Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Energy allocation patterns during the reproductive cycle of echinoderms may be determined by the different energy requirements of the organisms. In this study, we describe the energy reserves variation in the gonads, pyloric caeca and stomach among the gametogenic stages of a population of Cosmasterias lurida from the Beagle Channel, Argentina. Adult individuals of C. lurida were collected from the subtidal zone of Ushuaia Bay during four seasonal sampling periods (August 2010 to June 2011). Indices, energy density (kJ/g ash-free dry mass) and energy content (kJ) of gonads, pyloric caeca and stomach were determined. Oocytes number and diameter were evaluated. Cosmasterias lurida had a major peak of gonadal index (GI) in mature gonads (M), with a great decrease towards the spawning (PS/PSR) and remature (RM) periods. No variation was observed in the energy density of the gonads (EDG). The energy content of the gonads (ECG) presented a similar pattern to the GI. Thus, the gonadal storage cycle can be explained through the variation in gonad mass more than in its energy density. Females had higher ECG and EDG values than males, which suggest a greater energy contribution in females during the reproductive cycle. The stomach and the pyloric caeca indices, energy density and energy content remained unaltered among the stages. The energy density of pyloric caeca (EDPC) was higher in mature males than in mature females. Likewise, the energy density of the stomach (EDS) was overall higher in males than in females. This inverse pattern between sexes in relation to the EDG may suggest a transference of energy from the pyloric caeca and stomach to gonads during maturate stage playing a storage role for reproduction. Rev. Biol. Trop. 65(Suppl. 1): S197-S206. Epub 2017 November 01. 

Between 1978 and 1982 the ruins of the Templo Mayor of Tenochtitlan were exhumed a few meters northward from the central plaza (Zócalo) of Mexico City. The temple was the center of the Mexica’s ritual life and one of the most famous ceremonial buildings of its time (15th and 16th centuries). More than 200 offerings have been recovered in the temple and surrounding buildings. We identified vestiges of 14 species of echinoderms (mostly as disarticulated plates). These include six species of sea stars (Luidia superba, Astropecten regalis, Astropecten duplicatus, Phataria unifascialis, Nidorellia armata, Pentaceraster cumingi), one ophiuroid species (Ophiothrix rudis), two species of sea urchins (Eucidaris thouarsii, Echinometra vanbrunti), four species of sand dollars (Mellita quinquiesperforata, Mellita notabilis, Encope laevis, Clypeaster speciosus) and one species of sea biscuit (Meoma ventricosa grandis). They date back to the reigns of kings Axayacatl (AD 1469-1481), Tizoc (AD 1481-1486), Ahuitzotl (AD 1486-1502), and Motecuhzoma II (AD 1502-1520). Apparently the presence of echinoderms in the offerings is related to the realm of Tlaloc (god of rain and earth). It is believed this organisms, like other marine animals, were used by the priests, like other marine animals, to represent the aquatic underworld of Mesoamerican world-view. Rev. Biol. Trop. 65(Suppl. 1): S168-S179. Epub 2017 November 01. 

