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| Kato, H.; Nakashima, R.; Yanagisawa, Y.. |
| Two new species of the oregoniid crab genus Hyas are described from the Lower Pliocene of northern Japan, H. chippubetsuensis sp. nov. from the Chippubetsu Formation exposed along the Tadoshi River (Fukagawa City, central Hokkaido) and H. tentokujiensis sp. nov. from the Tentokuji Formation at Daisen City (central part of Akita Prefecture). These two new taxa both have a densely tuberculate carapace and strongly vaulted dorsal regions. Another extinct congener in the northeast Pacific region, Hyas tsuchidai Imaizumi, 1952, from the Upper Miocene Wakkanai Formation of northern Hokkaido, Japan. The earliest fossil record of the genus Hyas is from the ‘lower Badenian’ (Langhian, early Middle Miocene) of Austria. If Hyas originated in the Paratethys prior to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Spider crabs; New taxa; Pacific region; Palaeobiogeography; 42.74; 38.22. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/523857 |
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| Artal, P.; Bakel, B.W.M. van; Onetti, A.. |
| Marls assigned to the Coll de Malla Formation (Lutetian) in the area of Vic (Barcelona) and Sarrià de Ter (Girona) have yielded several specimens of a new brachyuran that can be assigned with confidence to the superfamily Majoidea. General carapace shape, the produced and bilobed front, with two longitudinal rounded ridges, the construction of the orbits, the gently arched posterior margin, as well as the strong conical protuberances in the dorsal regions, favour placement in the family Inachidae. The construction and distribution of the axial and branchial regions confirms assignment to the genus Planobranchia. Distinct features seen in the new material, such as the arched epibranchial ridges bounding the urogastric region, the gently arched posterior... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Spider crabs; Inachidae; Planobranchia; New taxon; Lutetian; 42.74; 38.22. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/523786 |
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| Tavares,Marcos; Santana,William. |
| Libinia spinosa H. Milne Edwards in Guérin, 1832 and L. ferreirae Brito Capello, 1871, inhabit very similar environments, and their geographic and bathymetric distributions overlap for about 3000 km along the southwestern Atlantic. Both species are commonly caught in the same haul and differentiating between them can often be difficult. Traditionally, morphological differentiation between L. spinosa and L. ferreirae has been based exclusively on the number of spines along the median, longitudinal line of the carapace and the development of a process at the anterolateral angle of the basal segment of the antenna. Because Libinia spinosa and L. ferreirae share similar numbers of median spines (7 and 6, respectively), and the number of median spines of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decapoda; Libinia gibbosa; Pisinae; Southwestern Atlantic; Spider crabs. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000600009 |
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