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17 resultados encontrados para: AUTOR: Iliffe, Thomas M.
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1.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

Surveys of the anchialine crustacean fauna of the Yucatan Peninsula (YP), Mexico, have revealed the occurrence of calanoid copepods. The genus Stephos Scott, 1892, belonging to the family Stephidae is among the most frequent and widely distributed groups in anchialine caves but has not been hitherto recorded from the YP. Recent collections from an anchialine cave in an island off the northern coast of the YP yielded many specimens of a new species of Stephos. The new taxon, S. fernandoi sp. n., is described here based on male and female specimens. The new species is clearly distinguished from its congeners by the following characters: male left fifth leg with three terminal lamellae plus subdistal process, right leg with distal row of peg-like elements; female fifth leg with single long, acute apical process; genital double-somite with two rows each of 4 long spinules adjacent to operculum; legs 2-4 with articulated setae. The diversity of the genus shows regional differences; the Australia-Western Pacific region is the most diverse (eleven species), followed by the Mediterranean (seven species) and the Northeastern Atlantic (six species); only four species are known from the Northwestern Tropical Atlantic (NWTA). The morphology of the female fifth leg was examined to explore possible biogeographic trends in the genus; patterns suggest multiple colonization events in the highly diverse regions and a relatively recent radiation in the NWTA, characterized by anchialine forms. The introduction of stephid copepods in the region may be a relatively recent event derived from colonization of benthopelagic ancestral forms and subsequent invasion onto cave habitats. The new species appears to be linked to the strictly anchialine Miostephos.


2.
- Artículo con arbitraje
A new Speleophria (Copepoda, Misophrioida) from an anchialine cave of the Yucatán Peninsula with comments on the biogeography of the genus
Suárez Morales, Eduardo ; Cervantes Martínez, Adrián (coaut.) ; Gutiérrez Aguirre, Martha Angélica (coaut.) ; Iliffe, Thomas M. (coaut.) ;
Contenido en: Bulletin of Marine Science Vol. 93, no. 3 (July 2017), p. 863-878 ISSN: 0007-4977
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Resumen en inglés

Misophrioid copepods are hyperbenthic or anchialine forms whose known distributional patterns appear to have a Tethyan origin and subsequent vicariant processes. A new misophrioid copepod, Speleophria germanyanezi n. sp., collected from an anchialine cave in Cozumel Island, Yucatán Peninsula (YP), is described based on male and female specimens. This is the second report describing a misophrioid copepod species from the Yucatán Peninsula, harboring a remarkably diverse anchialine crustacean fauna. The new species is the sixth of this anchialine genus. It differs from its congeners by a combination of characters including: the armature of leg 4 exopod, 21-segmented female antennule, 24-segmented male antennule, both with moderate proximal expansion, the male with the terminal antennulary segments distinctively elongate. The fifth leg distal segment is armed with 3 elements in the female, 4 in the male. The female genital double-somite is furnished with long, slender spinules. The other members of Speleophria are distributed in Europe (Croatia, Spain), Bermuda, and Australia. Relationships among species of Speleophria have revealed amphiatlantic pairs of sister taxa. The new species has little affinity with its regionally closest congener from Bermuda; it appears to be most closely related to the Croatian S. mestrovi and could be its western Atlantic counterpart. The different misophrioid fauna between the YP and Cozumel Island and the more recent emergence of Cozumel with respect to that of the YP plate suggests either an ancestral Tethyan-related independent colonization or a relatively recent local dispersal through deep-sea crevicular habitats before emergence of these land masses.


3.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

A new genus and species of speleophriid copepod, Mexicophria cenoticola gen. et sp. nov., is described based on material collected from a cenote in the Yucatan Peninsula of Mexico. It is characterised by relatively reduced fifth legs that are located adjacent to the ventral midline in both sexes, by the possession of a bulbous swelling on the first antennulary segment in both sexes, and by the reduced setation of the swimming legs. The presence of just one inner margin seta on the second endopodal segment of legs 2 to 4 is a unique feature for the family. A phylogenetic analysis places the new genus on a basal lineage of the family together with its sister taxon, Boxshallia Huys, 1988, from Lanzarote in the Canary Islands, and recovers the existing genera as monophyletic units. The zoogeography is discussed at local, regional, ocean basin and global scales.


