ABSTRACT
Lepidochitona bullocki, a new species of chiton (Polyplacophora: Ischnochitonidae) from the Colombian Caribbean. The genus Lepidochitona is one of the most diverse in the Southern Caribbean. In order to describe this new species, twenty specimens of L. bullocki sp. nov. were collected by hand on the rocky coast, from 0.25 to 1.5m depth, and a shore distance of 1 to 5m, between the Northern section of Rodadero beach and Puerto Luz, in Santa Marta, Colombia. The specimens were small, with maximum observed size of 7.3mm. This is the fourth species of the genus Lepidochitona described for the Caribbean. The previously known species were L. liozonis (Dall & Simpson 1901), L. rosea (Kaas 1972) and L. rufoi (García-Ríos 2010). L. bullocki differs from L. liozonis and L. rosea in having a rough tegmentum and color. It differs from L. rufoi in having longer and numerous hyaline spicules, bigger size and broader central radula tooth. Lepidochitona bullocki is the only Caribbean species of the genus frequently located on the illuminated side of rocks in the shallow sublitoral zone. Rev. Biol. Trop. 59 (3): 1105-1114. Epub 2011 September 01.
El género Lepidochitona (Gray 1821) se encuentra representado en el Caribe por tres especies: L. liozonis (Dall & Simpson 1901), L. rosea (Kaas 1972) y L. rufoi. Veinte ejemplares de L. bullocki sp. nov. Fueron recolectados en un recorrido a lo largo del litoral rocoso, entre el norte de la playa del Rodadero y Puerto Luz, en Santa Marta, Colombia. Los ejemplares son pequeños, hasta 7.3mm, fueron recolectados a mano, entre 0.25 y 1.5m de profundidad, a distancias entre 1 y 5m de la orilla. Esta es la cuarta especie del género que se describe para el Caribe. Las tres especies previamente descritas son L. liozonis (Dall & Simpson, 1901), L. rosea Kaas, 1972 y L. rufoi García-Ríos, 2010. L. bullocki se diferencia de L. liozonis y L. rosea por tener la superficie del tegumento irregular y de otros colores. La misma se distingue de L. rufoi por tener muchas espículas hialinas largas, mayor tamaño, dientes centrales de la rádula anchos. Es la única especie del género en el Caribe que se localiza con mayor frecuencia en la superficie iluminada de las rocas, en el sublitoral somero.
Subject(s)
Animals , Polyplacophora/anatomy & histology , Polyplacophora/classification , Caribbean Region , ColombiaABSTRACT
Diversity and microstructure of quitons (Mollusca: Polyplacophora) from the Caribbean of Costa Rica. The polyplacophorans of the coral reef on the Caribbean coast of Costa Rica have been insufficiently studied. The examination of coral rubble accumulated in the shallow sublitoral waters on four collection stations in Provincia Limón revealed a higher diversity of chitons than was documented. From the country eight species were previously known: Ischnochiton erythronotus (C.B. Adams 1845); Ischnoplax pectinata (Sowerby 1840); Stenoplax boogii (Haddon 1886); S. purpurascens (C.B. Adams 1845); Acanthopleura granulate (Gmelin 1791); Chiton marmoratus Gmelin 1791; C. tuberculatus Linnaeus 1758 and Acanthochitona rhodea (Pilsbry 1893). This study added five more species that are reported here for the first time: Callistochiton portobelensis Ferreira 1976; Ischnochiton kaasi Ferreira 1987; I. pseudovirgatus Kaas 1972; Acanthochitona balesae Abbott 1954 and Cryptoconchus floridanus (Dall 1889). Rev. Biol. Trop. 59 (1): 129-136. Epub 2011 March 01.
