PBDB Taxon

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Daxatina

Cephalopoda - Ceratitida - Trachyceratidae

Taxonomy

Daxatina was named by Strand (1929) [Sepkoski's age data: Tr Ladi-u Sepkoski's reference number: 302]. Its type is Trachyceras canadense.

It was assigned to Trachyceratidae by Tozer (1981); to Trachyceratinae by Tozer (1994); to Ceratitida by Sepkoski (2002); and to Anolcitinae by Mietto and Manfrin (2008).

Species

D. canadensis, D. laubei, D. limpida, D. megabrotheus

Synonyms

Dawsonites was named by Boehm (1903). Its type is Trachyceras canadense.

It was reranked as Clionites (Dawsonites) by Smith (1927); it was replaced with Daxatina by Strand (1929), Tozer (1994).

It was assigned to Clionites by Smith (1927); and to Trachyceratidae by Spath (1951).

Synonymy list

Year	Name and author
1903	Dawsonites Boehm
1927	Clionites (Dawsonites) Smith p. 92
1929	Daxatina Strand p. 9
1951	Dawsonites Spath p. 45
1981	Daxatina Tozer p. 96
1994	Daxatina Tozer p. 165
2002	Daxatina Sepkoski
2008	Daxatina Mietto and Manfrin p. 396

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca

Rank	Name	Author
class	Cephalopoda	Cuvier 1797
subclass	Ammonoidea	()
order	Ceratitida	Hyatt 1884
superfamily	Trachyceratoidea	(Haug 1894)
family	Trachyceratidae	Haug 1894
subfamily	Anolcitinae
genus	Daxatina

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. †Daxatina Strand 1929

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†Daxatina canadensis Whiteaves 1889

†Daxatina laubei Tozer 1994

†Daxatina limpida Tozer 1994

†Daxatina megabrotheus Tozer 1994

Invalid names: Dawsonites Boehm 1903 [replaced]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	14	23.7	16.1	34.1	21.7	7.35
shell diameter	14	41.2	18.6	73.8	47.2	19.6
shell inflation	14	10.5	5.00	15.0	12.9	3.86

Composition:

aragoniteo

Environment:

marinec

Locomotion:

actively mobileo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:33:06

Modified:

2005-10-06 16:36:47

Source: o = order, c = class

References: Kiessling 2003, Kiessling 2004

Age range: base of the Ladinian to the top of the Julian or 241.46400 to 233.60000 Ma

Collections (54 total)

Time interval	Ma	Country or state	Original ID and collection number
Ladinian	241.464 - 237.0	Canada (British Columbia)	D. canadensis (44147 44155)
Ladinian	241.464 - 237.0	Svalbard and Jan Mayen	Dawsonites canadaensis, Dawsonites sp. (212215) Dawsonites canadensis (212204) Dawsonites sp., Dawsonites canadensis (212201)
Julian	237.0 - 233.6	Italy	D. canadensis (50866 142046) D. laubei (141967 141968 141976 142035 142050) D. sp. (50840 50841 50847 50850 50851 50865 141965 142036 142041 142042) D. sp., D. canadensis, D. laubei (142066) Trachyceras bipunctatum (50844 50873)
Julian	237.0 - 233.6	Canada (British Columbia)	D. canadensis (137095 137381 138610 138611 138612 138628 138634 139045 141635) D. laubei (138631) D. limpida (49715 56877) D. megabrotheus (44150 141652) Trachyceras canadense (141772)
Julian	237.0 - 233.6	USA (Nevada)	D. sp. (186864 186865 186870 186871 186873 186874 186875 186876 186877)
Julian	237.0 - 233.6	Spain	D. canadensis (211538)
Carnian	237.0 - 227.3	Canada (British Columbia)	D. limpida (49716)
Carnian	237.0 - 227.3	Italy	D. sp., D. canadensis (50837)
Carnian	237.0 - 227.3	Svalbard and Jan Mayen	Dawsonites canadensis (44452)
Late/Upper Triassic	237.0 - 201.4	USA (Alaska)	Trachyceras canadense (112261)