Data/hora: 02/06/2024 04:53:48

Provedor de dados: 	Naturalis Digital Academic Repository	
País: 	Netherlands	
Título: 	[Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki &amp; B.W.M. van Bakel (eds.)]: Pristinaspinidae, a new family of Cretaceous kiwaiform stem-lineage squat lobster (Anomura, Chirostyloidea)	
Autores: 	Ahyong, S.T.; Roterman, C.N.	
Data: 	2014	
Ano: 	2014	
Palavras-chave: 	Squat lobster; Kiwa; Kiwaidae; Pristinaspina; Fossil; 42.74; 38.22.	
Resumo: 	The chirostyloid squat lobster Pristinaspina gelasina from the Upper Cretaceous of Alaska is most closely related to members of the genus Kiwa (Kiwaidae) as indicated by the presence of supraocular spines, a medially carinate rostrum and similar carapace groove patterns. Evidence from morphology, stratigraphic position and molecular divergence estimates of extant chirostyloids supports its position in the stem of Kiwaidae. Pristinaspina, however, also differs significantly from kiwaids and is here assigned to a new family, Pristinaspinidae. The chief distinction between the free-living pristinaspinids and vent- or seep-associated kiwaids (and an important synapomorphy of the latter) is the enlargement of the metabranchial regions in kiwaids, which meet in the mid-line and separate the cardiac region from the intestinal region. The enlarged metabranchial regions of kiwaids may have improved respiration in poorly oxygenated, chemosynthetically affected waters. This appears to track a major shift in the deep-water ecology of kiwaiform squat lobsters, that is, the movement into chemosynthetic habitats.	
Tipo: 	Article / Letter to the editor	
Identificador: 	http://www.repository.naturalis.nl/record/523037

http://www.repository.naturalis.nl/document/564651	
Formato: 	application/pdf	
Fonte: 	Scripta Geologica (0375-7587) vol.147 (2014) p.125	
Fonte: 	(c) Naturalis