Structural and Functional Characterization of the Tongue and Digestive Tract of<i>Psammophis sibilans</i>(Squamata, Lamprophiidae): Adaptive Strategies for Foraging and Feeding Behaviors

El‐Mansi, Ahmed A.; Alkahtani, Mohammed Ali; Abumandour, Mohamed M. A.; Ahmed, Ahmed E.

doi:10.1017/s1431927620001312

Cited by 8 publications

(21 citation statements)

References 72 publications

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“…The narrow tapering shape of the tongue in A. boskianus may help to increase speed of protraction movement. Moreover, the forked tongue in A. boskianus may provide more surfaces available for sensory function during active searching as reported in Stenodactylus petrii (Darwish, 2012; El‐Mansi et al, 2020).…”

Section: Discussionmentioning

confidence: 82%

“…(Cooper, 1994) stated tongue‐flicking is the essential squamate behavior. The reptiles tongue serves as an environmental sampler and delivery device to the vomeronasal (Jacobson's) organ found in the roof of the mouth or in the nasal passages (El‐Mansi et al, 2020; Filoramo & Schwenk, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Disappearance of keratinization on the dorsal lingual epithelium is common feature in some reptiles (Abbate et al, 2010; Al‐Zahaby, Nasr, & Hassan, 2018; Herrel et al, 2005), while Wassif (2001) recognized that keratinization is represented at the tip of the tongue of Scincine Lizard, while El‐Mansi et al (2020) in Psammophis sibilans observed the dorsal and ventral lingual surface were covered by the kertainized material but the degree of keratinization reached to three times on the dorsal than the ventral lingual surface. Similar results were described by Iwasaki and Miyata (1985) and Iwasaki (1990) in Japanese lizard Gecko japonicas .…”

Section: Discussionmentioning

confidence: 99%

“…The tongue is considered a key innovation in the evolution of a terrestrial lifestyle as it allows animals to transport food items through the oral cavity (Abumandour & El‐Bakary, 2013; Abumandour & El‐Bakary, 2017b; Abumandour & El‐Bakary, 2019; Herrel, Canbek, Ozelmas, Uyanoglu, & Karakaya, 2005; Iwasaki, 2002; Meyers & Herrel, 2005). The tongue as a hyobranchial system has been coopted for a wide diversity of functions such as prey capture, drinking, breathing, and defensive behaviors (El‐Mansi, Al‐Kahtani, Abumandour, & Ahmed, 2020; Herrel, Timmermans, & De Vree, 1998; Iwasaki, 2002; Kuo, Munoz, & Irschick, 2019; McClung & Goldberg, 2000; Schwenk, 1995; Schwenk, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Among the vertebrates, the reptilian tongues are characterized by the presence of the morphological and functional variations among species that reflecting the various functions of each respective tongue (Cooper, 2003; Darwish, 2012; El‐Mansi et al, 2020; El‐Sayyad, Sabry, Khalifa, Abou‐El‐Naga, & Foda, 2011; Iwasaki, 2002). Many previous published descriptive studies were depending on the light microscopic examinations to investigate the structure of the tongue surface of the different reptile‐species such as (Abbate et al, 2010; Bayoumi, Abd‐Elhameed, & Mohamed, 2011; El‐Mansi et al, 2020; Mohammed, Mohallal, & Attia, 1998; Santos et al, 2011; Wassif & El‐ Hawary, 1998), these studies showed a great variety in the lingual morphology and histology, especially variation in the shape of the dorsal and ventral papillae. Apparently, the differences between the tongue surfaces of various reptiles depend on dissimilarities in the diet, the feeding habits, and the handling of the food in the oral cavity (Mohammed, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus

Gewily

Mahmoud

Saber

et al. 2021

Microscopy Res & Technique

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The current observations focused on the ultrastructure comparison between the tongue of two reptile species endemic the Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus to exhibit the relationship between the lingual epithelium and its function according to their specific feeding strategy. A. boskianus possessed triangular elongated tongue with bifurcated tapering apex and wide base while; the P. guttatus had a triangular flattened tongue with conical shallow bifurcated apex and broad base. The ventral surface of the lingual apex of A. boskianus had transverse while in P. guttatus had two oval pads and median ventral groove. Both surfaces of the tongue of both examined species are covered by stratified squamous epithelium with great variability of degree of keratinization. The dorsal epithelium formed flattened and conical filiform papillae in A. boskianus, while in P. guttatus formed cylindrical papillae, conical, and tall filiform ones. Few taste buds are observed on the fore‐tongue but increase on the mid‐tongue of A. boskianus, while in P. guttatus, numerous taste buds are distributed on the fore‐tongue and mid‐tongue. Both surfaces of the laryngeal mound of both examined species provided with numerous of cilia and orifices of laryngeal gland. The present results confirmed that the tongue of A. boskianus acts as a chemoreceptor organ to follow pheromone trails of prey and mates. While in P. guttatus the tongue may play an important role in the feeding mechanism and act as a chemoreceptor organ.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus

Gewily

Mahmoud

Saber

et al. 2021

Microscopy Res & Technique

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Oropharyngeal cavity floor morphology in Eretmochelys imbricata (Testudines: Cheloniidae) hatchlings and evolutionary implications

