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Moluscos litorales (Bivalvia, Gastropoda, Polyplacophora, Cephalopoda) de playas rocosas de la región de Guaymas, golfo de California, México = Littoral mollusks (Bivalvia, Gastropoda, Polyplacophora, Cephalopoda) from rocky beaches in the area of Guaymas, Gulf of California, Mexico
Hendrickx, M.E.; Salgado-Barragán, J.; Cordero-Ruiz, M. (2019). Moluscos litorales (Bivalvia, Gastropoda, Polyplacophora, Cephalopoda) de playas rocosas de la región de Guaymas, golfo de California, México = Littoral mollusks (Bivalvia, Gastropoda, Polyplacophora, Cephalopoda) from rocky beaches in the area of Guaymas, Gulf of California, Mexico. Geomare Zoológica 1: 51-88
In: Geomare Zoológica. Geomare Investigacion Terrestre y Marina.
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Rocky intertidal; shells, communities; Mexican Pacific |
| Auteurs | | Top |
- Hendrickx, M.E.
- Salgado-Barragán, J.
- Cordero-Ruiz, M.
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| Abstract |
An intensive survey of mollusks associated with the rocky intertidal zone in seven beaches in the area of Guaymas, Sonora, Mexico, was undertaken in 1986 and 1997. A total of 113 species, 74 genera and 42 families was collected. All samples considered, the class of mollusks best represented was Gastropoda (66 species), followed by Bivalvia (30), Polyplacophora (14) and Cephalopoda (1). A total of 2,858 specimens were collected: Gastropoda, 2340; Bivalvia, 301; Polyplacophora, 203; Cephalopoda, 1. The beach with higher species richness was Algodones (53 species), followed by Caleta Lalo (52) and Punta Colorada (51). The other four beaches presented a much lower number of species: 18 in Bacochibampo, 16 in El Soldado, 20 in Piedras Pintas and only 5 in Sendero Viejo. Comparatively with other rocky beaches from the Mexican Pacific, where an average of 61 species have been collected in 41 localities, the richness observed in Guaymas is relatively high and is included within the seven areas with the highest number of recorded species. Twelve species accounted for at least 60 collected specimens. Among these species there was only one bivalve (Arcopsis solida; 98 specimens) and one chiton (Ischnochiton tridentatus; 102 specimens). Turbo fluctuosus was the species with the widest distribution and it was found in six localities, while four species were found in five localities. Of these, Tegula mariana was the most abundant. The known distribution range is increased for four species: Parvanachis pygmaea (G.B. Sowerby I, 1832), Pilsbryspira nymphia (Pilsbry & Lowe, 1932), Callistochiton colimensis (A.G. Smith, 1961), and Lepidozona crockeri (Willet in Hertlein & A.M. Strong, 1951). |
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