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Eotetragraptus

Pterobranchia - Graptoloidea - Sigmagraptidae

Taxonomy
Eotetragraptus was named by Bouček and Přibyl (1952).

It was assigned to Sigmagraptidae by Maletz et al. (2018).

Species lacking formal opinion data
E. headi

Synonymy list
YearName and author
1952Eotetragraptus Bouček and Přibyl p. 7
2018Eotetragraptus Maletz et al. p. 8

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumHemichordataBateson 1885
RankNameAuthor
classPterobranchiaLankester 1877
subclassGraptolithina(Bronn 1849)
orderGraptoloideaLapworth 1875
suborderSinograptina(Maletz 2009)
familySigmagraptidaeCooper and Fortey 1982
genusEotetragraptusBouček and Přibyl 1952

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. †Eotetragraptus Bouček and Přibyl 1952
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Diagnosis
ReferenceDiagnosis
J. Maletz et al. 2018Four-stiped sigmagraptines with simple, rutellate, often considerably curved thecae; stipes pendent to reclined and reflexed, rarely with dorsal spines; short and wide sicula with distinct rutellum and lateral apertural lobes; proximal development isograptid, dextral, with symmetrically placed slender crossing canals; thecal style simple, widening tubes with rutellate apertures, often with slight lateral lobes.
Measurements
No measurements are available
Composition: "sclero-protein"c
Locomotion: passively mobileo
Life habit: planktonico
Diet: suspension feedero
Vision: blindc
Created: 2004-02-28 15:07:12
Modified: 2009-05-19 07:15:15
Source: o = order, c = class
References: Aberhan et al. 2004, Aberhan 1992

Age range: base of the Floian to the top of the Arenig or 477.70000 to 466.00000 Ma

Collections (10 total)


Time interval Ma Country or state Original ID and collection number
Hunneberg - Kunda481.1 - 464.3Russian Federation (Yaroslavl oblast) E. quadribrachiatus, E. harti (235856)
Arenig478.6 - 466.0USA (Nevada) E. quadribrachiatus (412)
Floian477.7 - 470.0Russian Federation (Siberia) E. harti (205381 205382 205383) E. headi (205565) E. sp. (206143)
Floian - Dapingian477.7 - 467.3Russian Federation (Siberia) E. harti (206142)
Dapingian470.0 - 467.3Russian Federation (Siberia) E. harti (205563)
Darriwilian467.3 - 458.4Russian Federation (Siberia) E. harti (205561)