4.
- Artículo con arbitraje
Conservation status of the inland aquatic crustaceans in the Yucatan Peninsula, Mexico: shortcomings of a protection strategy
Mercado Salas, Nancy Fabiola ; Morales Vela, José Benjamín (coaut.) ; Suárez Morales, Eduardo (coaut.) ; Iliffe, Thomas M. (coaut.) ;
Contenido en: Aquatic Conservation: Marine and Freshwater Ecosystems Vol. 23, no. 6 (December 2013), p. 939-951 ISSN: 1099-0755
Resumen en: Inglés |
Resumen en inglés

1. The Yucatan Peninsula (YP), Mexico, is a large karstic Neotropical system hosting a highly diverse crustacean fauna related to epigean and subterranean aquatic habitats. There are more than 40 hypogean endemic species, thus qualifying as a subterranean biodiversity hotspot. 2. In view of the relevance of both the YP karstic aquifer and its related crustacean fauna, the spatial distribution of 212 species from 1165 geo-referenced records of the inland aquatic crustaceans were analysed in relation to the geographic coverage of protected natural areas (PNAs) of the YP. The data analysed were obtained from sources including the authors’ own observations, published literature, and institutional and government databases. 3. The YP is an area with a high biodiversity of continental crustaceans and is also an important area of endemism worldwide. However, most of the crustacean fauna is at risk. Only 18.5% of the crustacean species recorded in the YP and only 3.2% of the endemic forms are distributed within the limits of a protected area. In addition, only five of the 48 endemic species are listed in the Mexican Official Standard (NOM-059-2010) and none of them occurs in a protected area. 4. The groups with the highest endemism are the Remipedia and Ostracoda, each with two known YP endemic species. Peracarids are also highly endemic in the YP (62%), followed by Copepoda (27%), Decapoda (18%), and Branchiopoda (1.5%). 5. Currently, the areas of most concern, owing to high tourist pressures, are the ‘Corridor Tulum - Puerto Morelos’ and the ‘Ring of Cenotes’, both having significant numbers of endemic forms. A revision of the PNAs’ management programmes to incorporate aquatic ecosystems and biota, the expansion of selected PNAs to provide protection to critical unprotected areas, and increased research activities focused on the aquatic fauna are recommended actions.


5.
Artículo
A new genus of speleophriid copepod (Copepoda: Misophrioida: Speleophriidae) from a cenote in the Yucatan, Mexico
Boxshall, Geoff A. ; Jaume, Damiá (coaut.) ; Iliffe, Thomas M. (coaut.) ; Suárez Morales, Eduardo (coaut.) ;
Contenido en: Natura Croatica Supl. 1, Vol. 21, no. 1954 (September, 2012), p. 12-14 ISSN: 1330-0520

6.
Artículo
*En hemeroteca, SIBE-Chetumal
Phylogeny and historical biogeography of the cave-adapted shrimp genus Typhlatya (Atyidae) in the Caribbean Sea and western Atlantic
Hunter, Rebecca L. (coaut.) ; Webb, Michael Scott (coaut.) ; Iliffe, Thomas M. (coaut.) ; Alvarado Bremer, Jaime R. (coaut.) ;
Contenido en: Journal of Biogeography Vol. 35, no. 1 (Enero 2008), p. 65-75 ISSN: 0305-0270
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
48660-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal

7.
- Artículo con arbitraje
A new genus of ridgewayiidae (Copepoda: calanoida) from a karstic cave of the western caribbean
Suárez Morales, Eduardo ; Iliffe, Thomas M. (coaut.) ;
Clasificación: AR/595.34 / S9/7
Contenido en: Journal of Crustacean Biology Vol. 27, no. 2 (April 2007), p. 339-350 ISSN: 0278-0372
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
ECO030006667 (Disponible)
Disponibles para prestamo: 1
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The calanoid copepod family Ridgewayiidae, containing demersal and cave-dwelling forms, has representatives worldwide, but most have been known from the Northwestern Tropical Atlantic. Eight valid genera were hitherto known, most of them were described recently (Ridgewayia Thompson and Scott, Exumella Fosshagen, Brattstromia Fosshagen and Iliffe, Placocalanus Ohtsuka, Fosshagen and Soh, Exumellina Fosshagen and Iliffe, Normancavia Fosshagen and Iliffe, Robpalmeria Fosshagen and Iliffe, Stargatia Fosshagen and Iliffe). Biological collections in cave environments in an island off the Caribbean coastline of Honduras, Central America, showed the presence of ridgewayiid copepods. These specimens were found to belong to an undescribed genus of the family. The new genus Hondurella is distinguished from the other eight known ridgewayiid genera by a combination of characters that include a simple rostrum with no filaments, maxilliped with modified setae, first leg with a modified exopod and a reduced endopodal armature, and most importantly, a female fifth leg with a slightly modified exopod and a 1-segmented endopod, plus a reduced right exopod of the male fifth leg, and the presence of spines on the middle segments of the male right antennule. As all other ridgewayiids, the new genus retains several plesiomorphic characters, thus confirming the primitive profile of this family. The distribution of Ridgewayiidae in the Caribbean region remains largely unknown, but it is suggested that distributional patterns and a relatively high degree of endemism are related to the geological origin and dynamics of the area. Aside the modified maxillipedal setae, mouthparts in the new genus,are normally developed; this, together with our observations of the gut contents, suggest that this ridgewayiid is more a particle-feeder than a carnivorous form.


