PBDB Taxon

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Baliactis

Asteroidea - Hadrosida - Palaeasteridae

Taxonomy

Baliactis was named by Spencer (1922) [Sepkoski's age data: O Cara D]. It is not extant.

It was assigned to Asteroidea by Spencer (1922); to Taeniactininae by Spencer (1927), Lehmann (1957); to Helianthasterinae by Owen (1965); to Taeniactinidae by Spencer and Wright (1966); to Hemizonida by Sepkoski (2002); to Palasteriscinae by Dean Shackleton (2005); and to Palaeasteridae by Blake (2018).

Species

B. devonicus, B. ordovicus, B. scutatus, B. tuberatus

Synonymy list

Year	Name and author
1922	Baliactis Spencer
1927	Baliactis Spencer pp. 375-377
1957	Baliactis Lehmann p. 81
1965	Baliactis Owen p. 560
1966	Baliactis Spencer and Wright p. U65
2002	Baliactis Sepkoski
2005	Baliactis Dean Shackleton p. 95
2018	Baliactis Blake p. 39

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
—	Ambulacraria
phylum	Echinodermata

Rank	Name	Author
subphylum	Eleutherozoa
—	Asterozoa	()
class	Asteroidea
order	Hadrosida
family	Palaeasteridae
genus	Baliactis

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. †Baliactis Spencer 1922

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†Baliactis devonicus Spencer 1927

†Baliactis ordovicus Spencer 1922

†Baliactis scutatus Lehmann 1957

†Baliactis tuberatus Lehmann 1957

Diagnosis

Reference	Diagnosis
J. Dean Shackleton 2005	Adjacent adambulacrals overlap; loss of transversely-orientated ridge to bear adambulacral spines; loss of paxillate aboral spines.

Measurements

No measurements are available

Composition:

high Mg calcitec

Ontogeny:

accretion, addition of partsp

Environment:

marinep

Locomotion:

slow-movingc

Life habit:

low-level epifaunalc

Diet:

carnivorec

Vision:

limitedc

Dispersal:

waterp

Dispersal 2:

planktonicp

Created:

2004-02-28 15:35:10

Modified:

2010-02-09 06:02:08

Source: c = class, p = phylum

References: Aberhan 1992, Aberhan et al. 2004

Age range: Early/Lower Emsian or 410.62000 to 399.50000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Emsian	410.62 - 399.5	Germany	B. devonicus, B. tuberatus, B. scutatus (26904)