Papers by ricardo catalán
Bulletin of Marine Science, Jul 1, 2023
In the southeastern Pacific off Chile, coralliophilid snails have only been cited from offshore i... more In the southeastern Pacific off Chile, coralliophilid snails have only been cited from offshore islands at the Juan Fernández Archipelago and from Easter Island. In this work we describe a new coralliophilid species, Coralliophila ceciliae sp. nov., from shallow subtidal waters at a few locations in the Región de Atacama, northern Chile. This new species represents the first record for the subfamily Coralliophilinae, and for the genus Coralliophila, in the coasts of continental Chile. The new species differs from all other known eastern Pacific Coralliophila species in terms of shell shape, thickness, aperture color, and sculpture details, and it represents the first report of a coralliophilid species associated with actiniarians in the eastern Pacific. En el Pacífico suroriental frente a Chile, caracoles coralliophilidos solo han sido citados de islas oceánicas en el archipiélago de Juan Fernández y en la Isla de Pascua. En este trabajo describimos una nueva especie de coralliophilido, Coralliophila ceciliae sp. nov., de aguas submareales someras en algunas localidades de la Región de Atacama, norte de Chile. Esta nueva especie representa el primer registro para la subfamilia Coralliophilinae, y para el género Coralliophila, en las costas de Chile continental. La nueva especie difiere de todas las demás especies conocidas de Coralliophila del Pacífico oriental en cuanto a la forma y grosor de la concha, al color de la abertura y detalles de la escultura, y representa el primer informe de una especie coralliophilida asociada con actiniarios en el Pacífico oriental.
<i>Astyris atacamensis</i> new species Fig. 1 <b>Type material.</b> Holot... more <i>Astyris atacamensis</i> new species Fig. 1 <b>Type material.</b> Holotype: SBNHM 460092 (H: 10.6, D: 6.7 and LW: 8.3 mm); paratypes: SBNHM 460093 (1 specimen), MPCCL 0 1062016 (4 specimens), MZUC 37641 (4 specimens), MNHNCL 202493 (7 specimens); all from the type locality. <b>Type locality.</b> 20 km NW off Huasco (28°14'93'' S; 71°17'50'' W, 404–409 m), Región de Atacama, northern Chile. Leg. Ricardo Catalán, February 3, 2000. <b>Etymology.</b> The specific name of <i>Astyris atacamensis</i> refers to presence of this species on the continental shelf of the Región de Atacama, northern Chile. <b>Diagnosis.</b> Shell small (up to 11.1 mm long), thick, stout, with 4 to 5 rounded and slightly angulated whorls, often decollate; with sculpture of fine growth lines; spiral sculpture of very fine spiral grooves most noticeable on base of shell. Aperture wide, oval; outer lip sharp, in mature specimens with minute internal lirae; siphonal canal broad and straight. <b>Description.</b> Shell small (H 5.8 to 11.1 mm), thick, stout, with 4 to 5 weakly convex whorls; outline conic; sutures impressed. Measurements from fifty randomly chosen specimens: H 5.8–8.3– 11.1 mm, D 3.5–5.3– 7.1 mm, and height of last whorl 4.5–6.5– 8.7 mm (minimum–average–maximum). Taking into account that most of the shells had the first whorls eroded, we could observe at most 5 whorls in the better preserved shells, with a bit over 4 whorls remaining in most specimens. Colour pale tan; earlier whorls slightly paler, showing indistinct spiral bands. Spire short, decollate, about two-fifths of total height; spire angle a bit less than 45°. Protoconch and early whorls eroded. Teleoconch smooth and slightly glossy, except for fine, irregular axial growth lines crossed by spiral sculpture of very fine, barely visible grooves; grooves cover almost entire exterior surface, coarsest and most noticeable on base. Last whorl large, about three-fourths of shell height, slightly convex, angulated near the base, concave below; maximum width at about one third f [...]
FIGURE 2. Astyris permodesta (Dall, 1890). A–E. Holotype, USNM 96526, north of Santa Rosa Isl., C... more FIGURE 2. Astyris permodesta (Dall, 1890). A–E. Holotype, USNM 96526, north of Santa Rosa Isl., Channel Islands, California, USA, 276 fms [504.7 m], mud. F–G. SBMNH 356555, Santa Monica Basin, off California.
Terrestrial mollusca are sparsely studied in Chile and, for the first time, a formal record of th... more Terrestrial mollusca are sparsely studied in Chile and, for the first time, a formal record of the diversity of land snails in northern Chile is reported. Coastal and desertic areas in the Region of Atacama, in the border of the Atacama desert and the Pacific Ocean, were surveyed with the aim to describe the presence and distribution of this poorly known fauna. Of the fourteen species recorded, the geographic distribution records for nine species are extended, and some taxa are recorded for the first time since their original descriptions. All, except one, of the fourteen terrestrial molluscan species occurring in the area are endemic to Chile; they are all terrestrial species, most of them have a restricted geographic distribution, and none of them is currently protected by law. The results reveal that the region of Atacama has one of the most diverse terrestrial snail biodiversity in Chile, ranking only after the Juan Fernandez Archipelago. Distribution records of all the studied species and a taxonomic key are also provided.
Gayana (Concepción), 2016
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Papers by ricardo catalán