AnimaliaacceptedgenusAccepted
Nodella

Nodella

GBIF:127639238

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Descriptions(4)

? 1972 Nodella faceta nov. sp.; Rozhdestvenskaja: 35, pl. 13, fig. 7.? 2013 Nodella faceta Rozhdestvenskaja, 1972; Maillet: 56, pl. VI, fig. 1 2013 Nodella? sp. indet.; Maillet: 57, pl. VI, fig. 4.? 2013 Nodella faceta Rozhdestvenskaja, 1972; Casier & Maillet in Casier et al., 264, fig. 8 F.
Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel, Posada, Luis-Carlos Sánchez De (2016): Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Zootaxa 4068 (1): 1-78, DOI: 10.11646/zootaxa.4068.1.1
Description. Medium-sized elongated amplete carapace, symmetrical in lateral view. Overlap not observed. Hmax median; Lmax median; Wmax slightly dorsal. Straight hinge line and dorsal margin. Anterior cardinal angle of about 135 °. Posterior cardinal angle of about 130 °. Well rounded free margins, with anterior and posterior margins more arched than the ventral one. Anterior and posterior parts of the carapace symmetrical in lateral view. Posterior part of the carapace flattened. Three indistinct lobes, one at mid-length projecting over the dorsal margin, one in the posterior part and one in the anterior part of the carapace. Surface smooth.
Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel, Posada, Luis-Carlos Sánchez De (2016): Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Zootaxa 4068 (1): 1-78, DOI: 10.11646/zootaxa.4068.1.1
Discussion. This specimen is too badly preserved to be identified with certainty, even to generic level. However, the general outline of the carapace and the indistinct apparent lobes suggest it belongs to N. faceta Rozhdestvenskaja, 1972. Occurrence. Middle Givetian (Candás Fm, mb C), Asturias (Peran-Perlora section).
Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel, Posada, Luis-Carlos Sánchez De (2016): Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Zootaxa 4068 (1): 1-78, DOI: 10.11646/zootaxa.4068.1.1
Material. 1 specimen (1 C).
Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel, Posada, Luis-Carlos Sánchez De (2016): Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Zootaxa 4068 (1): 1-78, DOI: 10.11646/zootaxa.4068.1.1

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Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications

checklist

This dataset contains the digitized treatments in Plazi based on the original journal article Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel, Posada, Luis-Carlos Sánchez De (2016): Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Zootaxa 4068 (1): 1-78, DOI: 10.11646/zootaxa.4068.1.1

Abstract

Asturian ostracods of the Givetian carbonate Candás Formation are documented for the first time from the Peran-Perlora and Carranques reference sections. More than 1,200 specimens were extracted from 44 samples by means of the hot acetolysis method. In all, 75 taxa are described herein, of which 21 are formally described and one, Evlanella peranensis Maillet n. sp., is new. All the taxa are marine benthic and belong to the Eifelian Mega-Assemblage. The assemblages recognized are representative of semi-restricted to shallow open-marine palaeoenvironments above the storm wave base. The stratigraphical distribution of the taxa shows a strong faunal renewal in the top of the Candás Formation. Long-ranging taxa found at the base of the formation, of which many are known from the base of the Middle Devonian, disappear within the base of the member C and are replaced above, around the Middle/Upper Givetian boundary, by more cosmopolitan taxa characteristic of the Frasnian. The lower half of the member C is also characterized both by unstable environments and occurrence of some short-ranging opportunistic ostracod taxa. This renewal within shallow water ostracod communities is probably a consequence of the global Taghanic Biocrisis, leading world-widely to extinctions in several faunal groups. Faunal affinities with Givetian ostracod taxa reported in other areas of the world reflect the commonly accepted palaeogeographical patterns. Close relations between the Cantabrian Zone (NW-Spain), the Armorican Massif (W- France), the Mouthoumet Massif (S-France) and North Africa (Morocco and Algeria) suggest a narrow oceanic space between the western European terranes and the northern Gondwanan margin that involves an advanced phase of closure of the Medio-European Ocean.

Key words: Middle Devonian, new species, faunal renewal, systematic, Taghanic Biocrisis

Maillet S, Milhau B, Vreulx M, Posada L S D, plazi (2016). Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications. Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.11646/zootaxa.4068.1.1 accessed via GBIF.org on 2026-06-18.

CC0Published 12/31/2016View dataset
GBIF Usage Key
127639238
Dataset Key
b9c1e3a3-e591-4b34-9f30-d6d88a230673
Origin
source
Backbone Key
3255107
Taxon ID
03B94C39E85F4B66FF22FC4DFB8AF9CE.taxon
Last Crawled
6/11/2026
Last Interpreted
6/11/2026