Evolution and Functional Anatomy of the Pectoral Fin Rays in Cyprinoid Fishes, with Emphasis on the Suckers (Family Catostomidae)

Lundberg, John G.; Marsh, Edie

doi:10.2307/2424074

Cited by 32 publications

(29 citation statements)

References 8 publications

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“…Individual cases of two unbranched anal fin rays as well as 4½ branched anal fin rays occur. The first two pectoral fin rays of Garra are usually unbranched (Lundberg and Marsh 1976;Stiassny and Getahun 2007). In G. barreimiae, however, one or two unbranched fin rays are present, but one unbranched pectoral fin ray is the common case.…”

Section: Meristicsmentioning

confidence: 99%

The morphological diversity of Garra barreimiae [Teleostei: Cyprinidae]

et al. 2018

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Garra barreimiae (Fowler and Steinitz, Bull Res Counc Isr 5B:262-289, 1956) is a freshwater fish that lives throughout the Hajar Mountains of Oman and the United Arab Emirates. Previously, four different genetic clades (West clade, Central Clade, North clade and East clade) have been identified within this species. This study observes morphological differences between these clades using morphometrics and meristics as well as micro CT imaging, further strengthening the assumption that the taxon of G. barreimiae should be restricted to one of the genetic clades detected. Although many morphometric and meristic characteristics are highly variable within the clades, the West clade fits the original description of G. barreimiae and is distinguishable by its higher number of fifteen to seventeen gill rakers on the lower limb of the first gill arch (compared to the other clades with ten to fourteen gill rakers), its seven

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Section: Meristicsmentioning

confidence: 99%

The morphological diversity of Garra barreimiae [Teleostei: Cyprinidae]

et al. 2018

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“…Lundberg & Marsh (1976) suggested that L. chalumnae spends much of its time resting on (or moving on) its paired fins on the sea floor because the lepidotrichia are unbranched and the segments greatly foreshortened (as in the catostomid cyprinoids). Fricke et al (1987) did not observe Latimeria to contact the substrate with its paired fins.…”

Section: Cranial Morphologymentioning

confidence: 99%

Patterns, trends, and rates of evolution within the Actinistia

Cloutier

1991

Environ Biol Fish

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The interrelationships of 31 actinistian species (including Latimeria chalumnae) are analyzed based on a cladistic analysis of 75 osteological characters. Inference of evolutionary trends (e.g., modification of body shape and skull morphology) from the phylogenetic patterns demonstrates that the morphology of actinistians is less conservative than has been proposed previously. This empirical cladistic approach supports two distinct tempos of evolution during an evolutionary history of 380 million years. Along a phylogenetic pathway originating with a Devonian stem-species and ending with the living Latimeria chalumnae (including 101 morphological changes and 18 cladogenetic events), the first tempo occurred during the Devonian -Permian periods as a decreasing rate of morphological changes, which was followed by a stabilizing tempo during the Permian -Recent periods. The decreasing tempo is characterized by a sequence of gradual versus quantum temporal changes and low versus faster rates, whereas the stabilizing tempo primarily is gradual and low. In contrast to a common assumption, no significant correlation was found between the rates of morphological evolution and the temporal diversity of species.

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“…This segmented, bilaminar arrangement of the lepidotrichia provides actinopterygian fishes with the ability to control the relative stiffness and flexibility of individual fin rays and to either initiate or resist bending of the ray (Alben et al, 2007). Although there have been a small number of studies that examine fin ray morphology in benthic species (Lundberg and Marsh, 1976;Marsh 1977, Brä ndstä tter et al, 1990, our understanding of fin ray morphology is based almost exclusively on studies of pelagic fishes (Goodrich, 1904;Arita, 1971;Geerlink and Videler, 1987;Alben et al, 2007). This has led to a general impression that fin ray morphology is relatively uniform among ray-finned fishes.…”

Section: Introductionmentioning

confidence: 99%

Functional implications of variation in pectoral fin ray morphology between fishes with different patterns of pectoral fin use

Taft

2011

Journal of Morphology

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In this study, I compare the morphology from the pectoral fin rays from the benthic longhorn sculpin (Myoxocephalus octodecimspinosus) to those from a species that does not use its fins for substrate contact, the yellow perch (Perca flavescens). I use CT scanning technology to compare the shape and structure of the paired hemitrichia that make up the pectoral fin rays between these species. I found that the structure of hemitrichia of the fin rays in yellow perch is consistent with previous descriptions for pelagic fishes. They are almost completely segmented, have a crescent shape in cross section, and are branched distally. In contrast, longhorn sculpin hemitrichia exhibit morphological regionalization along the proximo-distal length of the ray. The most proximal 20-50% of the length of the hemitrichia is unsegmented and cylindrical in cross section. Distally, the fin rays of longhorn sculpin are segmented and crescent-shaped but do not branch. I measured the second moment of area of the hemitrichia at distances of 10%, 30%, 50%, and 70% distance along the length of the fin rays. The cylindrical regions of the sculpin hemitrichia had a higher second moment of area than the crescent-shaped regions in either species. I hypothesize that that this regionalization of individual fin rays provides resistance to bending proximally and flexibility distally, features that may be useful during substrate contact. This combination of an elongate, unsegmented proximal region and segmented distal region in fin rays has not yet been described among extant ray-finned fishes. However, this structure is reminiscent of that of the elongate cylindrical region found in the fossil sarcopterygian fish Eusthenopteron.

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Evolution and Functional Anatomy of the Pectoral Fin Rays in Cyprinoid Fishes, with Emphasis on the Suckers (Family Catostomidae)

Cited by 32 publications

References 8 publications

The morphological diversity of Garra barreimiae [Teleostei: Cyprinidae]

The morphological diversity of Garra barreimiae [Teleostei: Cyprinidae]

Patterns, trends, and rates of evolution within the Actinistia

Functional implications of variation in pectoral fin ray morphology between fishes with different patterns of pectoral fin use

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