8.
- Artículo con arbitraje
A new epacteriscid copepod (Calanoida: epacteriscidae) from the Yucatan Peninsula, Mexico, with comments on the biogeography of the family
Suárez Morales, Eduardo ; Ferrari, Frank D. (coaut.) ; Iliffe, Thomas M. (coaut.) ;
Clasificación: AR/595.34 / S9/5
Contenido en: Proceedings of the Biological Society of Washington Vol. 119, no. 2 (2006), p. 222-238 ISSN: 0006-324X
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
ECO030005372 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

The calanoid copepod family Epacteriscidae is represented by species from tropical marine and anchiahne environments. Surveys of the anchialine invertebrate fauna of the Yucatan Peninsula. Mexico, have resulted in a number of interesting records of crustaceans during the last decade, but no records of Epacteriscidae. However, recent collections from hypogean environments of the Yucatan have yielded specimens of a new species of the previously monotypic genus Balinella. The specimens were included in this genus by having three outer spines on the third exopodal segment of legs 3 and 4, a biramous mandibular palp, and an antennal endopod longer than the exopod, among other characters. The new species, B. yucatanensLs, is described on the basis of male and female specimens collected in caves associated with three different karstic sinkholes. The new species is distinguished from its only known congener. B. ornate/ Fosshagen, Boxshall and Iliffe, 2001. by the strong asymmetry of the caudal rami in females, a modified left fifth leg of the male in which the proximal and middle exopodal segments are attenuate at the point of origination of the outer spine, and by differences of the armature of mouthparts (mandibular palp, maxilla, maxilliped). This report extends the range of Balinella from anchialine caves of the Bahamas to hypogean waters of the Yucatan Peninsula. The introduction of epacteriscid copepods onto the Yucatan Peninsula may be an old event; diversification by genera into non-cave habitats appears to be secondary.


9.
Artículo
*En hemeroteca, SIBE-Chetumal
The remarkable diversity of subterranean cirolanidae (Crustacea: isopoda) in the peri-caribbean and mexican realm
Iliffe, Thomas M. (autor) ; Botosaneanu, Lazare (autor) ;
Contenido en: Bulletin de l'Institut Royal des Sciences naturelles de Belgique. Biologie Vol. 76, (2006), p. 5-26 ISSN: 0374-6429
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
44181-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal

10.
- Artículo con arbitraje
A new Stygonitocrella Petkovski (Copepoda: harpacticoida) from a cave in Northern Mexico witch comments on the taxonomy of the genus
Suárez Morales, Eduardo ; Iliffe, Thomas M. (coaut.) ;
Clasificación: AR/592.097212 / S9
Contenido en: Hydrobiologia Vol. 544, no. 1 (2005), p. 215-228 ISSN: 0018-8158
Bibliotecas: Chetumal , San Cristóbal
Cerrar
SIBE Chetumal
ECO030004586 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010018990 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

The cave-dwelling harpacticoid copepod fauna of Mexico is still yet to be known. There are only a few records related to karstic caves, but most refer to epigean forms. The analysis of samples collected in a cave system in Northern Mexico yielded two female specimens of an unknown harpacticoid copepod species which is described herein. It was assigned to the genus Stygonitocrella Petkovski, 1976 mainly because of the presence of a single endopodal segment on legs 1–4; the new species, S. mexicana n. sp. differs from its congeners by a combination of characters related to the segmentation and armature of the swimming legs 1–4, the fifth leg of the female, and the strcture of the antennae. Based on the current limits of Stygonitocrella, two new subgenera are proposed to recognize different morphological patterns based on the presence or absence of an inner baseoendopodal lobe in the female fifth leg, a character not evaluated before. This lobe is absent in the new species and in other five species now contained in the subgenus Eustygonitocrella. A lobe is present in the new subgenus Fiersiella, also with six species. This is the second record of Stygonitocrella in North America, after S. (Fiersiella) sequoyahi Reid, Hunt & Stanley, 2003; it is the only North American cave-dwelling species of the genus. It is suggested that the influence of marine transgressions in Northern Mexico was related to the origin of the new species as part of a group of troglobitic forms originated from marine interstitial ancestors that colonized the freshwater caves. A key for the identification of all the known species of Stygonitocrella is also provided.