Héctor Botella
YOU?
Author Swipe
View article: Diversity of tooth mineralisation patterns at the base of crown chondrichthyans
Diversity of tooth mineralisation patterns at the base of crown chondrichthyans Open
The highly specialised dentitions of modern sharks enable them to exploit a wide range of food sources. Exceptional fossil preservation of three Late Devonian basal chondrichthyan taxa from the Anti-Atlas, Morocco, provides the unique oppo…
View article: New data on the Late Miocene chondrichthyans from the Western Mediterranean region (Alcoy Basin, Eastern Spain)
New data on the Late Miocene chondrichthyans from the Western Mediterranean region (Alcoy Basin, Eastern Spain) Open
¿The Mediterranean Basin has been subjected to important geological and paleogeographic events that haveshaped the evolution of the faunal assemblages that inhabit it. Two main events can be highlighted, the closure of its easternmargin by…
View article: Editorial: Tribute to Tiiu Märss and Philippe Janvier (16th International Symposium on Early and Lower Vertebrates)
Editorial: Tribute to Tiiu Märss and Philippe Janvier (16th International Symposium on Early and Lower Vertebrates) Open
The International Symposium on Early and Lower Vertebrates (ISELV) aims to promote thestudy of the origin and early evolution of our own evolutionary lineage. This volume serves as an example ofthe most recent symposium held in Valencia, S…
View article: First record of palaeozoic vertebrates from Peru
First record of palaeozoic vertebrates from Peru Open
Devonian vertebrates in South America are notably scarce compared with other continents, becoming this circumstance particularly evident in Peru, where no Palaeozoic vertebrates have been formally reported so far. In this paper, we report,…
View article: First fossil record (Middle Miocene) of the viper shark <i>Trigonognathus</i> Mochizuki and Ohe, 1990, in the Mediterranean realm
First fossil record (Middle Miocene) of the viper shark <i>Trigonognathus</i> Mochizuki and Ohe, 1990, in the Mediterranean realm Open
The genus Trigonognathus Mochizuki and Ohe, 1990, is a monospecific taxon of `lantern sharks¿ (i.e., family Etmopteridae), a group of small-sized bioluminescent deep-sea chondrichthyans, ranging in mature male specimens between 42¿47 cm to…
View article: Is Onychodontida (Osteichthyes, Sarcopterygii) monophyletic? Assessing discordant phylogenies with quantitative comparative cladistics
Is Onychodontida (Osteichthyes, Sarcopterygii) monophyletic? Assessing discordant phylogenies with quantitative comparative cladistics Open
Onychodontida (Osteichthyes, Sarcopterygii) was an extinct group of Devonian predatory marine fishes, representing an early branch in sarcopterygian evolution, and currently considered closely related to coelacanths (Actinistia). Due to th…
View article: Make it fun! A new proposal to organize tournaments for 12&U
Make it fun! A new proposal to organize tournaments for 12&U Open
The main goal of this article is to expose a comprehensive overview of mental health concerns in young athletes while playing in competitions and to provide a list of new different initiatives to organize tournaments for 12&U, with the aim…
View article: Biomechanics of <i>Machaeracanthus</i> pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans
Biomechanics of <i>Machaeracanthus</i> pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans Open
Biomechanics of Machaeracanthus pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans
View article: Biomechanics of <i>Machaeracanthus</i> pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans
Biomechanics of <i>Machaeracanthus</i> pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans Open
Biomechanics of Machaeracanthus pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans
View article: Biomechanics of<i>Machaeracanthus</i>pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans
Biomechanics of<i>Machaeracanthus</i>pectoral fin spines provide evidence for distinctive spine function and lifestyle among early chondrichthyans Open
Acanthodians are a major group of Paleaozoic jawed vertebrates that constitute a paraphyletic assemblage of stem-chondrichthyans (Brazeau and Friedman, 2015). Representatives of this group are characterized, among other traits, by the pres…
View article: Functional assessment of morphological homoplasy in stem-gnathostomes
Functional assessment of morphological homoplasy in stem-gnathostomes Open
Osteostraci and Galeaspida are stem-gnathostomes, occupying a key phylogenetic position for resolving the nature of the jawless ancestor from which jawed vertebrates evolved more than 400 million years ago. Both groups are characterized by…
View article: Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes)
Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes) Open
Nursery areas are fundamental for the success of many marine species, particularly for large, slow-growing taxa with low fecundity and high age of maturity. Here, we examine the population size-class structure of the extinct gigantic shark…
View article: Categorical versus geometric morphometric approaches to characterizing the evolution of morphological disparity in Osteostraci (Vertebrata, stem Gnathostomata)
Categorical versus geometric morphometric approaches to characterizing the evolution of morphological disparity in Osteostraci (Vertebrata, stem Gnathostomata) Open
