Loupanus pliensbachicus Cifer, 2020
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publication ID |
https://doi.org/ 10.4202/app.00618.2019 |
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persistent identifier |
https://treatment.plazi.org/id/C1142978-FFDD-AF6B-FF3F-A81A57CBFCEB |
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treatment provided by |
Felipe |
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scientific name |
Loupanus pliensbachicus Cifer |
| status |
sp. nov. |
Loupanus pliensbachicus Cifer sp. nov.
Fig. 6K–O View Fig .
ZooBank LCID: urn:lsid:zoobank.org:act:61C753C2-739E-464D-BBC2-AF835FB78963
Etymology: Named for the Pliensbachian stage. It is the first species of Loupanus found in the Pliensbachian.
Type material: Holotype, PMS 2397 View Materials , sample Rö416: 170562 ( Fig. 6K View Fig ) . Paratypes, PMS 2397 View Materials , sample Rö416: 170559; PMS 2398 View Materials , Rö416: 170757; PMS 2398 View Materials , 170704 View Materials ; PMS 2398 View Materials , 170560 View Materials .
Type locality: Mount Rettenstein , Northern Calcareous Alps, Austria .
Type horizon: Sample Rö 416, grey marly limestone, Lower Pliensbachian .
Material.—Sample Rö38: stub Rö38_1 (one specimen); sample Rö416: stubs Rö416_5 (four specimens), Rö416_7 (seven specimens); sample Rö417: stub Rö417 (two specimens), Mount Rettenstein , Northern Calcareous Alps, Austria, Lower Pliensbachian .
Diagnosis. —Round cortical shell with five three-bladed spines, forming the edges of two tetrahedrons.
Description.—Three spines are in the equatorial plane, forming a 120° angle between them. Perpendicularly to this plane are two bipolar spines. All spines three-bladed, massive, tapering distally. Spines in equatorial plane equal in length, approximately as long as the diameter of the cortical shell. One polar spine as long as the equatorial spines, the other polar spine slightly longer. The cortical shell is spherical. Outer layer of small pore frames irregularly polygonal in shape, composed of thick bars with small nodes at vertices. The nodes can be faint ( Fig. 6K–M View Fig ) or rather strong and can bear small spines ( Fig. 6O View Fig ).
Dimensions. —See Table 3.
Remarks.— Loupanus pliensbachicus Cifer sp. nov. differs from the Triassic Loupanus thompsoni Carter, 1993 ( Carter 1993: 86, pl. 3: 4, 5) by having a spherical rather than fivesided cortical shell. The spines are shorter and the bipolar spines are unequal in length. The structure of the cortical shell and spines resembles Thurstonia? timberensis Whalen and Carter, 1998 , but the number of spines is different; Loupanus has 5 spines (3 in equatorial plane) whereas Thurstonia has 6 spines (4 in equatorial plane).
Stratigraphic and geographic range. —LowerPliensbachian. Northern Calcareous Alps ( Austria).
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