AnimaliaNot EvaluatedacceptedspeciesAccepted
Loquitzella mesodevonica

Loquitzella mesodevonica

Zagora, 1968

GBIF:127639177

0year

ABOUT

Descriptions(5)

? 1963 Euglyphella sp. 1; Le Fèvre: pl. 6, figs. 84 – 85. 1968 Loquitzella mesodevonica nov. sp.; Zagora: 55 – 56, pl. 12, figs. 15 – 16. 1968 Loquitzella mesodevonica Zagora; Zagora & Zagora: tabl. 1. 1974 Loquitzella mesodevonica Zagora; Blumenstengel: pl. 4, figs. 3 – 4. 1977 Loquitzella mesodevonica Zagora; Becker & Sánchez de Posada: 158 – 159, pl. 7, figs. 9 – 11, pl. 14, fig. 1 – 3. 1979 Loquitzella sp. 59, aff. Loquitzella mesodevonica Zagora; Feist & Groos-Uffenorde: 145, pl. 6, figs. 41 – 42. 1985 Loquitzella sp. 59, aff. Loquitzella mesodevonica Zagora; Lethiers et al.: 71, 73, pl. 11, fig. 11. 2004 Loquitzella mesodevonica Zagora; Becker in Becker et al.: 63 – 64, pl. 8, figs. 5 – 7. 2005 Loquitzella sp. 59, aff. L. mesodevonica sensu Groos-Uffenorde, 1979; Dojen: pl. 17, fig. 11. 2013 Loquitzella aff. mesodevonica Zagora; Maillet: 131, pl. XVII, figs. 16 – 18.
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. Large equivalve carapace, sub-triangular in lateral view. Carapace slender posteriorly. Hmax at 1 / 6 anterior; Lmax at 1 / 4 dorsal; Wmax at 1 / 3 anterior and mid-height. Straight dorsal margin. Slightly convex ventral margin, oblique posteriorly. Ventral and dorsal margins converging posteriorly. Flattened anterior margin, regularly convex and forming an angle of about 120 ° with the dorsal margin. Posterior end very narrow (1 / 3 of Hmax) and regularly convex. Anterior part of the carapace clearly higher than the posterior one. Whole surface of the carapace, including free margins, papillose. Some nodes or slight spines, orientated posteriorly, pointing over the posterior margin of the valves. Curved ridge beginning in the antero-ventral part (at 1 / 3 anterior and 1 / 3 ventral) and pointing over the dorsal margin at mid-length.
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
Diagnosis. Zagora (1968, p. 56).
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 species, very characteristic by its morphology, remains quite rare in the Givetian of Asturias. Occurrences. Givetian (Moniello Fm and Candás Fm, mb A), Asturias (Peran-Perlora section), Middle / Upper Givetian, Mouthoumet Massif (Berco Petito section); Givetian, Morocco; Middle Devonian, Harz; Lower Devonian, Celtiberia, Thuringia and Montagne Noire.
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. 7 specimens (1 C, 4 V, 2 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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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
127639177
Dataset Key
b9c1e3a3-e591-4b34-9f30-d6d88a230673
Origin
source
Taxon ID
03B94C39E8604B58FF22FB3AFD00FEF5.taxon
Last Crawled
6/11/2026
Last Interpreted
6/11/2026