The erroneous chondrichthyan egg case assignments from the Devonian: implications for the knowledge on the evolution of the reproductive strategy within chondrichthyans

Mottequin, Bernard; Goolaerts, Stijn; Hunt, Adrian P.; Olive, Sébastien

doi:10.1007/s00114-021-01751-z

Cited by 3 publications

(3 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These discoveries led some to propose that viviparity was ancestral for chondrichthyans (Grogan & Lund, 2004, 2011; Musick & Ellis, 2005), a view that elicited alternative interpretations (e.g. Dulvy & Reynolds, 1997; Fischer et al ., 2014; Trinajstic et al ., 2019; Mottequin et al ., 2021). Evidence of oviparity is widespread among Paleozoic chondrichthyans, including some from older strata than the viviparous forms (Mottequin et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Dulvy & Reynolds, 1997; Fischer et al ., 2014; Trinajstic et al ., 2019; Mottequin et al ., 2021). Evidence of oviparity is widespread among Paleozoic chondrichthyans, including some from older strata than the viviparous forms (Mottequin et al ., 2021). Therefore, the appearance of a viviparous species in the Paleozoic (ca.…”

Section: Discussionmentioning

confidence: 99%

“…Cartilaginous fishes originated in the Paleozoic Era [541–252 million years ago (Mya)] and most major extant clades were established in the Mesozoic Era (251–66 Mya) (Guinot & Cavin, 2016; Heinicke, Naylor & Hedges, 2009; Long, Choo & Clement, 2019). Evidence for both oviparity and viviparity in Chondrichthyes extends back to the Carboniferous Period (359–299 Mya) (Grogan & Lund, 2011; Mottequin et al ., 2021). Consequently, chondrichthyan reproductive diversity is thought to reflect more than 400 million years of evolution (see Carrier, Pratt & Castro, 2004; Inoue et al ., 2010; Awruch, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phylogenetic analysis of viviparity, matrotrophy, and other reproductive patterns in chondrichthyan fishes

Blackburn,

Hughes

2024

Biological Reviews

View full text Add to dashboard Cite

The reproductive diversity of extant cartilaginous fishes (class Chondrichthyes) is extraordinarily broad, reflecting more than 400 million years of evolutionary history. Among their many notable reproductive specialisations are viviparity (live‐bearing reproduction) and matrotrophy (maternal provision of nutrients during gestation). However, attempts to understand the evolution of these traits have yielded highly discrepant conclusions. Here, we compile and analyse the current knowledge on the evolution of reproductive diversity in Chondrichthyes with particular foci on the frequency, phylogenetic distribution, and directionality of evolutionary changes in their modes of reproduction. To characterise the evolutionary transformations, we amassed the largest empirical data set of reproductive parameters to date covering nearly 800 extant species and analysed it via a comprehensive molecular‐based phylogeny. Our phylogenetic reconstructions indicated that the ancestral pattern for Chondrichthyes is ‘short single oviparity’ (as found in extant holocephalans) in which females lay successive clutches (broods) of one or two eggs. Viviparity has originated at least 12 times, with 10 origins among sharks, one in batoids, and (based on published evidence) another potential origin in a fossil holocephalan. Substantial matrotrophy has evolved at least six times, including one origin of placentotrophy, three separate origins of oophagy (egg ingestion), and two origins of histotrophy (uptake of uterine secretions). In two clades, placentation was replaced by histotrophy. Unlike past reconstructions, our analysis reveals no evidence that viviparity has ever reverted to oviparity in this group. Both viviparity and matrotrophy have arisen by a variety of evolutionary sequences. In addition, the ancestral pattern of oviparity has given rise to three distinct egg‐laying patterns that increased clutch (brood) size and/or involved deposition of eggs at advanced stages of development. Geologically, the ancestral oviparous pattern arose in the Paleozoic. Most origins of viviparity and matrotrophy date to the Mesozoic, while a few that are represented at low taxonomic levels are of Cenozoic origin. Coupled with other recent work, this review points the way towards an emerging consensus on reproductive evolution in chondrichthyans while offering a basis for future functional and evolutionary analyses. This review also contributes to conservation efforts by highlighting taxa whose reproductive specialisations reflect distinctive evolutionary trajectories and that deserve special protection and further investigation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phylogenetic analysis of viviparity, matrotrophy, and other reproductive patterns in chondrichthyan fishes

Blackburn,

Hughes

2024

Biological Reviews

View full text Add to dashboard Cite

show abstract

Revisiting the chondrichthyan egg capsules inventory from the Pennsylvanian (Carboniferous) of Belgium: new data and perspectives

Mottequin

Fischer²,

Goolaerts

et al. 2022

Sci Nat

View full text Add to dashboard Cite

An Oligocene chimaeroid egg capsule from western Washington State, USA, and priority of Vaillantoonia Meunier, 1891

Kiel,

Stevens,

Goedert

2024

J. Paleontol.

View full text Add to dashboard Cite

Fossil egg capsules of chimaeroids (holocephalian fishes), although rare, have been known for more than 150 years (Bessels, 1869; Meunier, 1891a) and have been found in rocks as old as Upper Triassic (Gottfried and Fordyce, 2014). Egg capsules of extant chimaeroids are spindle shaped, with a smooth central body where the embryo develops, an elongate anterior beak through which the hatchling emerges, and an elongate posterior pedicle. The capsules are flanked by a lateral membrane or web on both sides, and the web is reinforced with branching or unbranching rib-like costae that extend laterally from the central body, beak, and pedicle. Specimens are typically about 10–30 cm long. Egg capsules of extant chimaeroids are made of collagen (Hamlett et al., 2005) and as fossils, chimaeroid egg capsules are typically preserved as external casts (Fischer et al., 2014).

show abstract

The erroneous chondrichthyan egg case assignments from the Devonian: implications for the knowledge on the evolution of the reproductive strategy within chondrichthyans

Cited by 3 publications

References 50 publications

Phylogenetic analysis of viviparity, matrotrophy, and other reproductive patterns in chondrichthyan fishes

Phylogenetic analysis of viviparity, matrotrophy, and other reproductive patterns in chondrichthyan fishes

Revisiting the chondrichthyan egg capsules inventory from the Pennsylvanian (Carboniferous) of Belgium: new data and perspectives

An Oligocene chimaeroid egg capsule from western Washington State, USA, and priority of Vaillantoonia Meunier, 1891

Contact Info

Product

Resources

About