Comparative Morphology of the Internal Nasal Skeleton of Adult Marsupials Based on X-ray Computed Tomography

Macrini, Thomas E.

doi:10.1206/365.1

Cited by 59 publications

(116 citation statements)

References 85 publications

(195 reference statements)

Supporting

Mentioning

111

Contrasting

Order By: Relevance

“…The architecture of the turbinals and floor of the nasal capsule determines whether orthonasal and/or retronasal air currents pass directly over olfactory epithelium. Turbinals are highly variable between mammalian clades, and only recently has 3D imaging made morphological analysis possible (Van Valkenburgh et al, 2004; Rowe et al, 2005; Smith et al, 2011; Eiting et al, 2015), and shown that they preserve phylogenetic (Macrini, 2012) and ecological (Van Valkenburgh et al, 2011) signals.…”

Section: Resultsmentioning

confidence: 99%

Role of ortho‐retronasal olfaction in mammalian cortical evolution

Rowe

Shepherd

2015

J of Comparative Neurology

View full text Add to dashboard Cite

Fossils of mammals and their extinct relatives among cynodonts give evidence of correlated transformations affecting olfaction as well as mastication, head movement, and ventilation, and suggest evolutionary coupling of these seemingly separate anatomical regions into a larger integrated system of ortho-retronasal olfaction. Evidence from paleontology and physiology suggests that ortho-retronasal olfaction played a critical role at three stages of mammalian cortical evolution: early mammalian brain development was driven in part by ortho-nasal olfaction; the bauplan for neocortex had higher-level association functions derived from olfactory cortex; and human cortical evolution was enhanced by ortho-retronasal smell.

show abstract

Section: Resultsmentioning

confidence: 99%

Role of ortho‐retronasal olfaction in mammalian cortical evolution

Rowe

Shepherd

2015

J of Comparative Neurology

View full text Add to dashboard Cite

show abstract

“…Broom subdivided the mammals into two on the basis of the presence or absence of the mesethmoid in his trilogy, Palaeotherida (which have no mesethmoid) and Neotherida (with the mesethmoid; Broom, ), including monotremes, marsupials, edentates (=xenarthrans), pholidotans, artiodactyls, perissodactyls, Chrysochloris (Afrosolicida), proboscideans, and sirenians as Palaeotherida, and tubulidentates, hyracoids, rodents, “insectivorans,” carnivorans, chilopterans, dermopterans, primates, and menotyphlans (=macroscelideans and scandentians) as Neotherida. Major doubts surround Broom's concept of the two mammalian groups, however, from the modern‐day molecular and morphological standpoints (Shoshani and McKenna, ; Wible and Gaudin, ; Nishihara et al, ; Meredith et al, ; Macrini, ; O'Leary et al, ; Fig. ), and I also hesitate to accept it as it is.…”

Section: Discussionmentioning

confidence: 99%

The ethmoid and presphenoid of cetaceans

Ichishima

2016

Journal of Morphology

View full text Add to dashboard Cite

A cribriform plate, a perpendicular plate, and two lateral masses are major components of the ethmoid bone of mammals. Notwithstanding the noticeable bone, virtually sitting in the center of the skull, extensive modifications of the skull of modern cetaceans, especially odontocetes (toothed whales), and the lack of clarity as to what characteristics delimit each element of the ethmoid has made the problem of the nature of the cetacean ethmoid more complicated and elusive than in other, less modified mammals. Furthermore, contention as to whether a perpendicular plate of the ethmoid, or the mesethmoid, exists in all mammals including cetaceans has remained unsettled. In odontocetes, the mesethmoid has been variably identified not only as the osseous nasal septum but also as the mediodorsal region of the posterior wall of the nasal passage below the nasals, as a mass of bone encased by the vomer in front of the osseous nasal cavity at the base of the rostrum, and as a combination of some portions mentioned above. The presence or absence of the mesethmoid in various groups of mammals has attracted the attention of some biologists, and here, I demonstrate that cetaceans have no mesethmoid. The close inspection of the ontogenetic changes of the basicranial elements in cetaceans reveals that a mass of bone ensheathed by the vomer in front, or at the level of the osseous nasal cavity is actually the presphenoid. It is highly likely that in odontocetes the posterior wall of the nasal passages below the nasals consists of the combination of the frontal, the imperforated cribriform plate, the paired ectethmoids, and the vomer, the latter three of which partially concealing the presphenoid dorsally and laterally as the ontogeny proceeds. In contrast, mysticetes clearly display ethmoturbinates and a cribriform plate, which are morphologically similar to those in terrestrial mammals. J. Morphol. 277:1661-1674, 2016. © 2016 Wiley Periodicals, Inc.

