Shark fossil diversity (Squalomorphii, Squatinomorphii, and Galeomorphii) from the Langhian of Brielas (Lower Tagus Basin, Portugal)

Fialho, P.; Balbino, Ausenda Cáceres; Legoinha, Paulo; Antunes, Miguel Telles

doi:10.1002/gj.3965

Cited by 5 publications

(4 citation statements)

References 42 publications

(46 reference statements)

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“…Oligocene occurrences include Germany ( Freess & Möller, 1993 ) and Virginia and North Carolina ( Müller, 1999 ) in the USA. Miocene records include Austria ( Hiden, 1995 ; Schultz, 2013 ), Costa Rica ( Laurito, 1999 ), France ( Joleaud, 1912 ; Cappetta, 1970 ; Brisswalter, 2009 ; Vialle, Adnet & Cappetta, 2011 ), Germany ( Barthelt et al, 1991 ; Bracher, 2000 ; Bracher & Unger, 2007 ; Pollerspöck & Straube, 2017 ; Höltke et al, 2022 ), Madagascar ( Andrianavalona et al, 2015 ), Spain ( Mendiola & López, 2005 ), and Portugal ( Balbino, 1996 ; Fialho et al, 2020 ), as well as Maryland ( Visaggi & Godfrey, 2010 ) and Florida ( Boyd, 2016 ) in the USA. Pliocene occurrences include Costa Rica ( Laurito, 1999 ), Italy ( Marsili, 2008 ), and Spain ( Mora Morote, 1996 ; Mas, 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Observations on heterodonty within the dentition of the Atlantic Sharpnose Shark, Rhizoprionodon terraenovae (Richardson, 1836), from the north-central Gulf of Mexico, USA, with implications on the fossil record

Ebersole

Kelosky

Huerta-Beltrán

et al. 2023

PeerJ

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The Atlantic Sharpnose Shark, Rhizoprionodon terraenovae (Richardson, 1836), is the most common small coastal requiem shark in the north-central Gulf of Mexico, USA. Despite this fact, little is known about the dental variation within this taxon. To help rectify this shortcoming, we examined 126 male and female R. terraenovae jaws sets across all maturity stages to document the various types of heterodonty occurring in the dentition of this taxon. Quantitative data gathered from a subset of our sample allowed for us to place teeth within the dentition of R. terraenovae into standardized upper and lower parasymphyseal/symphyseal, anterior lateral, and posterior tooth groups. As with all carcharhinid sharks, the dentition of R. terraenovae exhibits monognathic and dignathic heterodonty. We also observed significant ontogenetic heterodonty in the species, as the teeth and dentition progress through five generalized developmental stages as the shark matures. The ontogenetic development of serrations on the teeth appears to be closely related to documented dietary changes as the shark matures. Initial diets are comprised of high percentages of invertebrate prey like shrimp, crabs, and squid, but this transitions through ontogeny to a diet that is more reliant on fishes. We also provide the first documentation of gynandric heterodonty in mature male R. terraenovae, with development of these seasonal teeth likely enabling a male to grasp female sharks during copulation. Our analysis revealed a tremendous amount of variation in the dentition of R. terraenovae, which has direct implications on the taxonomy of fossil Rhizoprionodon. A comparison of the jaws in our sample to those of the extant species of Rhizoprionodon and the morphologically similar Loxodon, Scoliodon, and Sphyrna allowed us to formulate a list of generic-level characteristics to assist with the identification of isolated teeth. When applied to the fossil record, it is shown that some species previously assigned to Rhizoprionodon likely belong to one of the other aforementioned genera. The earliest occurrence of unequivocal Rhizoprionodon teeth in the fossil record are those of the Eocene †R. ganntourensis (Arambourg, 1952), the oldest records of which occur in early Ypresian deposits in Alabama and Mississippi, USA. The early Eocene occurrence of unequivocal fossil Rhizoprionodon teeth in Alabama predates the first occurrence of Negaprion, Galeocerdo, and Carcharhinus teeth in the state, supporting published molecular and morphological phylogenies positing a basal position for Rhizoprionodon within the Carcharhinidae.

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Section: Discussionmentioning

confidence: 99%

Observations on heterodonty within the dentition of the Atlantic Sharpnose Shark, Rhizoprionodon terraenovae (Richardson, 1836), from the north-central Gulf of Mexico, USA, with implications on the fossil record

