Holothuria (Cystipus) casoae una nueva especie de holoturia (Echinodermata: Holothuroidea) del Océano Pacífico oriental central.

Holothuria (Cystipus) casoae n. sp. is described from the central-eastern Pacific, from depths between 45 and 100 m. The main characters separating H. (C.) casoae from the rest of the species included in the subgenus Cystipus are the presence of a prominent fringe of 10 or more conical papillae along each side of the body and the presence of tables with a spinose rim, the pillars of the spire are short ending in a complex spiny crown with a small central circular opening. This new species is distinctive in the genus Holothuria, subgenus Cystipus, but shows some similarities to H. (C.) cubana Ludwig, 1875, H. (C.) inhabilis Selenka, 1867 and H. (C.) pseudofossor Deichmann, 1930.Holothuria (Cystipus) casoae n. sp. se describe para el Pacífico Central Este, a profundidades de 45-100 m. Los principales caracteres que separan a H. (C.) casoae del resto de las especies incluidas en el subgénero Cystipus son: la presencia de un margen lateral formado por 10 o más papilas cónicas a cada lado del cuerpo, y la presencia de espículas en forma de tablas con borde espinoso, con espiras de pilares cortos, terminando en una corona compleja de pequeñas espinas y con un agujero central. Esta nueva especie pertenece al género Holothuria, subgénero Cystipus, pero muestra algunas similitudes con sus congéneres H. (C.) cubana Ludwig, 1875, H. (C.) inhabilis Selenka, 1867 and H. (C.) pseudofossor Deichmann, 1930

Three new records of asteroids (Echinodermata: Asteroidea) from Peru

En el presente trabajo se registran 3 nuevos asteroideos (Echinodermata: Asteroidea) de aguas someras (4 - >50 m) para el Perú: Astropecten regalis Gray, 1840, Paulia horrida Gray 1840 y Meyenaster gelatinosus (Meyen, 1834). Astropecten regalis se conocía desde el Golfo de California hasta Panamá, en el presente trabajo, se amplía su distribución hasta Máncora, Perú. La distribución geográfica de Paulia horrida era conocida desde Baja California, hasta Isla Cocos, Costa Rica, en este estudio se amplía su distribución geográfica hasta Punta Sal, Perú. A Meyenaster gelatinosus se le conocía solo de Chile, en el presente trabajo se registra y confirma su presencia en el Perú, ampliando su distribución norte hasta San Juan de Marcona. Se proporciona información morfológica de las especies, características del hábitat y fotografías in situ y de los especímenes recién recolectados.The aim of this work is to present three new shallow water (4 - >50 m) records of asteroids (Echinodermata: Asteroidea) for the Peruvian fauna: Astropecten regalis Gray, 1840, Paulia horrida Gray 1840 and Meyenaster gelatinosus (Meyen, 1834). Astropecten regalis geographical distribution is known that ranges from Gulf of California to Panama, this discovery extends its distribution to Mancora, Peru. Paulia horrida is known from Baja California to Isla Cocos, Costa Rica, and this record extends its southern distribution limit to Punta Sal, Peru. Meyenaster gelatinosus was considered endemic to Chilean waters, however, this record confirm its presence in Peru extending its northern distribution limit to San Juan de Marcona, Peru. Morphological and habitat information on this four species is provided, together with live pictures

First report of Paelopatides (Synallactida, Synallactidae) for the SW Atlantic, with description of a new species from the deep-sea off Argentina

The present study describes a new species, Paelopatides shumel n. sp., from Argentinian deep-sea waters. This is the first report of the order Synallactida for Argentina, the fifth for southern hemisphere and the deepest report for the Argentinian holothuroid fauna (almost 3000 m). The species has up to 330 mm length, light brown color and around 19 pairs of dorsal appendages. The ventral side has one ventral ambulacra, with two rows of tube feet. Ossicles are present in dorsal appendages, tube feet, tentacles and body wall near the anus, and are mainly crosses, tables and rods-shaped. The depth at which P. shumel n. sp. has been found is occupied by the North Atlantic Deep Water current. This association with North Atlantic waters could be related with the occurrence of members of Paelopatides in the North Atlantic.Fil: Martinez, Mariano Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Solís Marín, Francisco A.. Universidad Nacional Autónoma de México; MéxicoFil: Penchaszadeh, Pablo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentin

Equinodermos de las Islas Lobos de Afuera (Lambayeque, Perú)

A rapid survey in Islas Lobos de Afuera (06°55,5 S - 80°42,5 W) were carry out from June 19 to 24 of 1999. A total of 39 Echinodermata species was collected: 7 Asteroidea, including two new records for Peru, Luidia bellonae, Luidia brevispina; 8 Ophiuroidea, whit one new record for Peru Ophionereis sp.; 11 Echinoidea, including five new records for Peru, Astropyga pulvinata, Diadema mexicanum, Lytechinus sp., Toxopneustes roseus, Tripneustes depressus; and 13 Holoturoidea, including six new records, Psolidium dorsipes, Cucumaria flamma, Pseudocnus californicus, Holothuria sp., Chiridota sp. and Actinopyga sp.Del 19 al 24 de junio de 1999 se llevó a cabo una expedición para realizar el inventario rápido de los equinodermos de las Islas Lobos de Afuera (06°55,5 S - 80°42,5 W). Se colectó un total de 39 especies de equinodermos: 7 asteroideos (2 nuevos registros para el Perú: Luidia bellonae, Luidia brevispina); 8 ofiuroideos (1 nuevo registro para el Perú: Ophionereis sp.); 11 equinoideos (5 nuevos registros para el Perú: Astropyga pulvinata, Diadema mexicanum, Lytechinus sp., Toxopneustes roseus, Tripneustes depressus) y 13 holoturoideos (6 nuevos registros: Psolidium dorsipes, Cucumaria flamma, Pseudocnus californicus, Holothuria sp., Chiridota sp. y Actinopyga sp.)

Discovery of adults linked to cloning oceanic starfish larvae (Oreaster, asteroidea: Echinodermata)

Two juvenile specimens of a new species of Oreaster were collected at Parque Nacional Arrecife Alacranes and Triángulos Oeste in the southern Gulf of Mexico. DNA of mitochondrial loci identifies them as members of the same clade as cloning larvae of Oreaster found abundantly in waters of the Florida Current-Gulf Stream system, and distinct from Oreaster clavatus and Oreaster reticulatus, the two known Oreasteridae species in the North Atlantic. Larvae from the new species of Oreaster persist as clones but also metamorphose and settle to the benthos with typical asteroid morphology. © 2019 The University of Chicago

A revision of Holothuria (Halodeima) kefersteinii (Selenka, 1867) and the revival of Holothuria inornata Semper, 1868 from sea cucumbers collected in Mexico and Central America

Honey-Escandón, Magali, Solís-Marín, Francisco A. (2018): A revision of Holothuria (Halodeima) kefersteinii (Selenka, 1867) and the revival of Holothuria inornata Semper, 1868 from sea cucumbers collected in Mexico and Central America. Zootaxa 4377 (2): 151-177, DOI: https://doi.org/10.11646/zootaxa.4377.2.

