Calyculus Noel, 1973

Holcová, Katarína, Rifl, Matic & Michalík, Jozef, 2024, Calcareous nannofossil communities during Late Triassic Mass Extinction and Early Jurassic recovery in the NW Tethys: evidence from Slovakia, Western Carpathians, Acta Palaeontologica Polonica 69 (3), pp. 485-500 : 494

publication ID

https://doi.org/10.4202/app.01099.2023

persistent identifier

https://treatment.plazi.org/id/7C7E5538-8615-AD47-F212-A2E2FB9C379B

treatment provided by

Felipe

scientific name

Calyculus Noel, 1973
status

 

Genus Calyculus Noel, 1973 View in CoL

Type species: Calyculus cribrum Noël, 1973 ; Toarcian, Fecocourt; France.

Calyculus ? kardolinae sp. nov.

IFPNI: PFN003347.

Fig. 7 View Fig AD–AF.

Etymology: From the Kardolína section.

Holotype: CHMHZ-KH-0003, holotype is situated in small rock fragment coated by gold. High, broad distal-shield composed of radial elements, a proximal-shield reduced to a narrow cycle of elements, central-area empty ( Fig. 7 View Fig AD).

Type locality: The Kardolína section near Tatranská Kotlina, Belá Tatra Mountains ( 49°15’00.0”N 20°18’53.4”E), Slovakia GoogleMaps .

Type horizon: Beds 33–37 of the Kardolína section, Rheatian, Fatra Formation.

Material.—CHMHZ-KH-0003, small rock fragment coated by gold. All specimens on the surface of rock fragment ( Fig. 7 View Fig AD–AF).

Diagnosis.—A broad distal shield composed of radial, nonimbricating elements, the number of elements is only estimated at 14–16 due to recrystallization. The proximal shield is reduced to a simple, narrow circle of elements, with a moderately elevated rim. The central area is empty. Generic assignment is questionable.

Description.—Elevated elliptical placoliths, proximal shield reduced, rim elevation moderate, central-area empty. Diameter 3.5–5.0 µm (5.0 µm in the holotype).

Stratigraphic and geographic range.—The species was found only in Beds 33–37 of the Kardolína section, Rheatian, Fatra Formation, Slovakia.

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