. patagonica H15
    `--C. subaequalis Reuss 1869 H15

Crisia elongata Milne Edwards 1838 [incl. C. denticulata Philipps 1899, C. denticulata var. gracilis Busk 1886, C. margaritacea Busk 1875, C. nigrijuncta Ortmann 1889, C. punctifera Haswell 1879, C. sinensis d’Orbigny 1850-52, C. terraereginae Haswell 1880] H15

Crisia geniculata Milne Edwards 1838 [=Crisia cornuta var. geniculata, Crisidia cornuta var. geniculata, Filicrisia geniculata] H15

*Type species of generic name indicated

REFERENCES

[H15] Harmer, S. F. 1915. The Polyzoa of the Siboga Expedition – Part I. Entoprocta, Ctenostomata and Cyclostomata. E. J. Brill: Leyden.

Hayward, P. J., & J. S. Ryland. 1985. Cyclostome Bryozoans: keys and notes for the identification of the species. Brill.