Oliveira

Attademo

Sousa

et al. 2022

The Anatomical Record

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Morphological studies of the oropharyngeal cavity of chelonians have become an interesting tool in the understanding of evolutionary processes associated with feeding habits in aquatic animals and the transition from aquatic to terrestrial forms. In this context, the aim of the present study was to describe the oropharyngeal cavity floor morphology of hawksbill sea turtle (Eretmochelys imbricata) hatchlings. Ten dead hatchlings of undefined sex were obtained from nests hatched on the coast of the state of Rio Grande do Norte, Brazil. The heads of each specimen were fixed, dissected, and analyzed at the macroscopic and microscopic levels. The oropharyngeal cavity floor of the hawksbill sea turtle hatchlings is formed by the tongue, pharynx, floor muscles, and hyolingual skeleton, delimited in the rostral and lateral directions by a keratinized beak, called the rhamphotheca, and in the caudal region at the limit between the pharynx and the esophagus. The tongue muscles and the muscles that support the floor of the oral cavity comprise the following: m. hypoglossohyoideus, m. hypoglossoglossus, m. hyoglossus, m. genioglossus, m. constrictor laryngis, m. geniohyoideus pars lateralis, and m. intermandibularis. The oropharyngeal cavity floor mucosa is

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Comparative histological and ultrastructural features of the tongue of the mallard domestic duck, Anas platyrhynchos f. domestica, Anatidae (Linnaeus, 1758) in different two age stages (post‐hatching [P2] and adult female) captured from Egypt

El‐Nahass,

Elwan

2024

Microscopy Res & Technique

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The domestic duck is classified as a specialist filter‐feeder bird living in the water. These birds also use grazing and pecking as terrestrial feeding methods. The tongues of domestic ducks, similar to those of other Anseriformes, exhibit numerous types and shapes of mechanical papillae that serve a number of purposes when collecting food. The current study attempts to describe the morphological characteristics of the tongue as well as the mechanical papillae's development. In addition, the study aims to determine whether the papillae observed post‐hatching (P2) exhibit similar morphology to those found in adult female avian species, as well as to investigate the readiness of the tongue to fulfill its feeding function following hatching. The comprehensive examination of lingual mucosa is examined about the structural modifications necessary for this variety of feeding activities. In this study, the tongues of nine young (P2) and adult female were used. The tongue had three distinct parts: the apex, which had a lingual nail on its ventral surface; the body, which exhibits numerous small and large conical papillae on its lateral sides and a lingual prominence in the caudal region; and the root, which is covered with numerous conical papillae of varying sizes. Conical, filiform, and hair‐like mechanical papillae, the three types of food filtration apparatus, are present in both stages. The intraoral transfer involves several structures, including the median groove, lingual combs, and the rostral border of the lingual prominence. The rostral border of the lingual prominence is characterized by distinct rows of conical papillae. The histological analysis demonstrated the presence of both keratinized and nonkeratinized epithelium on different tongue regions. The lingual salivary glands in the rostral and caudal lingual salivary glands exhibit a pronounced periodic acid–Schiff‐positive reaction. Additionally, the yellow adipose tissue and sensory receptors, namely the Grandry and Herbst corpuscles, which collectively form the bill‐tongue organ that monitors the movement of food. These results conclude the presence of microstructural species‐specific alterations in specific tongue areas of domestic ducks' lingual mucosa. These modifications are formed by the filtering mechanism and terrestrial feeding mechanisms, such as grazing or pecking. Following hatching, the tongue of the domestic duck undergoes significant development, primarily in preparation for grazing activities. The anatomical and histological structure of the young (P2) tongue exhibited similarities to that of the adult female domestic duck while also displaying certain variations that could potentially be attributed to the bird's habitat and mode of feeding.Research HighlightsThe results of this study concluded that the domestic duck exhibit a complex tongue structure characterized by the arrangement and morphology of its mechanical papillae, the presence of the lingual prominence with distinctive shape and the lingual comb. These features are believed to be adaptations that enable the duck to actively and efficiently filter food particles from water, serving as its primary feeding mechanism. Additionally, the tongue of domestic ducks is specifically adapted to facilitate various terrestrial activities, such as grazing and pecking. This adaptation is achieved through the presence of conical papillae and a lingual nail. These investigations facilitate our comprehension of both the anatomical and histological characteristics of the domestic duck tongue, as well as enhance our understanding of bird adaptations to various feeding mechanisms.

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Structural and Functional Characterization of the Tongue and Digestive Tract ofPsammophis sibilans(Squamata, Lamprophiidae): Adaptive Strategies for Foraging and Feeding Behaviors

Cited by 8 publications

References 72 publications

Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus

Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus

Oropharyngeal cavity floor morphology in Eretmochelys imbricata (Testudines: Cheloniidae) hatchlings and evolutionary implications

Comparative histological and ultrastructural features of the tongue of the mallard domestic duck, Anas platyrhynchos f. domestica, Anatidae (Linnaeus, 1758) in different two age stages (post‐hatching [P2] and adult female) captured from Egypt

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