Ebersole

Kelosky

Huerta-Beltrán

et al. 2023

PeerJ

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“…• Type of publication: include if it is a peer-reviewed journal publication; exclude if it is not (e.g., congress abstract, master or doctoral dissertation). From the 51 publications screened, only the following 36 met the conditions of the inclusion/exclusion criteria: Woodward (1889); Bonança (1891); Cotter (1888Cotter ( -1892 in Zbyszewski & Moitinho de Almeida (1950); Dollfus, Cotter & Gomes (1903-04); Zbyszewski (1947aZbyszewski ( , 1949Zbyszewski ( , 1967; Zbyszewski (1947bZbyszewski ( , 1947c in Zbyszewski & Moitinho de Almeida (1950); Zbyszewski & Moitinho de Almeida (1950); Serralheiro (1954); Cotter (1956); Zbyszewski & Ferreira (1962); Jonet (1964Jonet ( , 1965Jonet ( -66, 1968Jonet ( , 1976Jonet ( , 1978; Antunes (1967Antunes ( , 1970; Antunes & Jonet (1970); Jonet, Kotchetoff & Kotchetoff (1975); Antunes, Jonet & Nascimento (1981); Antunes, Balbino & Cappetta (1999a, 1999b; Antunes et al (1999); Balbino & Cappetta (2000); Antunes & Balbino (2003Balbino ( , 2004Balbino ( , 2006Balbino ( , 2007Balbino ( , 2010a; Balbino & Antunes (2006); Ávila, Ramalho & Vullo (2012); Fialho, Balbino & Antunes (2019a); Fialho et al (2020).…”

Section: Methodology and Datamentioning

confidence: 99%

“…M. T. Antunes introduced washing and sieving methods, which greatly improved the collecting of small fossils (Antunes & Jonet 1970), therefore contributing to a more complete understanding of the repartition of fossil Chondrichthyes in the Portuguese geological record. Other research projects were carried on afterwards by Antunes & Jonet (1970); Jonet (1964Jonet ( , 1966Jonet ( , 1968Jonet ( , 1976; Antunes & Balbino (2003Balbino ( , 2004Balbino ( , 2006Balbino ( , 2007; Antunes, Balbino & Cappetta (1999a, 1999b; Balbino & Cappetta (2000); Balbino & Antunes (2006); and more recently, Antunes (2019a), andFialho et al (2020).…”

Section: Introductionmentioning

confidence: 99%

Fossil Chondrichthyes from the Neogene of Portugal: Diversity and Occurrence

2021

Self Cite

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Portugal has a rich fossil record both on the continent and in the Azores islands (Santa Maria). For decades, researchers have found thousands of fossils and identified hundreds of species from major taxonomic groups. The present work focuses on analyzing the scientific literature on fossils of Chondrichthyes collected in fossiliferous deposits of the Neogene. Fossils of sharks and rays, teeth, dermal denticles, and caudal spines were discovered in deposits from Aquitanian to Piacenzian (Neogene). About 105 deposits were identified and studied on the mainland and on the Island of Santa Maria, most of which have disappeared or are currently inaccessible. In total, 36 publications list 91 species of Chondrichthyes, 11 of which were described for the first time in Portugal, and 61 genera. Twelve orders are represented in the material published so far.

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“…2011), the Langhian of Sardinia (Italy) (Comashi Caria 1973) and Portugal (Fialho et al . 2020), from the Serravalian of France (Canevet 2011), and the Tortonian of Portugal (Antunes & Jonet 1970; upper teeth of pl. 4 figs 1–2 belong to Hexanchus , not Notorynchus ).…”

Section: Systematic Palaeontologymentioning

confidence: 99%

Chondrichthyan (Holocephali, Squalomorphii and Batomorphii) remains from the Badenian of southern Hungary (Tekeres, Mecsek Mountains): the first deepwater cartilaginous fishes from the Middle Miocene of the Central Paratethys

Szabó

Kocsis

Tóth

et al. 2022

Papers in Palaeontology

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Middle Miocene (Badenian) chondrichthyan fossils collected from the Tekeres Schlieren Member of the Baden Formation at Tekeres (southern Hungary, Mecsek Mts) are described here. The chondrichthyan assemblage is exceptionally diverse and well-preserved, and consists of holocephalans, selachians and batomorphs. Nine taxa are reported for the first time from the Badenian of the Central Paratethys: Ischyodus sp., Hexanchus cf. nakamurai, Centrophorus sp., Isistius triangulus, Pristiophorus sp., Sphyrna integra, Raja cf. gentili, Dasyatis cf. pastinaca and Mobula fragilis. The fauna is characterized by many deepwater taxa, making it the first bathyal vertebrate assemblage of the Badenian Central Paratethys. However, typically shallow water, littoral forms are also present, which are worn

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Shark fossil diversity (Squalomorphii, Squatinomorphii, and Galeomorphii) from the Langhian of Brielas (Lower Tagus Basin, Portugal)

Cited by 5 publications

References 42 publications

Observations on heterodonty within the dentition of the Atlantic Sharpnose Shark, Rhizoprionodon terraenovae (Richardson, 1836), from the north-central Gulf of Mexico, USA, with implications on the fossil record

Observations on heterodonty within the dentition of the Atlantic Sharpnose Shark, Rhizoprionodon terraenovae (Richardson, 1836), from the north-central Gulf of Mexico, USA, with implications on the fossil record

Fossil Chondrichthyes from the Neogene of Portugal: Diversity and Occurrence

Chondrichthyan (Holocephali, Squalomorphii and Batomorphii) remains from the Badenian of southern Hungary (Tekeres, Mecsek Mountains): the first deepwater cartilaginous fishes from the Middle Miocene of the Central Paratethys

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