A Remarkable Species Flock of Pupfishes, Genus Cyprinodon, from Yucatán, México

Humphries, Julian M.; Miller, Robert Rush

doi:10.2307/1444040

Cited by 54 publications

(79 citation statements)

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“…2) and the wide-ranging maritime clade (2A), which, with one exception, C. tularosa from southcentral New Mexico, occurs in coastal mainland pupfishes of North and South America and islands of the West Indies. The monophyly of the Yucatan clade is consistent with the suggestion from genetic similarities that the coastal species, C. artifrons, was ancestral to the Laguna Chichancanab species flock, a complex of six ecologically diverse taxa that, based on past lake levels (Covich and Stuiver, 1974) and low levels of genetic divergence, might be only 8,000 years old (Humphries, 1984;Strecker et al, 1996).…”

Section: Atlantic and Gulf Coasts And Westsupporting

confidence: 85%

“…3). This is consistent with the estimated age of the only fossil assigned to the genus Cyprinodon, a specimen from Death Valley of Late Miocene or Early Pliocene age (Miller, 1945(Miller, , 1981.…”

Section: From Lake Enriquillo}]) (B)supporting

confidence: 82%

“…In this paper, we use mitochondrial DNA variation to assess the historical biogeography of the pupfish genus Cyprinodon, the most widespread fish genus in a region comprising the warm deserts and southern Great Plains of southwestern North America (Miller, 1981). As a group, cyprinodontids of this region inhabit lowland waters where they are less likely than many other fishes to cross basin divides and, therefore, more likely to preserve ancient patterns of geographic variation (but see Minckley et al, 2002, for a possible exception in the Mexican highlands).…”

mentioning

confidence: 99%

“…Approximately 30 of the 50 or so species of Cyprinodon occur in arid regions of southwestern North America where they are primarily distributed allopatrically as endemics to relatively small bodies of water, often single streams or spring-systems in isolated valley floors (Miller, 1981). The remaining 20 or so species occur as local endemics in the West Indies-Yucatan Peninsula region or as wide-ranging species with allopatric distributions in coastal or coastal-plain waters from Massachusetts to Venezuela (Smith et al, 1990;Wildekamp, 1995).…”

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confidence: 99%

“…Experiments with allopatric pupfishes show little evidence of pre-or post-mating isolation between divergent species (Turner and Liu, 1977;Cokendolpher, 1980;Villwock, 1982). In the wild, hybridization is indicated in all three morphologically well-studied instances of contact between species (Minckley, 1969;Humphries and Miller, 1981;Minckley and Minckley, 1986), and genetic introgression exists in all known situations where endemic species were exposed to anthropogenic introduction of a non-native pupfish Echelle, 1994, 1996;Childs et al, 1996), including one instance of introgression over more than 400 river-kilometers in less than five years (Echelle and Connor, 1989).…”

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confidence: 99%

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Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Echelle¹,

Carson²,

Echelle³

et al. 2005

Copeia

101

109

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Analysis of mtDNA sequence variation (2,548 bp from ND2, cytb, and part of the control region) indicates that the genus Cyprinodon began diverging in the Late Miocene from a common ancestor with Megupsilon, a monotypic genus on the Mesa del Norte of Mexico. The geographic pattern of mtDNA variation, with estimates of divergence time, suggests that by the end of the Miocene Cyprinodon occurred from the Atlantic Coast and West Indies to near the western margin of North America via ancestral Rio Grande and Colorado River systems. Phylogeographic structure within the major mtDNA complexes supports a variety of hypotheses from geology and previous phylogenetic analyses for Late Neogene connections among basins in southwestern North America now separated by formidable barriers to dispersal. Comparison of the mtDNA tree with previous phylogenetic inferences from allozymes indicates that reticulate evolution involving divergent lineages probably was important in the history of Cyprinodon.El análisis de variació n de secuencias de ADNmt (ND2, cytb, y parte de la región reguladora; 2,548 pb) indica que el género Cyprinodon empezó a divergir en el mioceno tardío de un antepasado comú n con Megupsilon, un género monotípico de la Mesa del Norte de México. El patró n geográfico de la variació n de ADNmt, con estimadas de los tiempos divergencias, sugiere que al llegar al fin del mioceno Cyprinodon ocurrió desde la costa Atlántica y las Antillas hasta casi el margen oeste de Norteamérica por los sistemas pluviales antiguos del río Bravo y del río Colorado. La estructura filogeográfica entre los grupos principales de ADNmt apoya a una variedad de hipó tesis de la geología y de los análisis filogenéticos anteriores para conexiones del neogeno tardío entre cuencas del suroeste de Norteamérica que ahora están separadas por barreras imponentes contra la dispersió n. La comparació n del árbol de ADNmt con deducciones filogenéticos anteriores de alozimas indica que la evolució n reticulada que incluye líneas divergentes probablemente fue importante en la historia del Cyprinodon.

