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Similotheca bastionense

Hyolithida - Similothecidae

Taxonomy
Similotheca bastionensis was named by Malinky and Skovsted (2004). Its type specimen is MGUH 27082, a shell, and it is not a trace fossil. Its type locality is GGU 314835 - Albert Heim Bjerge, which is in a Dyeran carbonate limestone in the Bastion Formation of Greenland.

It was corrected as Similotheca bastionense by Skovsted (2006).

Synonymy list
YearName and author
2004Similotheca bastionensis Malinky and Skovsted pp. 554 - 555 figs. 2B, ?C
2006Similotheca bastionense Skovsted

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
RankNameAuthor
Lophophorata
phylumHyolitha
orderHyolithidaMathew 1962
familySimilothecidae
genusSimilotheca
speciesbastionense()

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.

Diagnosis
ReferenceDiagnosis
J. M. Malinky and C.B. Skovsted 2004Similotheca having coarse transverse rugae on the dorsum and narrow longitudinal concavities immediately adjacent to the dorsal keel.

Conch orthoconic with large apical angle
such that conch has wide appearance; venter flat, grading
into sharp, bluntly rounded lateral edges; dorsum low with
prominent, well−developed median ridge; side of ridge
marked by prominent ribs; each dorsal flank has a narrow,
shallow longitudinal concavity adjacent to the median ridge,
and the flanks overall are only slightly inflated, with a gentle
slope away from the ridge. Venter flat, with faint transverse
growth lines on shell; ligula seemingly long and rounded at
anterior edge, with steeply dipping sides.