Jatziry Marlene Gracian-Negrete’s research while affiliated with National Autonomous University of Mexico and other places

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Publications (4)


FISHES OF ARCHIPELAGO OF REVILLAGIGEDO ISLANDS: A SYSTEMATIC AND BIOGEOGRAPHIC UPDATE
  • Article

May 2020

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307 Reads

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4 Citations

BIOCYT Biología Ciencia y Tecnología

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Jatziry Marlene Gracian-Negrete

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We present a comprehensive and update checklist systematic of the icthyofauna of this insular region, which is comprised by 366 species, 241 genera, 101 families, 28 orders and tree classes. The families with the most richness specific were: Carangidae (20 spp.), Serranidae (19) and Muraenidae (18). Socorro Island was recorded 220 species, Clarion Island 179, San Benedicto Island 128; followed by Roca Partida Island 62. This diversity as well as endemic species number is relationship with the surface of each island. There is a higher similarity ictiofaunistic between Clarion Island and Socorro Island; while, the lowest similarity was between San Benedicto Island and Roca Partida Island. The ichthyogeography of the Revillagigedo Archipelago has a higher affinity with the Panamic province (42.3%), followed by the Cortes (41.5%). A higher number of species are of the wide distribution (circumglobal: 21 %; amphipacific 22.4 %). Also, endemic species are represented by 26 species (7.1%).


FIGURE 1. Landmarks: (1) rostral tip of premaxilla, (2) posterior end of nuchal spine, (3) anterior insertion of dorsal fin, (4) posterior insertion of dorsal fin, (5) anterior insertion of adipose fin, (6) dorsal insertion of caudal fin, (7) midpoint of caudal border of hypural plate, (8) ventral insertion of caudal fin, (9) posterior insertion of anal fin, (10) anterior insertion of anal fin, (11) dorsal base of pelvic fin, (12) dorsal base of pectoral fin, (13) dorsal end of opercle, (14) postero-ventral margin of preopercle, (15) posterior end of maxilla, (16) center of eye.  
TABLE 1 . Morphometric and meristic data of holotype (H) and paratypes (n=50) of Brycon costaricensis. (SD=standard deviation).
FIGURE 2. (A) Holotype (128.1 mm SL) of Brycon costaricensis depicting live coloration (photo by Atsunobu Murase) and (B) preserved paratype (UCR 0457, 98.5 mm SL).  
FIGURE 4. A. Scatter plot of the first two axis of the CVA of the body shape for three Central American Brycon species (circles=B. guatemalensis, squares=B. behreae, equis=B. costaricensis). Deformation grids indicate extreme shape along CV axes (B=CV1-, C=CV1+, D=CV2-, E=CV2+).  
FIGURE 3. (A) Map of lower Central America, showing known distribution of Brycon costaricenses (light area); (B, C) typelocality (D, E) indicated by the star, circles represent remaining localities.  
A new species of Brycon (Characiformes: Characidae) from Nicaragua and Costa Rica, with a key to the lower Mesoamerican species of the genus
  • Article
  • Full-text available

October 2013

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1,486 Reads

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9 Citations

Zootaxa

A new species of Brycon is described from the Atlantic slope of Nicaragua and Costa Rica. Brycon costaricensis n. sp. differs from all other Central American Brycon species by the following combination of characters: 49 to 54 scales in the lateral line; 5 or 6 rows of scales between lateral line and pectoral fin base; 9 to 11 rows of scales between lateral line and dorsal fin base; 5 to 7 rows of scales between lateral line and anal fin base; anal fin notably longer than head, with 33 to 37 total rays; and a elongated and shallow caudal peduncle, whose length is 1.78 to 2.35 times its depth. A key to lower Mesoamerican species of the genus is also presented.

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Fig. 1. Esqueleto caudal de Achirus lineatus (Linnaeus, 1758), 40 mm LP. CNP-IBUNAM-232. Estructuras observadas: epural (EP); hipural (HP); espina hemal (EH); espina neural (EN); parahipural (PH); radios principales (RP); centro preural 1 y 2 (CPU1, 2).  
Fig. 2. Esqueleto caudal de Achirus mazatlanus (Steindachner, 1869), 36 mm LP. CNP-IBUNAM s/n. Estructuras observadas: epural (EP); hipural (HP); espina hemal (EH); espina neural (EN); parahipural (PH); radios principales (RP); centro preural 1 y 2 (CPU1, 2).  
Osteología Comparada del Esqueleto Caudal de Achirus lineatus y Achirus mazatlanus (Pleuronectiformes: Achiridae)

June 2012

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345 Reads

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8 Citations

International Journal of Morphology

Jatziry Marlene Gracian-Negrete

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Mónica González-Isáis

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[...]