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Section: Atlantic and Gulf Coasts And Westsupporting

confidence: 85%

Section: From Lake Enriquillo}]) (B)supporting

confidence: 82%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Echelle¹,

Carson²,

Echelle³

et al. 2005

Copeia

101

109

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Changes in growth rates of oral jaw elements produce evolutionary novelty in bahamian pupfish

Lencer

Riccio

McCune

2016

Journal of Morphology

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To understand the origins of novelty and the evolution of biological diversity, it is important to investigate the processes that generate phenotypic variation from genotypic variation. A number of path-breaking studies have revealed the genetic basis for phenotypic differences between distantly related taxa, but how qualitative change is produced during the early stages of divergence is largely unexplored. Here, we focus on striking differences in jaw morphology exhibited by three closely related sympatric pupfish species (genus Cyprinodon) from San Salvador Island, Bahamas as a basis for investigating the genetic sources of morphological variation in recently diverged species. San Salvador Island pupfish are trophically diverse and display derived jaw morphologies distinct from any other species in the genus. We illustrate these qualitative morphological differences between species with 3D-reconstructed CT-images and camera lucida drawings of the skulls of wild-caught fish. Quantitative data representing the size of individual bony skull elements in wild fish show how qualitatively novel morphologies arise as a consequence of changes to the size and shape of individual skull elements, particularly the dentary, premaxilla, and maxilla bones associated with the oral jaws. Consistent with these comparative data is that the growth rate of individual bony skull elements, measured on a developmental time series of lab-reared fish, differs between species. Our data provide a critical foundation for future studies developing San Salvador Cyprinodon pupfishes as a model system to understand the evolution and development of novel morphologies at the species level. J. Morphol. 277:935-947, 2016. © 2016 Wiley Periodicals, Inc.

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The anharmonic character of T_g and T_m transition

Hlaváček¹,

Kresalek²,

Souček³

1999

Macromolecular Symposia

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The idea of anharmonic oscillations has been extended to explain the glass transition or melting point. All ideas of free volume, vacancy transport, etc., have been respected but are treated as minor phenomena relative to harmonic‐anharmonic vibration transition. A simple model of coupled oscillators is studied. It is shown that coupled anharmonic oscillators can produce vibrations on entirely different levels of amplitudes, which explains the highly different coefficients of thermal expansion and cp values for solid and liquid states. At higher temperatures, for polymers in the rubber‐like zone, the theory of anharmonic coupled oscillators brings certain justification for the theories of De Gennes, Doi and Edwards or Rouse. The solid‐liquid transition seems to be connected on microlevel mainly with the enlargement of vibrational amplitudes of monomer or dimer units in polymer chain as the temperature increases.

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A Remarkable Species Flock of Pupfishes, Genus Cyprinodon, from Yucatán, México

Cited by 54 publications

References 0 publications

Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Changes in growth rates of oral jaw elements produce evolutionary novelty in bahamian pupfish

The anharmonic character of T_g and T_m transition

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A Remarkable Species Flock of Pupfishes, Genus Cyprinodon, from Yucatán, México

Cited by 54 publications

References 0 publications

Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Historical Biogeography of the New-World Pupfish Genus Cyprinodon (Teleostei: Cyprinodontidae)

Changes in growth rates of oral jaw elements produce evolutionary novelty in bahamian pupfish

The anharmonic character of Tg and Tm transition

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The anharmonic character of T_g and T_m transition