An intermediate stage in the development of the skull of syngnathus fuscus

Kindred, James E.

doi:10.1002/aja.1000330302

Cited by 9 publications

(11 citation statements)

References 3 publications

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“…Gregory (1933) states that Phyllopteryx is in possession of ''a row of antorbital plates on the side of the oral tube'', which he labels as two metapterygoid bones. As previously mentioned, Kindred (1924) and De Beer (1937) maintained that the lacrimal bone in S. fuscus is the metapterygoid bone, although they correctly pointed out that the second infraorbital bone is a circumorbital bone. Kadam (1961) described the two bones of the suborbital chain in Nerophis as an anterior preorbital bone and a posterior suborbital bone and he remarked that in Syngnathus and Hippocampus there are two preorbital bones.…”

Section: Bone Terminologiesmentioning

confidence: 94%

“…In the current deficiency of conclusive ontogenetic evidence to elucidate this, the terms ''dentary bone'' and ''anguloarticular bone'' are used here. Kindred (1924) suggested there is a pterygoid bone in S. fuscus, which would be a fusion of the ectopterygoid and the endopterygoid bones. According to Kadam (1961) the ectopterygoid and the endopterygoid bones ossify separately in Nerophis (species not stated), S. serratus and Hippocampus (species not stated).…”

Section: Bone Terminologiesmentioning

confidence: 99%

“…In S. rostellatus and H. capensis we found no indications of an endopterygoid bone. As Kadam (1961) correctly pointed out, the bone that Kindred (1924) describes as the pterygoid bone consists as two separate elements and one of them is indeed the dermal ectopterygoid bone. However, he did not notice that the bone he called the endopterygoid bone is perichondral, and therefore homologous to a metapterygoid bone.…”

Section: Bone Terminologiesmentioning

confidence: 99%

“…However, he did not notice that the bone he called the endopterygoid bone is perichondral, and therefore homologous to a metapterygoid bone. Bergert and Wainwright (1997) followed Kindred (1924) in identifying the metapterygoid bone of S. floridae as the entopterygoid bone. In addition, they did not mention the presence of a similar bone in H. erectus.…”

Section: Bone Terminologiesmentioning

confidence: 99%

“…As Branch (1966) mentioned, the homology of the circumorbital bones has been unclear. Kindred (1924), and De Beer (1937), defined the metapterygoid bone of S. fuscus as ''the intramembranous ossification dorsal to the quadrate, rostral to the symplectic, and excluded from contact with the metapterygoid process of the palatoquadrate by the pterygoid''. However, Kadam (1961), Branch (1966), and Patterson (1977 pointed out this is not the metapterygoid bone, but the lacrimal bone.…”

Section: Bone Terminologiesmentioning

confidence: 99%

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Cranial architecture of tube‐snouted gasterosteiformes (Syngnathus rostellatus and Hippocampus capensis)

Leysen

Jouk

Brunain

et al. 2009

Journal of Morphology

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The long snout of pipefishes and seahorses (Syngnathidae, Gasterosteiformes) is formed as an elongation of the ethmoid region. This is in contrast to many other teleosts with elongate snouts (e.g., butterflyfishes) in which the snout is formed as an extension of the jaws. Syngnathid fishes perform very fast suction feeding, accomplished by powerful neurocranial elevation and hyoid retraction. Clearly, suction through a long and narrow tube and its hydrodynamic implications can be expected to require certain adaptations in the cranium, especially in musculoskeletal elements of the feeding apparatus. Not much is known about which skeletal elements actually support the snout and what the effect of elongation is on related structures. Here, we give a detailed morphological description of the cartilaginous and bony feeding apparatus in both juvenile and adult Syngnathus rostellatus and Hippocampus capensis. Our results are compared with previous morphological studies of a generalized teleost, Gasterosteus aculeatus. We found that the ethmoid region is elongated early during development, with the ethmoid plate, the hyosymplectic, and the basihyal cartilage being extended in the chondrocranium. In the juveniles of both species almost all bones are forming, although only as a very thin layer. The elongation of the vomeral, mesethmoid, quadrate, metapterygoid, symplectic, and preopercular bones is already present. Probably, because of the long and specialized parental care which releases advanced developmental stages from the brooding pouch, morphology of the feeding apparatus of juveniles is already very similar to that of the adults. We describe morphological features related to snout elongation that may be considered adaptations for suction feeding; e.g. the peculiar shape of the interhyal bone and its saddle‐shaped articulation with the posterior ceratohyal bone might aid in explosive hyoid retraction by reducing the risk of hyoid dislocation. J. Morphol., 2010. © 2009 Wiley‐Liss, Inc.

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Section: Bone Terminologiesmentioning

confidence: 94%

Section: Bone Terminologiesmentioning

confidence: 99%