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Etyid crabs (Crustacea, Decapoda) from mid‐Cretaceous Reefal strata of Navarra, northern Spain
Author(s) -
KLOMPMAKER ADIËL A.,
ARTAL PEDRO,
VAN BAKEL BARRY W. M.,
FRAAIJE RENÉ H. B.,
JAGT JOHN W. M.
Publication year - 2011
Publication title -
palaeontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.69
H-Index - 63
eISSN - 1475-4983
pISSN - 0031-0239
DOI - 10.1111/j.1475-4983.2011.01072.x
Subject(s) - genus , decapoda , paleontology , cretaceous , carapace , cenomanian , crustacean , taxon , reef , biology , geology , zoology , ecology
All known etyid crabs (Crustacea, Decapoda) from the upper Albian – lower Cenomanian Aldoirar coralgal‐dominated patch reef (Albeniz Unit, Eguino Formation), as exposed at the disused Koskobilo quarry in Navarra, northern Spain, are described, discussed and illustrated. A new species, Xanthosia koskobiloensis , the first member of the genus on record from southern Europe, is erected, and a variety that appears closely related to this, Xanthosia cf. X. koskobiloensis , is recognised. This new taxon could be a forerunner of the early Palaeocene (Danian) Xanthosia gracilis from Fakse (Sjælland, eastern Denmark), with which it shares a morphologically closely similar carapace. On the basis of a revised overview here of all species assigned to it, the genus Xanthosia may have evolved in an environment dominated by deposition of siliciclastics, rather than chalks. In addition , Etyxanthosia fossa has been collected at Koskobilo, and as the distribution of all known specimens demonstrates, E. fossa inhabited various environments. Another new species, Caloxanthus paraornatus , is closely similar as well to a species from Fakse, Caloxanthus ornatus , and constitutes the first record of the genus for southern Europe.