Los poliplacóforos asociados a los arrecifes de coral en la costa caribeña de Costa Rica han sido poco estudiados. El examen del cascajo de coral acumulado en el sublitoral somero, en cuatro estaciones de colección, localizadas en la Provincia de Limón reveló una diversidad de quitones mayor a la documentada. Anteriormente se habían registrado ocho especies para el Caribe costaricense: Ischnochiton erythronotus (C.B. Adams, 1845); Ischnoplax pectinata (Sowerby 1840); Stenoplax boogii (Haddon, 1886); S. purpurascens (C.B. Adams, 1845); Acanthopleura granulata (Gmelin, 1791); Chiton marmoratus Gmelin, 1791; C. tuberculatus Linnaeus, 1758; Acanthochitona rhodea (Pilsbry, 1893). Otras cinco se registran aquí por primera vez: Callistochiton portobelensis Ferreira 1976; Ischnochiton kaasi Ferreira 1987; I. pseudovirgatus Kaas 1972; Acanthochitona balesae Abbott 1954; Cryptoconchus floridanus (Dall 1889).
Subject(s)
Animals , Biodiversity , Polyplacophora/classification , Polyplacophora/ultrastructure , Costa Rica , Microscopy, Electron, Scanning , Population DensityABSTRACT
A new species of the chiton Lepidochitona (Polyplacophora: Ischnochitonidae) from Puerto Rico. The genus Lepidochitona Gray, 1821 has two species in the Caribbean: L. liozonis (Dall & Simpson, 1901) and L. rosea Kaas, 1972. We describe a third species: Lepidochitona rufoi sp. nov. from Puerto Rico. Lepidochitona rufoi differs from both in having a finely granulose tegmentum, smaller size, a very fine central radula tooth, and different anal plate form and color pattern. It also differs from L. liozonis in having longer marginal spicules. Rev. Biol. Trop. 58 (2): 635-644. Epub 2010 June 02.
El género Lepidochitona Gray, 1821 tiene dos especies en el Caribe: L. liozonis (Dall & Simpson, 1901) y L. rosea Kaas, 1972. Se describe una tercera especie: Lepidochitona rufoi sp. nov. de Puerto Rico. Lepidochitona rufoi difiere de ambas por tener un tegumento finamente granuloso, menor tamaño, una rádula con dientes centrales muy finos, la forma de la valva anal y el color diferentes. También difiere de L. liozonis por tener espículas marginales más largas.
Subject(s)
Animals , Polyplacophora/anatomy & histology , Polyplacophora/classification , Puerto RicoABSTRACT
Eight species of polyplacophorans have been reported from La Bahia de la Paz, Baja California Sur, Mexico. We add Lepidochitona beanii, Chaetopleura lurida, Stenoplax limaciformis, S. mariposa, Lepidozona clathrata, L. serrata and Acanthochitona arragonites, increasing the known number of species to 15. Ordination analysis of five chiton communities at the site suggests a correlation of wave exposure to species composition and diversity: communities with intermediate wave exposure have more species (richness) and higher diversity (Shannon's index).
Subject(s)
Animals , Polyplacophora/classification , Population Density , Species Specificity , MexicoABSTRACT
Collections of 11 species of shallow water Polyplacophora from El Salvador were made in July 2002. Previously only five species had been documented in El Salvador: Chaetopleura lurida (Sowerby, 1832); Ischnochiton guatemalensis (Thiele, 1910); Ceratozona angusta (Thiele, 1909); Chiton stokesii (Broderip, 1832) and Acantochitona exquisita (Pilsbry, 1893). Of these, L. guatemalensis and A. exquisita were not collected in this census. Seven other species are reported here for El Salvador for the first time: Lepidochitona beanii (Carpenter, 1857); Ischnochiton dispar (Sowerby, 1832); Stenoplax limaciformis (Sowerby, 1832); Callistochiton expressus (Carpenter, 1865); Acanthochitona arragonites (Carpenter, 1867); A. ferreirai (Lyons, 1988) and A. hirudiniformis (Sowerby, 1832). The known geographic distribution of 1. dispar is extended to the north. An un-named species of Lepidochitona is briefly described.
Subject(s)
Animals , Polyplacophora/classification , El Salvador , GeographyABSTRACT
Callistochiton edwini n. sp. (Callistoplacidae Pilsbry, 1893) a new species from the continental platform of Pernambuco, Brazil, South America is described and illustrated. Identification may be made by characteristic morphological aspect of shell and elements of girdle, which are peculiar to this species.