Main airway throughout the nasal cavity of green sea turtles is lined by keratinized stratified squamous epithelium

Kondoh, Daisuke; Kitayama, Chiyo; Aiko, Yuki; Yamaguchi, Yohei

doi:10.1016/j.tice.2020.101370

Cited by 5 publications

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“…The main portion of the nasal cavity of turtles in general comprises dorsal and ventral diverticula (Bartol & Musick, 2003; Nakamuta, Nakamuta, et al, 2016; Nakamuta, Yokosuka, et al, 2016; Parsons, 1959; Schwenk, 2008; Taniguchi & Taniguchi, 2014). On the other hand, we reported that the nasal cavity of juvenile green sea turtles has a characteristic middle portion that comprises anterodorsal, anteroventral and posterodorsal diverticula and a posteroventral excavation (Kondoh et al, 2019, 2020). These four structures were also evident in the nasal cavity of an adult green sea turtle, indicating that these features persist throughout life in green sea turtles.…”

Section: Discussionmentioning

confidence: 99%

“…The nasal cavity of terrestrial and semi‐aquatic turtles is separated into two diverticula by several grooves or fossae (Bartol & Musick, 2003; Nakamuta, Nakamuta, Kato, & Yamamoto, 2016; Nakamuta, Yokosuka, Taniguchi, Yamamoto, & Nakamuta, 2016; Parsons, 1959; Schwenk, 2008; Taniguchi & Taniguchi, 2014), whereas that of sea turtles is more complicated (Parsons, 1968; Saito, Shoji, Uchida, & Ueda, 2000; Schwenk, 2008). We recently described four distinctive structures, namely anterodorsal, anteroventral and posterodorsal diverticula and a posteroventral excavation, in the nasal cavity of juvenile green sea turtles in detail (Kondoh et al, 2019; Kondoh, Kitayama, Aiko, & Yamaguchi, 2020). However, whether the nasal cavities of other sea turtle species are structurally similar remains unknown.…”

Section: Introductionmentioning

confidence: 99%

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Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Yamaguchi

Kitayama²,

Tanaka³

et al. 2020

The Anatomical Record

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The morphology of the tetrapod nasal cavity has adapted to the environment in terms of olfaction and respiration. Reports indicate that the internal structure of the nasal cavity of green sea turtles is more complex than that of turtles in general, but whether or not it is similar among sea turtle species remains unknown. The present study aimed to define the internal structures of the nasal cavity of green (Chelonian mydas), loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles using computed tomography. The nasal cavity of green and loggerhead sea turtles contained anterodorsal, anteroventral, posterodorsal diverticula and a posteroventral excavation in the middle. In contrast, the nasal cavity of leatherback sea turtles had more complicated dorsal region comprising anterodorsal and posterodorsal diverticula, and two excavations between the nostril and anterodorsal diverticulum, but no distinct structures at the ventral region. The airway in the nasal cavity was shorter and thicker in the leatherback, than in the green and loggerhead turtles. These species differences might reflect ecological variety and different evolutionary strategies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Yamaguchi

Kitayama²,

Tanaka³

et al. 2020

The Anatomical Record

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“…The histological features of the nasal cavity in juvenile green turtles have been detailed (Kondoh et al, 2019(Kondoh et al, , 2020. The AdD and AvD are lined by continuous sensory epithelium without associated glands (ADs epithelium), whereas the PvF is covered independently by a similar sensory epithelium (PvF epithelium).…”

Section: Introductionmentioning

confidence: 99%

Histological features and Gα_olf expression patterns in the nasal cavity of sea turtles

et al. 2023

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Sea turtles use olfaction to detect volatile and water‐soluble substances. The nasal cavity of green turtles (Chelonia mydas) comprises morphologically defined the anterodorsal, anteroventral, and posterodorsal diverticula, as well as a single posteroventral fossa. Here, we detailed the histological features of the nasal cavity of a mature female green turtle. The posterodorsal diverticulum contained spongy‐like venous sinuses and a wave‐shaped sensory epithelium that favored ventilation. Secretory structures that were significant in sensory and non‐sensory epithelia were probably involved in protection against seawater. These findings suggested that green turtles efficiently intake airborne substances and dissolve water‐soluble substances in mucous, while suppressing the effects of salts. In addition, positive staining of Gαs/olf that couples with olfactory, but not vomeronasal, receptors was predominant in all three types of sensory epithelium in the nasal cavity. Both of airborne and water‐soluble odorants seemed to be detected in cells expressing Gαolf and olfactory receptors.

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“…Sea turtles can detect volatile and water-soluble odorants with high sensitivity [6][7][8][9]. We previously described the morphological and histological features of the nasal cavities of green sea turtles [10,11]. The nasal cavity comprises the vestibule, cavum nasi proprium, and nasopharyngeal duct [12].…”

Section: Introductionmentioning

confidence: 99%

Morphological features of the nasal cavities of hawksbill, olive ridley, and black sea turtles: Comparative studies with green, loggerhead and leatherback sea turtles

Kitayama¹,

Omata

Tomita

et al. 2021

PLoS ONE

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We analyzed the internal structure of the nasal cavities of hawksbill, olive ridley and black sea turtles from computed tomography images. The nasal cavities of all three species consisted of a vestibule, nasopharyngeal duct and cavum nasi proprium that included anterodorsal, posterodorsal and anteroventral diverticula, and a small posteroventral salience formed by a fossa of the wall. These findings were similar to those of green and loggerhead sea turtles (Cheloniidae), but differed from those of leatherback sea turtles (Dermochelyidae). Compared to the Cheloniidae species, the nasal cavity in leatherback sea turtles was relatively shorter, wider and larger in volume. Those structural features of the nasal cavity of leatherback sea turtles might help to suppress heat dissipation and reduce water pressure within the nasal cavity in cold and deep waters.

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Main airway throughout the nasal cavity of green sea turtles is lined by keratinized stratified squamous epithelium

Cited by 5 publications

References 9 publications

Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Histological features and Gα_olf expression patterns in the nasal cavity of sea turtles

Morphological features of the nasal cavities of hawksbill, olive ridley, and black sea turtles: Comparative studies with green, loggerhead and leatherback sea turtles

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Main airway throughout the nasal cavity of green sea turtles is lined by keratinized stratified squamous epithelium

Cited by 5 publications

References 9 publications

Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Computed tomographic analysis of internal structures within the nasal cavities of green, loggerhead and leatherback sea turtles

Histological features and Gαolf expression patterns in the nasal cavity of sea turtles

Morphological features of the nasal cavities of hawksbill, olive ridley, and black sea turtles: Comparative studies with green, loggerhead and leatherback sea turtles

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Histological features and Gα_olf expression patterns in the nasal cavity of sea turtles