Abstract
The invertebrate collection of the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN-In) is one of the most important in Latin America. It has more than 1411 type batches with ~90 type specimens of echinoderms. For the present study we analyzed 56 lots of crinoids from the MACN-In. We also checked and updated the identification, when necessary. Seven species belonging to 6 genera were identified; 23 specimens remain unidentified. The diversity of crinoids for Chile, Uruguay and Brazil and Antarctica is discussed. The MACN-In has several lots of crinoids from different parts of the world and numerous specimens of the 2 representative species from Argentina, Isometra vivipara Mortensen, 1917 and Phrixometra nutrix (Mortensen, 1918). This is the first published inventory of crinoids from samples deposited at the MACN-In collection, which will be a useful tool for future studies regarding echinoderms, particularly crinoids.
Highlights
The Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN) is one of the most important museums of Latin America, with 23 national collections, including the MACN-In (“Colección Nacional de Invertebrados”)
The 56 studied lots of crinoids deposited at the MACN-In were composed of 286 specimens from 7 species belonging to 6 genera and 4 families: Antedonidae, Charitometridae, Comatulidae, and Tropiometridae, all of them belonging to the order Comatulida
74 of the 126 species of echinoderm present in Argentina are registered in the MACN-In collection, being the classes Crinoidea and Echinoidea the most represented (Table 2)
Summary
The Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN) is one of the most important museums of Latin America, with 23 national collections, including the MACN-In (“Colección Nacional de Invertebrados”). This collection has more than 1411 type lots, with more than ~90 type specimens of echinoderms (Tablado & Venerus, 2000; Tablado & Mantinián, 2004; Miquel et al, 2007). Echinoderms in Argentina are represented by 126 species, where Asteroidea and Ophiuroidea are the most representative groups (Brogger et al, 2013). The most diverse group within this class is Comatulida, commonly called “feather
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