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Inventario de Biodiversidad de la costa sur de Jalisco y Colima

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Key list of macroalgae, dinoflagelate, meduzosoa, eufausiids, amphipods, copepods, cephalopods and polichaeta.
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... Lestrigonus bengalensis and Phronimopsis spinifera were found only in Transect A stations, where SASW predominated superficially, characterized by low temperatures and salinities (Moraga & Argandoña 2008). These species have been recorded for circumtropical waters, preferably neritic and wide distribution (Stuck et al. 1980, Zeidler 1992, Gasca & Shih 2001, Gasca 2009, Gasca & Morales-Ramírez 2012, Valencia et al. 2013, Gasca & Franco-Gordo 2013. ...
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The composition, distribution, and abundance of hyperiid amphipods collected in the oceanographic cruise between the central coast and oceanic islands of Chile in the southeastern Pacific were analyzed. Thirty-four genera and 54 species were identified, grouped into two infraorders and 16 families. The presence of Hemityphis tenuimanus Claus 1879, and Laxohyperia vespuliformis Vinogradov & Volkov 1982, expands its geographical distribution as new records for the southeastern Pacific. According to the founded species, spatial distribution, and the bodies of water present in the study area, Chile’s central region would be a transition zone for species originating from the Magellan Province (Subantarctic water) and the Peru-Chile Province (Subtropical water).
... El complejo Stomolophus meleagris tiene distribución anfiaméricana. En el Pacífico Mexicano, incluye el Golfo de California, Sinaloa y Sonora, Colima, Jalisco y Oaxaca (Alvariño, 1999;Ocaña-Luna and Gómez-Aguirre, 1999;Jáquez-Bermúdez et al., 2013;Gómez Daglio and Dawson, 2017). ...
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During routine fieldwork in September 2019 in Acapulco Bay, Mexico, four jellyfish specimens belonging to the species Chiropsalmus alipes (Cubozoa) and Stomolophus cf. meleagris (Scyphozoa); were collected for the first time thus extending its distribution range to the south Mexican Pacific. Both species are of interest, the first species given its high toxicity and, the second one is commercial exploitation for human consumption.
... Most studies of cephalopods in the Mexican Pacific have focused on commercial species like the benthic Octopus hubbsorum Berry, 1953 (Alejo-Plata andGómez-Márquez 2015), the pelagic Loliguncula panamensis Berry, 1911(Arizmendi-Rodríguez et al. 2012 and the giant squid Dosidicus gigas (d'Orbigny, 1835) (Gilly et al. 2006). General information on species richness (e.g., lists of species, records for specific areas) is scattered in a rather limited number of documents (e.g., Hendrickx and Brusca 2005;De Silva-Dávila et al. 2013;Alejo-Plata et al. 2014;Urbano et al. 2014). Specific information on western Mexico deep-sea cephalopods is available in reports by Young (1972) and McClatchie (2014 and references therein), mostly pertaining to the area off the west coast of the Baja California Peninsula, in waters under the influence of the California Current. ...
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Deep-sea cephalopods are still poorly studied worldwide. In the case of the Mexican Pacific there is a general lack of basic information concerning their distribution and biology. A series of 132 specimens of pelagic and benthic deep-water cephalopods was obtained during the TALUD project. Samples were mostly obtained with benthic sampling gear that operated as mid-water trawls during the ascent of the nets. Micronekton and Isaacs-Kidd samplers were also occasionally used. The specimens (77 lots in total) were obtained at localities off western Mexico at depths between 122 m and 2200 m and belong to 31 species. Considering material identified to species level only, a total of 13 species were found only at a single station, while five others occurred in 5–6 stations (i.e., Leachia dislocata, Abraliopsis [Pfefferiteuthis] falco, Pterygioteuthis giardi, P. holeyi and Benthoctopus robustus). The most widespread species was Japetella diaphana, collected in 11 stations. Twenty-two of the 31 species are strictly pelagic, eight strictly benthic and one is benthopelagic. Significant new distribution records were obtained for seven species: Doryteuthis opalescens, Gonatus berryi, Todarodes pacificus, Opistoteuthis californiana, Benthoctopus leioderma, B. robustus and Graneledone boreopacifica.
