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Cyathactis

Anthozoa - Stauriida - Ptychophyllidae

Taxonomy
Cyathactis was named by Soshkina (1955).

It was assigned to Cyathactidae by Kaljo (1958); to Lykophyllidae by Merriam (1972); to Ptychophyllidae by Hill (1981); and to Rugosa by Sepkoski (2002).

Species
C. balticus, C. gazellensis
Species lacking formal opinion data
C. C. cormorantense, C. tenuiseptata

Synonymy list
YearName and author
1955Cyathactis Soshkina
1958Cyathactis Kaljo
1972Cyathactis Merriam p. 33
1981Cyathactis Hill
2002Cyathactis Sepkoski

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RankNameAuthor
kingdomAnimalia()
phylumCnidariaHatschek 1888
classAnthozoaEhrenberg 1834
—Hexacorallia()
subclassRugosa(Milne-Edwards and Haime 1850)
RankNameAuthor
orderStauriidaVerrill 1865
suborderCyathophyllinaNicholson 1889
familyPtychophyllidaeDybowski 1873
genusCyathactisSoshkina 1955

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Cyathactis Soshkina 1955
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†Cyathactis balticus Kaljo 1958
†Cyathactis gazellensis Merriam 1972
Diagnosis
ReferenceDiagnosis
C. W. Merriam 1972Small to medium-sized trochoid and ceratoid Lykophyllidae. Septa numerous, long, thin, smooth, fairly straight at maturity; a wide dissepimentarium of small and medium globose dissepiments. Tabularium medium wide with closely spaced, mostly incomplete, axially flattened tabulae and marginal tabellae. No septal stereozone. Crowded dissepiments with anguloconcentric chevron pattern in transverse section.
Measurements
No measurements are available
Composition: low Mg calciteo
Locomotion: stationaryo
Attached: yeso
Life habit: epifaunalo
Diet: suspension feedero
Vision: blindc
Created: 2004-02-27 16:55:09
Modified: 2004-02-28 16:53:57
Source: o = order, c = class
Reference: Kiessling 2004

Age range: base of the Silurian to the top of the Pragian or 443.80000 to 407.60000 Ma

Collections (30 total)


Time interval Ma Country or state Original ID and collection number
Gamachian449.5 - 443.7Canada (Quebec) C. affinis (80615)
Hirnantian - Rhuddanian445.2 - 440.8Russian Federation (Siberia) C. sp. (205661)
Silurian443.8 - 419.2USA (Alaska) C. sp. B (100903)
Rhuddanian443.4 - 440.8Canada (Quebec) C. sp., C. C. cormorantense (12938)
Juuru443.4 - 439.0Estonia C. balticus (174099)
Rhuddanian - Aeronian443.4 - 438.5Russian Federation (Siberia) C. euryone (206541 206542 206543)
Llandovery443.4 - 433.4Russian Federation (Yakutiya) C. euryone (79513 79525)
Llandovery443.4 - 433.4Russian Federation C. typus (24773)
Llandovery443.4 - 433.4USA (Kentucky) C. sedentarius (13236 13237) C. typus, C. sedentarius (13194)
Llandovery443.4 - 433.4Canada (Quebec) C. cormorantense, C. euryone (12940) C. sp. (12424 12557)
Aeronian440.8 - 438.5Canada (Quebec) C. euryone (12939) C. sp. (79165)
Telychian438.5 - 433.4Russian Federation (Tyva) C. typus (79925)
Telychian438.5 - 433.4Australia (Queensland) C. sp. (39223)
Wenlock433.4 - 427.4USA (Alaska) C. sp. (100931) C. sp. A (100930)
Wenlock433.4 - 427.4Russian Federation (Tyva) C. tenuiseptatus (79083)
Wenlock433.4 - 427.4Mongolia C. typus (79643)
Ludlow427.4 - 423.0USA (Alaska) C. sp. B (100895)
Ludlow427.4 - 423.0USA (California) C. gazellensis (79733 229626 229632)
Pragian410.8 - 407.6Vietnam C. tenuiseptata (83248)