Tooth Microstructure and Replacement in the Gulper Shark,<i>Centrophorus granulosus</i>(Squaliformes: Centrophoridae)

Moyer, Joshua K.; Bemis, William E.

doi:10.1643/ci-15-288

Cited by 12 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In elasmobranchs, two different tooth histotypes can be distinguished according to the mineralization pattern of the central tooth crown dentine [ 1 , 22 , 23 , 25 ]. Orthodont teeth have hollow pulp cavities surrounded by orthodentine underling the enameloid, a dental structure known from most sharks and rays [ 23 , 25 – 32 ]). In contrast, osteodont teeth have the pulp cavity filled completely with osteodentine, a dental structure mainly known in lamniform sharks [ 24 , 25 , 33 ] and some batoids [ 31 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation?

et al. 2018

View full text Add to dashboard Cite

Shark jaws exhibit teeth that are arranged into distinct series and files and display great diversities in shapes and structures, which not only is related to their function (grasping, cutting, crushing) during feeding, but also bear a strong phylogenetic signal. So far, most research on the relationship between shark teeth and feeding ecology and systematics focused on the external tooth morphology only. Although the tooth histology of sharks has been examined since the early 19th century, its functional and systematic implications are still ambiguous. Shark teeth normally consist of either a porous, cellular dentine, osteodentine (in lamniform sharks and some batoids) or a dense layer of orthodentine (known from different sharks). Sharks of the order Carcharhiniformes, comprising ca. 60% of all extant shark species, are known to have orthodont teeth, with a single exception—the snaggletooth shark, Hemipristis elongata. High resolution micro-CT images of jaws and teeth from selected carcharhiniform sharks (including extant and fossil snaggletooth sharks) and tooth sections of teeth of Hemipristis, other carcharhiniform and lamniform sharks, have revealed that (1) Hemipristis is indeed the only carcharhiniform shark filling its pulp cavity with osteodentine in addition to orthodentine, (2) the tooth histology of Hemipristis elongata differs from the osteodont histotype, which evolved in lamniform sharks and conversely represents a modified orthodonty, and (3) this modified orthodonty was already present in extinct Hemipristis species but the mineralization sequence has changed over time. Our results clearly show the presence of a third tooth histotype—the pseudoosteodont histotype, which is present in Hemipristis. The unique tooth histology of lamniform sharks might provide a phylogenetic signal for this group, but more research is necessary to understand the phylogenetic importance of tooth histology in sharks in general.

show abstract

Section: Introductionmentioning

confidence: 99%

Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation?

et al. 2018

View full text Add to dashboard Cite

show abstract

“…(2015) (range extension, to eastern North Pacific) [ 287 ]; Stehmann & Kukuev (2015): 73 (references to I . plutodus ), 75, 77 (caudal fin, distribution) [ 34 ]; Moyer & Bemis (2016): 535 (teeth replacement) [ 288 ]; Nakaya et al . (2016): 6 (feeding) [ 289 ]; Nelson et al .…”

Section: Resultsmentioning

confidence: 99%

Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae)

Petean

Carvalho

2018

PLoS ONE

View full text Add to dashboard Cite

The dalatiid genus Isistius Gill (1864) has three valid species currently recognized in the literature: Isistius brasiliensis Quoy & Gaimard (1824), I. plutodus Garrick & Springer (1964), and I. labialis Meng, Zhu & Li (1985). The most common species, I. brasiliensis, has a wide geographic distribution and is found in subtemperate and tropical seas circumglobally. A comparative analysis of specimens from different localities throughout its range, however, had never been undertaken. In the present paper, the morphological variation of this species along its entire distribution has been thoroughly analyzed, corroborating that it represents a single widespread species and that I. labialis is its junior synonym. The other congeneric species, I. plutodus, is known from only a few specimens and is also distributed worldwide. A detailed comparative analysis of available material of I. plutodus was conducted verifying its validity as a single widespread species. The present study analyzed in detail the external morphology (coloration, dentition, dermal denticles), internal morphology (skeleton, musculature), lateral-line canals, and morphometric and meristic characters of species of Isistius in order to better define the genus and its included valid species.

show abstract

“…Just as the form and function of shark teeth are putatively linked, so are tooth replacement and tooth function (Moyer et al, ). Tooth replacement has long interested researchers (Bertin, ; Breder Jr., ; Budker, ; Luer et al ., ; Moss, ; Moyer & Bemis, ; Smith et al ., ). Prior studies by Breder Jr. (), Overstrom (), and Correia () have estimated rates of tooth replacement in C. taurus , but the mechanical processes underlying tooth loss and succession within a tooth file remain unclear (Reif et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Bite performance and feeding behaviour of the sand tiger sharkCarcharias taurus

Moyer

Shannon

Irschick

2019

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

This study examines the feeding behaviour and kinematics of three sub-adult sand tiger sharks Carcharias taurus on display at Mystic Aquarium (Mystic, Connecticut, USA). Using high-speed video data from 52 bites, we identify kinematic variables associated with the expansive and compressive phases of the bite. The mean bite duration from the onset of the expansive phase to the conclusion of the compressive phase is mean (± SE) 0.14 ± 0.01 s and across the 10 fastest bites of each individual, the maximum performance average is 0.13 ± 0.01 s. Values of maximum performance do not vary significantly among individuals. When compared with kinematic bite data from species studied previously, these results indicate that body size is not the only determinant factor of bite duration. This study also provides detailed descriptions of feeding behaviours in C. taurus and presents documentation of tooth loss both prior to and during feeding, suggesting that there are multiple mechanisms of tooth loss and use in C. taurus. Finally, we discuss the behavioural and ecological components of prey capture in C. taurus and suggest points of consideration to facilitate interspecific comparisons of prey capture performance in ram-feeding, macrophagous elasmobranchs. K E Y W O R D S

show abstract

Tooth Microstructure and Replacement in the Gulper Shark,Centrophorus granulosus(Squaliformes: Centrophoridae)

Cited by 12 publications

References 20 publications

Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation?

Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation?

Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae)

Bite performance and feeding behaviour of the sand tiger sharkCarcharias taurus

Contact Info

Product

Resources

About