Morphological variation (disparity) is almost invariably characterized by two non‐mutually exclusive approaches: (1) quantitatively, through geometric morphometrics; and (2) in terms of discrete, ‘cladistic’, or categorical characters. Unc…
View article: Pre-Messinian ecological diversity of Mediterranean sharks revealed by the study of their dermal denticles
Pre-Messinian ecological diversity of Mediterranean sharks revealed by the study of their dermal denticles Open
The Messinian salinity crisis (~5.59 Ma) is regarded as one of the most determining events for the recent evolutionary and palaeobiogeographic history of the Mediterranean biota. The impact of such episode has usually been assessed by eval…
View article: R scripts of performed analyses from Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes)
R scripts of performed analyses from Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes) Open
Nursery areas are fundamental for the success of many marine species, particularly for large, slow-growing taxa with low fecundity and high age of maturity. Here, we examine the population size-class structure of the extinct gigantic shark…
View article: R scripts of performed analyses from Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes)
R scripts of performed analyses from Use of nursery areas by the extinct megatooth shark <i>Otodus megalodon</i> (Chondrichthyes: Lamniformes) Open
Nursery areas are fundamental for the success of many marine species, particularly for large, slow-growing taxa with low fecundity and high age of maturity. Here, we examine the population size-class structure of the extinct gigantic shark…
View article: Late Devonian (Famennian) Chondrichthyes from Mexico
Late Devonian (Famennian) Chondrichthyes from Mexico Open
The Paleozoic vertebrate fossil record from Mexico is very scarce and strongly biased by rock exposure, composed mainly of upper Paleozoic (Carboniferous and Permian) outcrops (e.g., Sánchez-Zavala et al., 1999; Poole et al., 2005; Gonzále…
View article: The palaeontological virtual collection of the University of Valencia’s Natural History Museum: a new tool for palaeontological heritage outreach
The palaeontological virtual collection of the University of Valencia’s Natural History Museum: a new tool for palaeontological heritage outreach Open
The rise of new digitalization technologies is changing the way to access to the fossil collections for palaeontology outreach, providing new tools to preserve our important palaeontological heritage. In this sense, museums and palaeontolo…
View article: New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia)
New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia) Open
New vertebrate remains are reported from the Late Devonian (?Frasnian) Cuche Formation of northeastern Colombia, including a new taxon of antiarch placoderm (Colombialepis villarroeli, gen. et sp. nov., previously reported as Asterolepis) …
View article: New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia)
New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia) Open
New vertebrate remains are reported from the Late Devonian (?Frasnian) Cuche Formation of northeastern Colombia, including a new taxon of antiarch placoderm (Colombialepis villarroeli, gen. et sp. nov., previously reported as Asterolepis) …
View article: New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia)
New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia) Open
New vertebrate remains are reported from the Late Devonian (?Frasnian) Cuche Formation of northeastern Colombia, including a new taxon of antiarch placoderm (Colombialepis villarroeli, gen. et sp. nov., previously reported as Asterolepis) …
View article: Bioluminescent-like squamation in the galeomorph shark Apristurus ampliceps (Chondrichthyes: Elasmobranchii)
Bioluminescent-like squamation in the galeomorph shark Apristurus ampliceps (Chondrichthyes: Elasmobranchii) Open
Galeomorph sharks constitute the most taxonomically and ecologically diverse superorder of living selachians. Despite comprising several typically deep-water taxa, no bioluminescent species have been reported in this group so far. Interest…
View article: Vascular structure of the earliest shark teeth
Vascular structure of the earliest shark teeth Open
Here we use synchrotron tomography to characterise dental vasculature in the oldest known tooth-bearing sharks, Leonodus carlsi Mader, 1986 and Celtiberina maderi Wang, 1993. Three dimensional reconstruction of the vascular system and …
View article: Assessing metabolic constraints on the maximum body size of actinopterygians: locomotion energetics of <i>Leedsichthys problematicus</i> (Actinopterygii, Pachycormiformes)
Assessing metabolic constraints on the maximum body size of actinopterygians: locomotion energetics of <i>Leedsichthys problematicus</i> (Actinopterygii, Pachycormiformes) Open
Maximum sizes attained by living actinopterygians are much smaller than those reached by chondrichthyans. Several factors, including the high metabolic requirements of bony fishes, have been proposed as possible body‐size constraints but n…
View article: Patterns of ecological diversification in thelodonts
Patterns of ecological diversification in thelodonts Open
Here we explore the spatial, temporal and phylogenetic patterns of ecological diversification for the entire clade of thelodonts, one of the earliest groups of vertebrates and longest lasting of the Palaeozoic agnathans in the fossil recor…