Chitinozoa

Conochitina emmastensis, copyright Valdek Mikli.

Belongs within: Eukaryota.

The Chitinozoa are a group of flask-shaped, organic-walled microfossils known from the mid-Palaeozoic. The affinities of chitinozoans are uncertain; it has been suggested that they may represent the eggs of invertebrates such as worms or mollusks rather than mature, independent organisms.

<==Chitinozoa
    |--Sphaerochitina Eisenack 1955WBN02
    |--Angochitina longicollis Eisenack 1959WBN02
    |--Margachitina margaritana (Eisenack 1937)WBN02
    |--Linochitina odiosaNL12
    |--Rhabdochitina magnaPA04
    |--Laufeldochitina stentorPA04
    |--Kalochitina multispinataPA04
    |--Hercochitina gamachianaPA04
    |--Sagenachitina oblongaPA04
    |--Ancyrochitina mergaPA04
    |--Spinachitina Schallreuter 1963WBN02
    |    `--S. tagourdeauiPA04
    |--CalpichitinaPA04
    |    |--C. densa (Eisenack 1962)WBN02
    |    `--C. lataPA04
    |--EremochitinaPA04
    |    |--E. baculataPA04
    |    `--E. brevisWC04
    |--ArmoricochitinaPA04
    |    |--A. granulataPA04
    |    `--A. nigericaPA04
    |--EisenackitinaPA04
    |    |--E. tongziensisPA04
    |    `--E. uterPA04
    |--BelonechitinaPA04
    |    |--B. cactaceaPA04
    |    |--B. robustaPA04
    |    `--B. vibrissaPA04
    |--DesmochitinaPA04
    |    |--D. complanataPA04
    |    |--D. lecaniellaPA04
    |    `--D. minorPA04
    |--TanuchitinaPA04
    |    |--T. anticostiensisPA04
    |    |--T. bergstroemiPA04
    |    `--T. fusiformisPA04
    |--EuconochitinaWBN02
    |    |--E. alargada Cramer 1967WBN02
    |    |--E. edjelensis (Taugourdeau 1963)WBN02
    |    |--E. elongata (Taugourdeau 1963)WBN02
    |    `--E. vulgarisPA04
    |--Cyathochitina Eisenack 1955WBN02
    |    |--C. calixPA04
    |    |--C. campanulaeformisBU02
    |    |--C. clepsydraPA04
    |    |--C. hunderumensisPA04
    |    |--C. hyalophrysPA04
    |    |--C. jenkinsiPA04
    |    `--C. protocalixPA04
    |--Lagenochitina Eisenack 1931WBN02
    |    |--L. balticaPA04
    |    |--L. dalbyensisPA04
    |    |--L. destombesiPA04
    |    |--L. deunffiPA04
    |    |--L. esthonicaPA04
    |    |--L. langeiPA04
    |    |--L. obeligisPA04
    |    |--L. prussicaPA04
    |    |--L. shizipuensisPA04
    |    `--L. stentorPA04
    `--ConochitinaWBN02
         |--C. brevisWC04
         |--C. chydaeaPA04
         |--C. decipiensPA04
         |--C. emmastensis Nestor 1982WBN02
         |--C. havlicekiPA04
         |--C. langeiPA04
         |--C. parvicollaPA04
         |--C. pervulgataPA04
         |--C. pirumPA04
         |--C. poumotiPA04
         |--C. praeproboscifera Nestor 1994WBN02
         |--C. proboscifera Eisenack 1937WBN02
         |--C. raymondiPA04
         |--C. scabraPA04
         |--C. subcylindricaPA04
         |--C. symmetricaPA04
         `--C. tuba Eisenack 1932WBN02
Nomina nuda: Conochitina malleus van Grootel 1990WBN02

*Type species of generic name indicated

References

[BU02] Bates, D. E. B., & A. Urbanek. 2002. The ultrastructure, development, and systematic position of the graptolite genus Mastigograptus. Acta Palaeontologica Polonica 47 (3): 445–458.

[NL12] Noble, P. J., A. C. Lenz, C. Holmden, M. Masiak, M. K. Zimmerman, S. R. Poulson & A. Kozłowska. 2012. Isotope geochemistry and plankton response to the Ireviken (earliest Wenlock) and Cyrtograptus lundgreni extinction events, Cape Phillips Formation, Arctic Canada. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 631–652. Springer.

[PA04] Paris, F., A. Achab, E. Asselin, Chen X.-H., Y. Grahn, J. Nõlvak, O. Obut, J. Samuelsson, N. Sennikov, M. Vecoli, J. Verniers, Wang X.-F. & T. Winchester-Seeto. 2004. Chitinozoans. In: Webby, B. D., F. Paris, M. L. Droser & I. G. Percival (eds) The Great Ordovician Biodiversification Event pp. 294–311. Columbia University Press.

[WC04] Webby, B. D., R. A. Cooper, S. M. Bergström & F. Paris. 2004. Stratigraphic framework and time slices. In: Webby, B. D., F. Paris, M. L. Droser & I. G. Percival (eds) The Great Ordovician Biodiversification Event pp. 41–47. Columbia University Press.

[WBN02] Won, M.-Z., R. B. Blodgett & V. Nestor. 2002. Llandoverian (Early Silurian) radiolarians from the Road River Formation of east-central Alaska and the new family Haplotaeniatumidae. Journal of Paleontology 76 (6): 941–964.

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