Development and Organization of the Posterior Field of Ctenoid Scales in the Platycephalidae

Hughes, Dianne R.

doi:10.2307/1444564

Cited by 36 publications

(27 citation statements)

References 2 publications

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“…This is in agreement with Wiley & Johnson (2010) who counted transforming ctenoid scales among the synapomorphies of their Percomorphacea implying, as did Fraser (1972) and Roberts (1993), that the presence of spinoid and cycloid scales in this group represents secondary loss. The pseudo-cycloid scales found in two platycephalid species and interpreted by Hughes (1981) as failure to continue producing ctenii in scales where they initially existed, is evidence that secondary loss of ctenii can happen. The finding in this study of two different scale ontogenetic pathways alone, albeit in two apparently different ctenoid scale types (tranforming and peripheral), could indicate relationships.…”

Section: Resultsmentioning

confidence: 93%

“…In a 57.2-mm adult female the spines and some of the ctenii were truncated (Fig. 3d), possibly as a consequence of progressive resorption (Hughes 1981, Roberts 1993. Consequently, apogonid ctenoid scales exhibit three developmental phases, cycloid, spinoid and transforming ctenoid that develop in this order during scale ontogeny.…”

Section: Resultsmentioning

confidence: 97%

“…4f, 5a, b, c1). As the scale grows differentiation of form takes place through asymmetrical growth of different parts of the scale (Hughes 1981). For example, in an 85 mm platycephalid Cociella heemstrai a scale on the middle of the back has different proportions to a scale next to the anal fin (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Scale ontogeny in the cardinalfish family Apogonidae

Gon

2016

Zootaxa

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Following the discovery of spinoid scales in species of the cardinalfish genus Siphamia, a survey of 20 apogonid genera, using scanning electron microscopy, found that scale ontogeny in the Apogonidae usually proceeds along three phases, cycloid, spinoid and transforming ctenoid, that develop in that order. The transforming ctenoid scales of the Pempheridae, considered a sister group of the Apgogonidae by some authors, follow the same ontogenetic pattern. Transforming ctenoid scales are the ancestral scale type in the Apogonidae, making their spinoid and cycloid scales a secondary loss or reversal. Though sharing the transforming ctenoid scale type with the apogonids, the ontogeny of this scale type in several scorpionfishes (Scorpaenidae) does not have a spinoid phase. Recent molecular studies indicate that gobiids are related to apogonids, but the goby species examined in this study have peripheral ctenoid scales that lacked a spinoid phase in their ontogeny. The observations made in this study suggest that the peripheral ctenoid scale, the whole ctenoid scale and the crenate scale found in percomorph fishes were derived from a transforming ctenoid scale. Scale morphology and ontogeny could provide useful characters for resolving relationships between percomorph families.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 97%

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Scale ontogeny in the cardinalfish family Apogonidae

Gon

2016

Zootaxa

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“…Dorsal fin continuous and not incised at junction of spines and segmented rays. Scales ctenoid (with ctenial bases in posterior fields proximal to marginal cteni-see Hughes 1981; this is the transforming ctenoid scale of Roberts 1993). Most of head, including maxillae, dentaries, lachrymals, lateral aspects of snout, and interorbital region with scales; dorsum of snout mostly without scales.…”

Section: Methods and Abbreviationsmentioning

confidence: 99%

Redescription of the percoid fish Symphysanodon andersoni Kotthaus (Symphysanodontidae) from the northwestern Indian Ocean, <br />based on the holotype and the second known specimen

Anderson¹,

Chesalin²,

Jawad³

et al. 2015

Zootaxa

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Symphysanodon andersoni was described in 1974 from a single specimen collected southwest of Socotra Island, near the entrance to the Gulf of Aden. A more recent report (2003) of its capture in the Gulf of Kutch, Arabian Sea, was based on a misidentification. The second known specimen of the Bucktoothed Slopefish, S. andersoni, (at 204 mm SL the largest known specimen of the genus Symphysanodon) was collected off the south coast of Oman, Arabian Sea, in April 2014. Symphysanodon andersoni is distinguishable from its congeners by number of tubed scales in the lateral line, 60 to 65 versus 42 to 59 in the other species of the genus. In view of the fact that S. andersoni is poorly known, we redescribe it based on the holotype and the new specimen collected off Oman and provide the first color photograph of the species.

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“…SINCE the time of Agassiz 1 who was the first to use fish scales for taxonomy, the importance of scale morphology in the systematic studies of fish species has increased dramatically during the last decades owing to the introduction and development of scanning electron microscopy (SEM) [2][3][4][5][6] . It is currently being applied to evaluate population relationships in both freshwater and marine fishes 7,8 .…”

mentioning

confidence: 99%

Scanning Electron Microscopy of Scale and Body Morphology as Taxonomic Characteristics of Two Closely Related Cyprinid Species of Genus <i>Capoeta</i> Valenciennes, 1842 in Southern Iran

Teimori

2016

Current Science

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Comparative morphology and the microstructures of scales were studied in order to evaluate their possible contribution to taxonomic discrimination of two closely related cyprinid species, Capoeta saadi and Capoeta mandica in southern Iran. The results revealed certain features of fish body (mouth shape and the number and shape of gill rakers) relevant to taxonomic significance. Moreover, some characters related to scale morphology and microstructures (location of focus, inter-radial space, and number and type of radii, shape and size of lepidonts and tubercles) were considered important for discrimination of these species. Such a study will give necessary information for identification of fish species, particularly during field study and for the fossil materials, where no molecular data are available, and of specimen which are deposited in the museum.

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Development and Organization of the Posterior Field of Ctenoid Scales in the Platycephalidae

Cited by 36 publications

References 2 publications

Scale ontogeny in the cardinalfish family Apogonidae

Scale ontogeny in the cardinalfish family Apogonidae

Redescription of the percoid fish Symphysanodon andersoni Kotthaus (Symphysanodontidae) from the northwestern Indian Ocean, <br />based on the holotype and the second known specimen

Scanning Electron Microscopy of Scale and Body Morphology as Taxonomic Characteristics of Two Closely Related Cyprinid Species of Genus <i>Capoeta</i> Valenciennes, 1842 in Southern Iran

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