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The caudal skeleton is recognized as an important source of information for establishment of teleostean interrelationships. A comparative analysis of the caudal skeleton of Achirus lineatus (Linnaeus, 1758) and A. mazatlanus (Steindachner, 1869) was performed, based on the examination of specimens from biological museums and others materials collected in Veracruz localities and Baja California Sur (Mexico). The specimens were identified using taxonomic keys and processed by means of clearing and staining methods, in order to determine the differences and similarities on the elements that characterized the caudal complex of this species. The caudal formula in A. lineatus and A. mazatlanus is composed by: 1 epural + 5 hypurals + 1 parhypural, one neural and two hemal spines, as well as the presence of 16 principal rays and absence of procurrent rays and the uroneural bone. The hypural in the A. lineatus are closer together; however, in general, differences were not observed among the species. Therefore, A. lineatus and A. mazatlanus are established as sister species.

Citations (4)


... Migration is known to occur between those sites, with various species regarded as Revillagigedo endemics present as waifs or even with small populations around the tip of the Baja peninsula (Robertson and Allen, 2024). The effects of isolation of the Revillagigedo Islands are amply demonstrated by the existence of 13 endemic species of reef fishes there that have their closest relatives on the mainland (Robertson and Cramer 2009;Del Moral-Flores et al. 2020;Fourriére et al. 2016;Acevedo-Álvarez et al. 2021). ...

Reference:

Cryptic Diversity in Scorpaenodes xyris (Jordan & Gilbert 1882) (Scorpaeniformes: Scorpaenidae) Throughout the Tropical Eastern Pacific
FISHES OF ARCHIPELAGO OF REVILLAGIGEDO ISLANDS: A SYSTEMATIC AND BIOGEOGRAPHIC UPDATE
  • Citing Article
  • May 2020

BIOCYT Biología Ciencia y Tecnología

... El esqueleto caudal, junto con el cráneo y la columna vertebral, son una de las fuentes de caracteres más importantes, utilizados en estudios filogenéticos en teleósteos (Arratia, 2008;Arratia, 2009). Particularmente el esqueleto caudal y la columna vertebral han sido fuente de estudio en diferentes grupos de peces, lo que ha demostrado el valor taxonómico, de estas estructuras, en el diagnóstico y separación de familias, géneros y hasta especies (Costa, 2012;Gracian-Negrete et al., 2012;Jawad & Jig, 2017;Rubio-Rodríguez et al., 2016). Por lo tanto, es importante explorar herramientas que puedan utilizarse como posibles fuentes de Métodos: Se realizó un análisis comparativo en 44 especímenes diafanizados y teñidos, para identificar diferencias y similitudes en los elementos de la columna vertebral y del complejo caudal entre las especies del género. ...

Osteología Comparada del Esqueleto Caudal de Achirus lineatus y Achirus mazatlanus (Pleuronectiformes: Achiridae)

International Journal of Morphology

... Tales avances se han visto reflejados en diversas publicaciones científicas incrementando el número total de especies reconocidas para el país (e.g., Schmitter-Soto, 2017;Angulo et al., 2015;en prep., & Álvarez-Calderón et al., 2018; entre otros), ampliando los ámbitos de distribución vertical y/o geográfico conocido para varias especies (e.g. Angulo et al., 2015;2017;2018a, b;Arguedas, 2019;Rodríguez-Arias et al., 2019, & Angulo et al., 2020 e incluso añadiendo/describiendo nuevas especies para la ciencia, algunas de ellas con localidades tipo en Costa Rica (e.g., Matamoros et al., 2013;Angulo & Gracian-Negrete, 2013;Angulo et al., 2018a, & Ota et al., 2020, entre otros. Dado esto, el conocimiento sobre la composición taxonómica de la fauna íctica (de aguas continentales e insulares) costarricense ha cambiado, de forma sustancial, en los últimos años; no solo por la adición de múltiples especies y taxones supra-específicos sino también como consecuencia de diversos rearreglos y cambios taxonómicos en los diferentes niveles jerárquicos, principalmente géneros, pero también familias y órdenes Nelson et al., 2016;Angulo et al., 2017;2018;2020 en prep.), esto tomando como base la publicación de Bussing (1998). ...

A new species of Brycon (Characiformes: Characidae) from Nicaragua and Costa Rica, with a key to the lower Mesoamerican species of the genus

Zootaxa

... Rick had a tremendous knowledge of eastern Pacific fishes and a keen awareness of how distributions were changing as oceans grow warmer, including sporadic records of fishes brought north by warm El Niño events. He went on to publish a number of new fish records (Feeney, 2006;Feeney et al., 2007;Gracian-Negrete et al., 2012;Lea, 2016, 2018;Kirsch et al., 2018), including collaborations with scientists in both North and South America. ...

Two record-sized Pacific Lined Soles Achirus mazatlanus (Pleuronectiformes: Achiridae), from the Eastern Pacific
  • Citing Article
  • October 2012

Marine Biodiversity Records