Echinoderms from the Lower Devonian (Emsian) of Bolivia (Malvinokaffric Realm)
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摘要

Crinoid faunas from the Lower Devonian of South America are poorly known. Two new taxa are described from the Emsian Icla Formation at Cerro Kochis in the Cochabamba Department: the rhodocrinitid, Lutocrinus boliviaensis n. gen. n. sp. and an class="named-content genus-species" id="named-content-1">Griphocrinus pirovanoian> n. sp. Two additional camerates are reported from the Emsian Belèn Formation of the Altiplano region in the La Paz Department, including an class="named-content genus-species" id="named-content-2">Ctenocrinus branisaian> n. sp. and Boliviacrinus isaacsoni an id="xref-ref-29-1" class="xref-bibr">McIntosh, 1988an>. In addition, a specimen of the blastoid, Pachyblastus dicki Bremier and Macurda, 1972, was recovered from the Altiplano region. These crinoids and material previously collected by Leonardo Branisa, including specimens of an class="named-content genus-species" id="named-content-3">C. branisaian> n. sp., Apurocrinus sucrei an id="xref-ref-28-1" class="xref-bibr">McIntosh, 1981an>, B. isaacsoni an id="xref-ref-29-2" class="xref-bibr">McIntosh, 1988an>, and an class="named-content genus-species" id="named-content-4">L. boliviaensisan> n. sp., are described and revised. The specimens give new insights into the Lower Devonian Malvinokaffric Realm of Bolivia, a relatively new frontier in crinoid paleontology.

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