Abditoporella Sosa-Yanez, Vieira & Solis-Marin

Genus <i>Abditoporella</i> Sosa-Yañez, Vieira & Solís-Marín n. gen. <p> <b>Type species.</b> <i>Abditoporella dimorpha</i> n. sp.</p> <p> <b>Diagnosis.</b> Colony encrusting, uni- to multilaminar. Zooids polygonal; frontal shield with scattered frontal pseudopores. Orifice cleithridiate (keyhole-shaped) with lateral condyles. Oral spines absent. Avicularia adventitious or interzooidal. Embryos brooded endozooidally in female zooids. Interzooidal communications via septular pores.</p> <p> <b>Etymology</b>. From Latin <i>abditus</i>, hidden, and - <i>porella</i>, a common suffix for Bryozoa, alluding to the inconspicuous ooecium.</p> <p> <b>Remarks.</b> This new genus is distinguished from other Hippoporidridae in having both a pseudoporous frontal shield and endozooidal ovicells. These morphological characteristics lead us to include another species previously assigned to <i>Hippopodinella</i>, as <i>Abditoporella turrita</i> (Osburn, 1952) <b>n. comb.</b> Female zooids are dimorphic in <i>A. dimorpha</i> <b>n. sp.</b>, but skeletal dimorphism is not evident in <i>A. turrita</i> (Osburn 1952).</p> <p> <i>Abditoporella</i> <b>n. gen.</b> shares some of the morphological features of both <i>Odontoporella</i> and <i>Hagiosynodos</i>. <i>Odontoporella</i> has a similar orifice, avicularia and internally buttressed recesses for communication pores (see Gordon 1989), but is distinguished from <i>Abditoporella</i> <b>n. gen.</b> in having a non-pseudoporous frontal shield with radial ridges and associated areolar pores, and no externally distinguishable zooidal sexual dimorphism (Carter & Gordon 2007). The campanulate orifice and the pseudoporous frontal shield of <i>Abditoporella</i> resemble that in the cheiloporinid genus <i>Hagiosynodos</i> (Bishop & Hayward 1989; Hayward & McKinney 2002), but this genus has conspicuous ooecia closed by the zooidal operculum. Although avicularia were not noted in <i>Hagiosynodos</i> by Hayward & McKinney (2002), they are present in the genus (Bishop & Hayward 1989). The combined morphological similarities among <i>Abditoporella</i> <b>n. gen</b>., <i>Hagiosynodos</i> and <i>Odontoporella</i> lead us to accommodate these genera in the same family, Hippoporidridae.</p>Published as part of <i>Sosa-Yañez, Armando, Vieira, Leandro M. & Solís-Marín, Francisco A., 2015, A new cheilostome bryozoan genus, Abditoporella (Hippoporidridae), from the eastern Pacific, pp. 275-282 in Zootaxa 3994 (2)</i> on page 276, DOI: 10.11646/zootaxa.3994.2.7, <a href="http://zenodo.org/record/232039">http://zenodo.org/record/232039</a&gt

A new cheilostome bryozoan genus, Abditoporella (Hippoporidridae), from the eastern Pacific

Sosa-Yañez, Armando, Vieira, Leandro M., Solís-Marín, Francisco A. (2015): A new cheilostome bryozoan genus, Abditoporella (Hippoporidridae), from the eastern Pacific. Zootaxa 3994 (2): 275-282, DOI: http://dx.doi.org/10.11646/zootaxa.3994.2.

Selenkothuria Deichmann 1958

Subgenus Selenkothuria Deichmann, 1958 Diagnosis (after Deichmann, 1958): Soft-skinned forms with numerous cylindrical feet, forming a distinct ventral sole, sometimes arranged in three broad bands; dorsally numerous minute papillae, not conspicuous, rarely forming low warts. Tentacles more or less terminal in position, often bushy, adapted for plankton catching. Inner anatomy not remarkable; certain species with numerous stone canals in one or two tufts on both sides of the dorsal mesenterium, others with a single large one attached to the right side; usually one Polian vesicle; gonads as divided threads in a tuft behind the low calcareous ring; Cuverian organs present in some forms. An external layer of tables usually completely lacking, though vestiges of tables sometimes found in young individuals of certain species. The inner layer consisting of small rods or plates, smooth or spinous. Ventral feet with large end plate and walls supported by rods or plates of same size as those in the skin, rarely special supporting rods or perforated plates present. Dorsal appendages with reduced end plate or none, and often more curved, shorter rods. In some species, rods present in the cloacal retractor muscles and in the respiratory trees. Color dull gray, dark brown, olive green or black with or without two rows of dark spots and darker anterior and posterior end. Type species: Holothuria lubrica Selenka, 1867.Published as part of Honey-Escandón, Magali, Solís-Marín, Francisco A. & Laguarda-Figueras, Alfredo, 2011, Holothuria (Selenkothuria) carere, a new species of sea cucumber (Echinodermata: Holothuroidea) from the Mexican Pacific, pp. 27-33 in Zootaxa 2922 on pages 28-29, DOI: 10.5281/zenodo.20242

The Aerolito de Paraiso – anchialine system: paradise for echinoderms

The anchialine cave Aerolito de Paraiso is located in Cozumel Island, Mexico. It is unique because it is mainly inhabited by four classes of echinoderms. After reviewing all of the material collected for this location, we present a taxonomic list composed of 22 species of echinoderms. Ophiuroidea is the best represented class in the anchialine cave with 11 species