Deep-sea echinoderms (Echinodermata: Echinoidea) from the Mexican Pacific. The coastal strip of the Mexican Pacific and Gulf of California includes 11 states, and considering Isla Guadalupe and the Revillagigedo archipelago, Mexico has 2 364 200 km2 of marine extension in the Pacific Ocean. Studies of deep benthic macroinvertebrates for this area began with the Albatross, which traveled from the Guadalupe Islands to Guaymas in 1891. To date, 26 species of echinoids have been reported, with a bathymetric range that exceeds 200 m. In the present work, the previous bibliographic records for echinoids that were collected within the limits of the Mexican Pacific were corroborated. The taxonomic identity of the 26 species reported was also corroborated by 11 689 specimens deposited in four scientific collections: two Mexican collections (3 322 specimens in the National Collection of Echinoderms “Dra. M. E. Caso” of the ICML, UNAM and 6 673 specimens deposited in the Invertebrate Reference Collection of the Mazatlán Station - ICML, UNAM) and two international collections (1 420 specimens deposited at the National Museum of Natural History, Smithsonian Institution, Washington, DC, and 140 specimens deposited at the Museum of Comparative Zoology, Harvard University). No collection records were found at depths greater than 200 m for the species Lytechinus pictus (Verrill, 1867), Clypeaster europacificus H.L. Clark, 1914, Dendraster excentricus (Eschscholtz, 1831), Lovenia cordiformis A. Agassiz, 1872 and Brissus obesus Verrill, 1867. No records were found for Kamptosoma asterias (A. Agassiz, 1881), Araeolampas fulva (A. Agassiz, 1879) and Nacospatangus depressus H.L. Clark, 1917, which belonged to specimens collected within the limits of the Mexican Pacific. Within the material examined in the scientific collections specimen records were found only for 18 of the 26 species of sea urchins that were collected at a depths greater than 200 m in the Mexican Pacific. No bibliographic record or specimens were found to validate geographic or bathymetric distribution for eight species. Rev. Biol. Trop. 65(Suppl. 1): S244-S252. Epub 2017 November 01.

The echinoderm Gogia granulosa (Echinodermata: Blastozoa) of early-mid Cambrian in Sonora, Mexico: paleoecology and paleogeography.Blastoids of Gogia granulosa Robison, 1965 and Gogia sp. have previously been reported from San Jose de Gracia, Sonora, Mexico. Here we report on the implications of their presence in limestone, shale, and sandstone from the lower-middle Cambrian of that site. The biotic association consists of blastoids, as well as trilobites (Onchocephalus, Bonnia, Bristolia, Olenellus), hyolithids (Hyolithes, Haplophrentis), sponges, algae and ichnofossils of echinoderms (Asteriacites, Asterosoma). The community suggests that the depositional environment was a carbonated platform of tropical, shallow sea, with well oxygenated water. The biota belonged to a large faunistic province that comprised parts of Canada, USA and Mexico (Panthalassic Ocean). Rev. Biol. Trop. 65(Suppl. 1): S160-S167. Epub 2017 November 01.

Morphometrics of echinoids in the Family Cassidulidae (Echinoidea: Cassiduloida). Cassidulidae is the type family of the order Cassiduloida, and contains five genera whose morphology has complicated their taxonomic study: Australanthus, Cassidulus, Eurhodia, Paralampas, and Rhyncholampas. Many authors have applied traditional morphometric analysis (mainly length, width, and height) with varying success. We present the first approach with geometric morphometrics (three outlines: aboral, left, and posterior). Genera Eurhodia and Paralampas are more varied than the others. For future studies, we recommend larger samples, and the inclusion of size and qualitative characters such as the ambulacra and peristome. Rev. Biol. Trop. 65(Suppl. 1): S233-S243. Epub 2017 November 01. 

Ophidiaster ludwigi had been reported only from Panama and Peru. Here we add record of the genus and species for Mexico and Costa Rica; and, first time its bathymetric distribution (0-156 m). Rev. Biol. Trop. 65(Suppl. 1): S253-S257. Epub 2017 November 01. 

Contiene los siguientes títulos:Nuevos registros de Berkeleya hyalina (Naviculales: Berkeleyaceae) para el Golfo de California, MéxicoDispersión de Hyalella azteca (Amphipoda: Hyalellidae) hacia VenezuelaNuevo registro de Leptocheirus rhizophorae (Amphipoda: Corophiidae) en el Golfo de MéxicoNew records of Alpheus saxidomus (Decapoda: Alpheidae) from tropical Pacific MexicoA new record of Cylindromyrmex striatus and range extension of C. brasilensis in Brazil (Hymenoptera: Formicidae)Albinismo en el burrito Haemulon sexfasciatus (Osteichthyes: Haemulidae), Baja California Sur, México

