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1 June 2012 Fossil sponge gemmules, epibionts of Carpopenaeus garassinoi n. sp. (Crustacea, Decapoda) from the Sahel Alma Lagerstätte (Late Cretaceous, Lebanon)
Gilles Petit, Sylvain Charbonnier
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Abstract

The fossil crustaceans from the Sahel Alma Lagerstätte (Late Cretaceous, Lebanon), housed in the collection de Paléontologie of the Muséum national d'Histoire naturelle, Paris, were examined in order to highlight the presence of epibionts. Marine sponge gemmules were recognized and are described for the first time on the rostrum of a new shrimp Carpopenaeus garassinoi Charbonnier n. sp. The exceptional conditions of fossilization in the Sahel Alma Lagerstätte also permitted the preservation of the gemmule germination and the first development stage of the young sponge. If the shrimp does not appear to benefit from the association, it ensures the transport and the colonization of new territories for the sponge. This association sponge/shrimp is not known either in the recent or in the past. It represents one of the first observations of a fossil shrimp epibiont. Carpopenaeus garassinoi Charbonnier n. sp. is the youngest record for the genus Carpopenaeus Glaessner, 1945 which was previously known from the Tithonian of Zandt (Germany) and from the Cenomanian of Lebanon (Hakel, Hadjoula Lagerstätten).

© Publications Scientifiques du Muséum national d'Histoire naturelle, Paris.
Gilles Petit and Sylvain Charbonnier "Fossil sponge gemmules, epibionts of Carpopenaeus garassinoi n. sp. (Crustacea, Decapoda) from the Sahel Alma Lagerstätte (Late Cretaceous, Lebanon)," Geodiversitas 34(2), 359-372, (1 June 2012). https://doi.org/10.5252/g2012n2a6
Received: 20 September 2010; Accepted: 21 March 2011; Published: 1 June 2012
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KEYWORDS
Carpopenaeus
Crustacea
Decapoda
épibiontes
epibionts
éponges
gemmules
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