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This essay attempts to summarize and hypothetically reconstruct the original condition for there productive strategy and hatching mechanisms of the family Euphausiidae (Order Euphausiacea). Comparison is made of the hatching mechanisms and hatching success rates among five broad cast-spawning ( Euphausia pacifica, Euphausia eximia, Euphausia distinguenda, Thysanoes saspinifera, and Thysanoessa inspinata) and two sac-spawning euphausiid species ( Nematoscelis difficilis and Nyctiphanes simplex) collected from the Oregon coast, Bahía Magdalena (west coast of Baja California peninsula), and Gulf of California. These along with the discovery of a novel source of embryomortality during hatching for broad cast-spawning species, and recently published genetic and phylogenetic information of the euphausiids, support the hypothesis that hatching as a free-living nauplius is a reversed character within the Order Euphausiacea in comparison with species be longing to ot her orders in the Class Crustacea. The hatching of embryosat nauplius stage, with distinct hatching mechanisms, appears repeatedly and intermittently in the Euphausiidae family phylogeny both in euphausiids with broad cast and sac-spawning reproductive strategy.This may represent a condition reemerging well back in crustacean phylogeny, even though it is not necessarily primitive among the Order Euphausiacea as a whole. Mecanismos de eclosión y muerte de embriones de eufáusidos durante el proceso de eclosión ¿Son éstas evidencias que expliquen una reversión evolutiva de nauplios de vida libre? En este ensayo se intenta resumir y reconstruir la condición hipotética original de las estrategias de reproducción y mecanismos de eclosión de la Familia Euphausiidae (Orden Euphausiacea). Se hace la comparación de los mecanismos y tasas de éxito de eclosión de cinco especies desovadoras externas (Euphausia pacifica, Euphausia eximia, Euphausia distinguenda, Thysanoessa spinifera y Thysanoessa inspinata) y dos especies desovadoras en saco ovígero (Nematoscelis difficilis y Nyctiphanes simplex) de la costa de Oregon, Bahía Magdalena en la costa oeste de la península de Baja California, y Golfo de California. Esto, junto con el descubrimiento de mortalidad asociada al proceso de eclosión en especies con desove externo y la reciente información publicada sobre genética y filogenética de los eufáusidos, apoyan la hipótesis de que la eclosión de nauplios de vida libre es una característica revertida dentro del Orden Euphausiacea, en comparación con especies de otros órdenes dentro de la clase Crustácea. La eclosión de los embriones en el estadío nauplio, con distintos mecanismos de eclosión, aparece intermi tentemente a lo largo de la filogenia de las especies de la Familia Euphausiidae, tanto en especies desovadoras externas como en desovadoras ensaco ovígero. Esta eclosión en estadio nauplio aparentemente representa una condición reemergente de antepasados en la filogenia de crustáceos, y por lo tanto, no es necesariamente una condición primitiva entre las especies de la Orden Euphausiacea.
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Some flabelligerid bodies are modified into a thick thorax and a long, thinner abdomen, or cauda; the thorax usually hassome sediment particles cemented forming a dorsal shield, and these flabelligerids have been found boring into consoli-dated sediments or calcareous substrates. Two species, Pherusa inflata (Treadwell, 1914) and P. parmata (Grube, 1877),are frequently recorded from many different environmental conditions and localities. The study of all type or non-typematerials of similar flabelligerids had several results: 1) The species with bodies modified into thorax and cauda, usuallycarrying a dorsal shield, are removed from Pherusa Oken, 1807; 2) Two body patterns are recognized on the basis of thetype of neurochaetae in transitional chaetigers (3–5), and on the development of the caudae; 3) Semiodera Chamberlin,1919 is redefined to include species with a dorsal shield variously developed, pseudocompound transitional chaetae, andcaudae usually cylindrical with few neurohooks; 4) Daylithos n. gen., includes species with well-developed dorsal shield,multiarticulate or aristate transitional neurochaetae, and caudae usually depressed with few to many neurohooks; 5) Semi-odera includes Semiodera caribea (Grube & Ørsted in Grube, 1859) new spelling, n. comb. (type species), S. blakei n.sp., S. curviseta (Caullery, 1944) n. comb., S. dubia (Treadwell, 1929) n. comb., S. glynni n. sp., S. inflata (Treadwell,1914) n. comb., S. laevis (Stimpson, 1856) n. comb., S. mezianei n. sp., S. nishii n. sp., S. salazarae n. sp., S. tenera(Grube, 1868) n. comb., S. tovarae n. sp., S. treadwelli n. sp. and S. villalobosi n. sp.; 6), Daylithos n. gen. includes Day-lithos parmatus Grube, 1878 n. comb. (type species), D. amorae n. sp., D. cinctus (Haswell, 1892) n. comb., D. dieteri n. sp., D. iris (Michaelsen, 1892) n. comb., and D. nudus (Caullery, 1944) n. comb.