Evolutionary history of African lungfish: a hypothesis from molecular phylogeny

Tokita, Masayuki; Okamoto, Taku; Hikida, Tsutomu

doi:10.1016/j.ympev.2004.11.025

Cited by 28 publications

(37 citation statements)

References 24 publications

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“…Those analyses were largely focused on relationships between lungfish genera. Numerous molecular phylogenies were published with the intention of determining the phylogenetic position of lungfish relative to other groups of extant vertebrates, such as amphibians and actinopterygians (Zardoya & Meyer, , b, ; Brinkmann et al ., ; Takezaki et al ., ), and one molecular phylogeny for extant lungfishes was published based on the 16S gene (Tokita, Okamoto & Hikida, ). Using data from the comparative morphological atlas, I combine new discrete osteological characters, soft tissue characters, and ribosomal RNA (rRNA) nucleotide characters into a comprehensive phylogenetic analysis of the relationships of extant lungfishes.…”

Section: Introductionmentioning

confidence: 99%

The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)

Criswell

2015

Zool J Linn Soc

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Lepidosirenidae is a clade of freshwater lungfishes that include the extant South American Lepidosiren paradoxa Fitzinger, 1837 and African species of the genus Protopterus. These genera have been geographically separated since the break-up of Gondwana in the Early Cretaceous, but they display similar biology and morphology. Species were distinguished by a combination of features such as head-to-body ratios, the number of pairs of ribs, and the presence of external gills, but no discrete skeletal characters were identified, and no comparative studies including all extant species have been published. I used computed tomography (CT), X-ray photography, and specimens from museum collections to describe the skeletal morphology of all species of lepidosirenid in a comparative context. I digitally disarticulated the bones in each specimen to compile a comparative atlas of the cranial and pectoral elements of all extant lungfishes, which has the potential to increase the correct identifications of specimens in museum collections. The morphology of the frontoparietal, parasphenoid, supraorbital, and suboperculum differ between species. I used those characters, along with molecular sequence data from the ribosomal RNA gene 16S, to run combined morphological and molecular phylogenetic analyses. Lepidosirenidae is monophyletic in all analyses, but the interrelationships of the species of Protopterus vary with the different sources of character data.

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Section: Introductionmentioning

confidence: 99%

The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)

Criswell

2015

Zool J Linn Soc

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“…It is accepted that Dipnoi is the sister group of tetrapods, which is supported by morphological analysis of extant and extinct vertebrates (Cloutier & Ahlberg, ; Zhu & Yu, ), behavioral (King, Shubin, Coates, & Hale, ), physiological (Christensen‐Dalsgaard, Brandt, Wilson, Wahlberg, & Madsen, ), and molecular analyses (Amemiya et al, ; Betancur‐R et al, ; Brinkmann, Venkatesh, Brenner, & Meyer, ; Hedges, Hass, & Maxson, ; Liang, Shen, & Zhang, ; Zardoya & Meyer, ). Among Dipnoi, the Australian lungfish, Neoceratodus forsteri (Krefft, 1870), is consistently found to be sister taxon to all other extant lungfishes in morphological and molecular analyses (Brinkmann et al, ; Criswell, ; Hedges et al, ; Heinicke, Sander, & Hedges, ; Tokita, Okamoto, & Hikida, ). Due to their phylogenetic position, lungfishes, and in particular the Australian lungfish, are pivotal for investigating the evolution and development of early tetrapods.…”

Section: Introductionmentioning

confidence: 99%

Cephalic muscle development in the Australian lungfish,Neoceratodus forsteri

Ziermann

Clement

Ericsson

et al. 2017

Journal of Morphology

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Lungfishes are the extant sister group of tetrapods. As such, they are important for the study of evolutionary processes involved in the water to land transition of vertebrates. The evolution of a true neck, that is, the complete separation of the pectoral girdle from the cranium, is one of the most intriguing morphological transitions known among vertebrates. Other salient changes involve new adaptations for terrestrial feeding, which involves both the cranium and its associated musculature. Historically, the cranium has been extensively investigated, but the development of the cranial muscles much less so. Here, we present a detailed study of cephalic muscle development in the Australian lungfish, Neoceratodus forsteri, which is considered to be the sister taxon to all other extant lungfishes. Neoceratodus shows several developmental patterns previously described in other taxa; the tendency of muscles to develop from anterior to posterior, from their region of origin toward insertion, and from lateral to ventral/medial (outside-in), at least in the branchial arches. The m.protractor pectoralis appears to develop as an extension of the most posterior m.levatores arcuum branchialium, supporting the hypothesis that the m.cucullaris and its derivatives (protractor pectoralis, levatores arcuum branchialium) are branchial muscles. We present a new hypothesis regarding the homology of the ventral branchial arch muscles (subarcualis recti and obliqui, transversi ventrales) in lungfishes and amphibians. Moreover, the morphology and development of the cephalic muscles confirms that extant lungfishes are neotenic and have been strongly influenced via paedomorphosis during their evolutionary history.

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“…N. forsteri is the only species in which the retina has been studied in detail (Marshall, 1986;Tokita et al, 2005;Bailes et al, 2006). Up to five spectrally distinct types of large retinal photoreceptors have been found in N. forsteri: one type of rod (λ max 540 nm) and four types of cones (UVS λ max 366 nm, SWS λ max 479 nm, MWS λ max 558 nm, and LWS λ max 623 nm).…”

Section: Introductionmentioning

confidence: 99%

Morphology, Characterization and Distribution of Retinal Photoreceptors in the South American (Lepidosiren paradoxa) and Spotted African (Protopterus dolloi) Lungfishes

et al. 2016

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Lungfishes are the closest living relatives of the ancestors to all terrestrial vertebrates and have remained relatively unchanged since the early Lochkovin period (410 mya). Lungfishes, therefore, represent a critical stage in vertebrate evolution and their sensory neurobiology is of considerable interest. This study examines the ultrastructure of the retina of two species of lungfishes: the South American lungfish, Lepidosiren paradoxa and the spotted African lungfish, Protopterus dolloi in an attempt to assess variations in photoreception in these two ancient groups of sarcopterygian (lobe-finned) fishes. In juvenile P. dolloi, the retina contains one rod and two cone photoreceptor types (one containing a red oil droplet), while only one rod and one cone photoreceptor type is present in adult L. paradoxa. Both species lack double cones. The large size and inclusion of oil droplets in both species apart from one of the cone photoreceptor types in P. dolloi suggests that L. paradoxa and P. dolloi are adapted for increasing sensitivity. However, the complement of photoreceptor types suggests that there may be a major difference in the capacity to discriminate color (dichromatic and monochromatic photoreception in P. dolloi and L. paradoxa, respectively). This study suggests that the visual needs of these two species may differ.

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Evolutionary history of African lungfish: a hypothesis from molecular phylogeny

Cited by 28 publications

References 24 publications

The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)

The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)

Cephalic muscle development in the Australian lungfish,Neoceratodus forsteri

Morphology, Characterization and Distribution of Retinal Photoreceptors in the South American (Lepidosiren paradoxa) and Spotted African (Protopterus dolloi) Lungfishes

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