Journal
GEOBIOS
Volume 45, Issue 3, Pages 275-283Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.geobios.2011.10.003
Keywords
Cambrian; Ptychopariida; Murero Formation; Spain; Laurentia; Gondwana; Enrolment
Categories
Funding
- Ministerio de Educacion y Ciencia de Espana [CGL2006-12975/BTE]
- Fondo Social Europeo
- MEC
- [E-17]
- [PM067/2006]
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A new trilobite species, Schopfaspis? graciai, from the middle Cambrian of Spain is the first member of Alokistocaridae reported from west Gondwana. A cladistic analysis of this trilobite and other Gondwanan trilobites of possible alokistocarid affinities (Schopfaspis granulosa, Chelidonocephalus anatolicus, Derikaspis toluni, Kounamkites multiformis) suggests that this family can be divided into two subfamilies: Alokistocarinae and Altiocculinae. Schopfaspis? graciai nov. sp. and Schopfaspis granulosa are assigned to the subfamily Altiocculinae laying in a more basal position than Altiocculus species. The cladistic analysis also demonstrates a possible relationship of Chelidonocepholus anatolicus and Derikaspis tonal( with Alokistocaridae. Enrolment is analysed in this new trilobite describing novelties in the ventral surface of the cephalon which allowed interlocking of the trunk and cephalon in a discoidal enrolment-type. (C) 2012 Published by Elsevier Masson SAS.
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