show abstract

“…Alcidedorbignya presents two frontoturbinals (ectoturbinals) a condition also present in didelphids (Caluromys [Macrini 2012[Macrini , 2014 and Monodelphis [Rowe et al 2005]), Leptictis, tenrecoids, erinaceomorphs, and soricomorphs. Two frontoturbinals probably represent the plesiomorphic condition for eutherians (Novacek , 1993.…”

Section: Character 165)mentioning

confidence: 99%

Alcidedorbignya inopinata, a basal pantodont (Placentalia, Mammalia) from the early Palaeocene of Bolivia: anatomy, phylogeny and palaeobiology

et al. 2015

View full text Add to dashboard Cite

Alcidedorbignya inopinata Muizon & Marshall, 1987 is a basal pantodont (Placentalia, Mammalia) of small body size, from the early Palaeocene of the Santa Lucia Formation at Tiupampa, Bolivia. Tiupampa is the type locality for the Tiupampan, a South American Land Mammal age (SALMA), which is assigned an age equivalent to the basal Torrejonian 1 of North America (c. 65 Ma). Alcidedorbignya is known by exceptionally preserved specimens, which are described here. The two major specimens are an almost complete skeleton (MHNC 8372) and a partial skull (MHNC 8399), the former representing one of the best-preserved fossil placentals from the early Palaeocene and probably the oldest placental skeleton that is so completely known. These specimens are also the first eutherian skulls and skeleton ever discovered at Tiupampa, a locality which has yielded numerous metatherian skulls and partial skeletons. The remarkable preservation of the two skulls allows a detailed description of the cranial anatomy with well-identified sutures and foramina, including those of the auditory region. Through CT scanning of the skulls, the arterial and venous circulation pattern in the basicranium as well as the bony labyrinth of the inner ear were tentatively reconstructed. A thorough description of the postcranial skeleton of MHNC 8372 is also provided. Among pantodonts, Alcidedorbignya presents the closest morphological similarities with Pantolambda, the oldest and earliest diverging North American pantodont (known by skulls and skeletons), from the late early Palaeocene (Torrejonian 2 and 3) of New Mexico. Alcidedorbignya is one-third the size, much more gracile, and clearly exhibits more plesiomorphic features than Pantolambda. It is also at least 3 Ma older. Interesting similarities are also observed between the skull of Alcidedorbignya and several "condylarths", such as Maiorana, Baioconodon, Arctocyon, and Arctocyonides. The basicranium of Alcidedorbignya is also similar to that of some extant afrotheres (e.g., Tenrec) or Lipotyphla (e.g., 398GEODIVERSITAS • 2015 • 37 (4) Muizon C. de et al. Solenodon), but most of these similarities may represent placental symplesiomorphies. In fact, the cranial anatomy of Alcidedorbignya, beyond the simple thorough description of a basal pantodont, sheds light on the cranial anatomy of placentals from the earliest Paleocene, previously unknown in this detail. The postcranial skeleton of MHNC 8372 together with some isolated specimens referred to A. inopinata, is compared to adequate morphofunctional models (e.g., Solenodon, Dendrohyrax, Sciurus), which indicates that it was a moderately agile, plantigrade, generalized terrestrial mammal with good climbing ability (scansorial) and occasionally capable of standing in a bipedal position. The scutiform ungual phalanges were probably bearing nail-like hooves (or primate-like nails) and because of the absence of claws, fossorial habits are unlikely.A parsimony analysis of a data matrix including 72 taxa and 426 characters (cranial and postcranial...

show abstract

Comparative Morphology of the Internal Nasal Skeleton of Adult Marsupials Based on X-ray Computed Tomography

Cited by 59 publications

References 85 publications

Role of ortho‐retronasal olfaction in mammalian cortical evolution

Role of ortho‐retronasal olfaction in mammalian cortical evolution

The ethmoid and presphenoid of cetaceans

Alcidedorbignya inopinata, a basal pantodont (Placentalia, Mammalia) from the early Palaeocene of Bolivia: anatomy, phylogeny and palaeobiology

Contact Info

Product

Resources

About