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Achistrum ludwigi

Holothuroidea - Apodida - Achistridae

Taxonomy
Ancistrum ludwigi was named by Croneis and McCormack (1932). It is considered to be a form taxon. It is a 3D body fossil. Its type locality is Claypit, Bridgeport, Wise County, which is in a Missourian marine claystone in the Graford Formation of Texas.

It was recombined as Achistrum (Achistrum) ludwigi by Hampton (1958); it was recombined as Achistrum ludwigi by Deflandre-Rigaud (1952), Summerson and Campbell (1958), Gutschick (1959) and Zawidzka (1971).

Sister species lacking formal opinion data
A. monochordatum

Synonymy list
YearName and author
1932Ancistrum ludwigi Croneis and McCormack p. 144 figs. pl. 21 figs 2, 17, 18, 54
1952Achistrum ludwigi Deflandre-Rigaud p. 9
1958Achistrum (Achistrum) ludwigi Hampton p. 75
1958Achistrum ludwigi Summerson and Campbell p. 967 figs. pl. 126, figs 1,2
1959Achistrum ludwigi Gutschick p. 133 figs. pl. 25 figs. 13-19
1971Achistrum ludwigi Zawidzka p. 434 figs. pl. 1 fig. 4

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
RankNameAuthor
—Echinozoa()
classHolothuroidea()
orderApodida
familyAchistridae
genusAchistrum
speciesludwigi()

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.

†Achistrum ludwigi Croneis and McCormack 1932
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Diagnosis
No diagnoses are available