Order

Trachelocrinida Sumrall, Sprinkle et Guensburg, 1997

Selection of related publications

Kõrts, A. 1989. Brachiolar plates of Bockia (Eocrinoidea) from the Middle Ordovician of Estonia and Leningrad Region. Fossil and Recent Echinoderm researches, pp. 34-37. Academy of Sciences of the Estonian SSR Institute of Geology.

Bockelie, J. F. 1981. The Middle Ordovician of the Oslo Region, Norway: 30. The eocrinoid genera Cryptocrinites, Rhipidocystis and Bockia. Norsk Geologisk Tidsskrift 61, 2, 123-147.

Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346. Valgus.

Hecker, R. F. 1940. Nižnesilurijskie i devonskie iglokožie. Carpoidea, Eocrinoidea i Ophiocistia nižnego silura Leningradskoj oblasti i Èstonii. Transactions of the Paleontological Institute (PIN) 9, 4, 5-82.

Hecker, R. F. 1938. New data on Rhipidocystis Jkl (Oder Digitata n. o., class Carpoidea Jkl) and on a new Genus Bockia (subclass Eocrinoidea Jkl, class Crinoidea Mill.) from the Ordovician of Leningrad province, USSR, and Estonia. Doklady Akademii Nauk SSSR 19, 5, 421-425.

List of species

1. Heckerocrinus cucumis (Hecker, 1938) | Idavere Substage

2. Heckerocrinus grava (Bockelie, 1981) | Ordovician

3. Heckerocrinus heintzi (Bockelie, 1981) | Darriwilian

4. Heckerocrinus laevis (Hecker, 1938) | Kukruse Stage→Idavere Substage

5. Heckerocrinus mirabilis (Bockelie, 1981) | Lower Ordovician

6. Heckerocrinus neglecta (Hecker, 1938) | Volkhov Stage→Uhaku Stage

7. Heckerocrinus skulptus (Hecker, 1938) | Kunda Stage→Aseri Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Echinodermata
Subphylum	Blastozoa
Class	Eocrinoidea
Order	Digitata
	Simonkovicrinida
	Trachelocrinida
Family	Heckerocrinidae
	Bolboporitidae
	Cryptocrinitidae
Genus	Gadovocrinus
	Polyptychella