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Cryptophyllus

Cryptophyllus

GBIF:127639233

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Descriptions(4)

2013 Cryptophyllus sp. P 1; Maillet: 98, pl. XII, fig. 2.
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 carapace, sub-triangular in lateral view. Moult retention ostracod with at least 6 exuviae. Large exuviae, slender posteriorly. Straight dorsal margin. Rounded umbo prominent over dorsal margin at 2 / 5 posterior. Anterior cardinal angle of about 150 °. Posterior one of about 130 °. Free margins of the carapace describing a regular bow. Anterior and posterior margins flattened. Anterior part of the carapace slightly wider and higher than posterior one. Hmax at 2 / 5 posterior; Lmax almost median; Wmax clearly dorsal and slightly posterior (umbo). Overlap of the valves unknown. 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 morphology is similar to C. sp. C of Maillet (2013) from the Givetian of the Ardenne. Occurrence. Middle Givetian (Candás Fm, mbs A and B), 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. 11 specimens (3 C, 7 V, 1 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

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CLASSIFICATION

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AnimaliaArthropodaOstracodaPalaeocopidaCryptophyllidaeCryptophyllus

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Source Information

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
127639233
Dataset Key
b9c1e3a3-e591-4b34-9f30-d6d88a230673
Origin
source
Backbone Key
8498249
Taxon ID
03B94C39E8524B6BFF22FA0BFB3CF83E.taxon
Last Crawled
6/11/2026
Last Interpreted
6/11/2026
View on GBIFSource Reference