The species recorded in the present paper were collected during a parasitological survey of Peruvian marine teleost fishes from the Bay of Chorrillos (120 30' S, 760 50'W). Fish nomenclature has been based in Chirichigno (1974). The Copepoda specimens were deposited in the Zoological Collection of the Ricardo Palma University (Parasitology Laboratory, LPURP), Lima-Peru. Two of the species recorded, Bomolochus bellones and Naobranchia lizae are specific parasites of fishes (Belonidae, Mugilidae) widely distributed in the world. Other species, Caligus quadratus, parasitic on fishes of the families Carangidae, Coryphaenidae, Embiotocidae, Sciaenidae and Scombridae, has a large geographic range and low specificity. Lepeophtheirus edwarsi and Neobrachiella exilis bear a geographic range restricted to the South American Pacific and Japanese coast. The similarity of the copepod fauna parasitic on fishes from Peru and Chile is obvious because the presence of numerous fishes that inc1ude the Peruvian and Chilean coast in their geographic distribution (Chirichigno 1974).

The document shows new records of parasitic helminths in fish of the Peruvian Amazon.

Diversity, distribution patterns and hotspots of the irregular equinoids (Echinoidea: Irregularia) of Mexico.Irregular echinoids can be found in almost all marine habitats, from the polar to the equatorial regions, and from the intertidal zone to great depths; some species have a cosmopolitan distribution, but most are geographically restricted, and all live in very particular habitats to a greater or lesser degree in Mexico has 153 species distributed within the coastal limits. Geographic barriers (terrestrial barriers and large ocean basins) and ocean current patterns act as primary modulators of the distribution of echinoids; however, there are factors that define the local distribution. The purpose of this work is to analyze the diversity of irregular echinoids in Mexico, as well as to explain the patterns of distribution and to explore the hotspots through panbiogeography as units of high richness. The study area covers all the territorial waters of Mexico in the Pacific Ocean, Atlantic and Caribbean Sea. To obtain the geographical coordinates we used the distribution data of 68 species of irregular echinoids recorded at different depths. We reviewed the specimens deposited in five scientific collections, in addition to the revision of other records from online databases: 1. National Collection of Echinoderms “Ma. Elena Caso Muñoz” of the Instituto de Ciencias del Mar y Limnología (ICML), of the Universidad Nacional Autónoma de México (UNAM); 2. Regional Collection of Invertebrates of the Academic Unit Mazatlán, ICML, UNAM. 3. Invertebrate Zoology Collection, Smithsonian Museum of Natural History, Washington, D.C., United States of America, (USA); 4. Invertebrate Collection, Museum of Comparative Zoology, University of Harvard, Boston, Massachusetts; 5. Invertebrate Zoology, Peabody Museum, Yale University, New Haven, Connecticut; National Information System on Biodiversity (SNIB-CONABIO) and Global Biodiversity Information (GBIF). The generalized tracks were performed by the analysis of endemicity based on the optimization method, using the NDM/VNDM program with a 2° x 2° latitude/longitude grid. Hotspots were obtained by overlapping the generalized tracks using the ArcView program. The best represented was family Brissidae, with 15 species, most of them belonging to the genus Brissopsis, followed by the family Mellitidae (with 12 species), half of them belongs to the genus Encope. The families of irregular sea urchins with a smaller number of species were: Echinoneidae, Plexechinidae, Palaeotropidae and Paleopneustidae, each represented by a single species. The following general patterns of distribution were recognized: 1) groups of widely distributed species and 2) restricted species living in the first few meters of depth (0-20m). Nine consensus areas or generalized tracks were obtained in the Endemicity Analysis and 47 hotspots were recognized. Three areas with high specific wealth were obtained: West Coast of the Gulf of Mexico, Bank of Campeche/Mexican Caribbean and Gulf of California. The Gulf of California area has the highest diversity of irregular echinoids. This is the first approximation in the study of the panbiogeography of echinoderms of Mexico. Rev. Biol. Trop. 65(Suppl. 1): S42-S59. Epub 2017 November 01.