AnimaliaNot EvaluatedacceptedspeciesAccepted
Cytherellina perlonga

Cytherellina perlonga

(Kummerow, 1953) Kummerow, 1953

GBIF:127639143

0year

ABOUT

Descriptions(4)

Description. Medium-sized very elongated carapace, biconvex in dorsal view, sub-rectangular in lateral view. Overlap of the larger LV over the RV at free margins of the carapace, especially anteriorly and posteriorly. Hmax at 1 / 4 anterior; Lmax at 2 / 5 ventral; Wmax slightly ventral. Lmax = 2 Hmax. Almost straight dorsal margin forming an angle of 120 ° with posterior margin and of 130 ° with the anterior one. Almost straight (very slightly convex) ventral margin. Ventral and dorsal margins almost parallel, slightly converging posteriorly. Well rounded anterior margin, more convex ventrally. Regularly convex posterior margin. Anterior part of the carapace slightly higher than the posterior one. 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
cf. 1953 Orthocypris perlonga nov. sp.; Kummerow: 55, pl. 6, fig. 7. cf. 1965 b Cytherellina perlonga (Kummerow, 1953); Becker: 175, pl. 7, fig. 5. cf. 2013 Cytherellina sp. A, aff. perlonga (Kummerow, 1953); Casier & Maillet in Casier et al.: 254, 264, fig. 9 l. cf. 2013 b Cytherellina perlonga (Kummerow, 1953); Maillet et al.: pl. 1, fig. 15. 2013 Cytherellina cf. perlonga (Kummerow); Maillet: 104, pl. XIII, figs. 18 – 19.
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. The general outline reminds C. perlonga (Kummerow, 1953). However, the bad preservation of our specimens makes the identification difficult. Occurrences. Middle Givetian (Fromelennes Fm, Flohimont and Moulin Boreux Mbs), Ardenne (Aisne section), 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. 5 specimens (5 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
127639143
Dataset Key
b9c1e3a3-e591-4b34-9f30-d6d88a230673
Origin
source
Taxon ID
03B94C39E86E4B57FF22FD5DFB9FFA96.taxon
Last Crawled
6/11/2026
Last Interpreted
6/11/2026