• Abstract and Figures
• Public Full-text

Okajimas Folia Anat. Jpn., 93Lingual(3): 99–103, papillae November, of eland 201699 Morphology of the lingual papillae of the eland (Taurotragus oryx) By Shoichi EMURA Heisei College of Health Sciences, Gifu 501-1131, Japan –Received for Publication, September 2, 2016– Key Words: eland, lingual papillae, scanning electron microscopy Summary: We examined the dorsal lingual surfaces of an adult eland (Taurotragus oryx) by scanning electron microscopy. Filiform, fungiform and vallate papillae were observed. The filiform papillae of the lingual apex consisted of a larger main papilla and smaller secondary papillae. The connective tissue core of the filiform papilla was U-shaped. The fungiform papillae were round in shape. The connective tissue core of the fungiform papilla was flower-bud shaped. The filiform papillae of the lingual body consisted of a main papilla and were big as compared to that of the lingual apex. The connec- tive tissue core of the filiform papilla resembled that of the lingual apes. The lenticular papillae of large size were limited on the lingual prominence. The connective tissue core of the lenticular papilla consisted of numerous small spines. The vallate papillae were located on both sides of the posterolateral aspects. The vallate papillae were flattened-oval shaped and the papillae were surrounded by a semicircular trench. The connective tissue core of the vallate papilla was covered with numerous small spines. The lingual surface of the eland closely resembled that of the family Bovidae. Many studies have been published on the structures of the family Bovidae was used in this study. The tongue the lingual surfaces in various animals. In the order Artio- was fixed in 10% formalin. Small blocks containing dactyla, there have been many scanning electron micro- papillae were cut with a razor blade, post-fixed with 1% scopic (SEM) studies of the tongues of cows (Steflik et osmium tetroxide for 1 h. Thereafter, the specimens were al., 1983; Camorro,1986), serows (Funato et al., 1985; dehydrated through a graded series of acetone and criti- Atoji et al., 1998), one humped camels (Qayyum et al., cal-point-dried. To show the three-dimensional connec- 1988), buffalos (Scala et al., 1993), lesser mouse deer tive tissue structure of the lamina propria of the mucosa, (Agungpriyono et al., 1995), blackbuck (Emura et al., some of the samples were washed in distilled water after 1999), Barbary sheep (Emura et al., 2000a), Bactrian fixation and macerated in 3.5N HCl at 35°C for 2 days. camels (Eerdunchaolu et al., 2001), hippopotamuses After maceration, tissues were washed in the distilled (Yoshimura et al., 2009), sitatunga and roan antelope water and post-fixed in 1% osmium tetroxide for 1 h, and (Emura et al., 2011a,b) and Egyptian buffalo (Emura dehydrated in a series of acetone and critical-point-dried. and El-Bakary 2014). Such studies reveal variations in All specimens were sputtered with Pt-Pd before being morphology and distribution of papillae on the dorsal examined under SEM (Hitachi S-3000N, Tokyo, Japan) at lingual surface among animal species. an accelerating voltage of 10 kV. However, no SEM study on the tongue of the eland has been carried out. This study three-dimensionally examined the dorsal lingual surface of the eland, in order Results to compare results with those from previous reports on other mammals. General observations Macroscopically, the tongue of the eland was about 30 cm long and the lingual body had lingual prominence Materials and Methods on the posterior third (Fig. 1). Fungiform papillae were round in shape and more densely distributed as compared The tongue of an adult eland (Taurotragus oryx) of to those of the lingual body on the tip and ventral surface Corresponding author: Shoichi Emura, Heisei College of Health Sciences, Gifu 501-1131, Japan. 101-0061, Japan. E-mail: [email protected] 100 S. Emura of the lingual apex (Fig. 1). There was no foliate papilla. Scanning electron microscopy The filiform papillae of the lingual apex consisted of a main papilla and smaller secondary papillae (Fig. 2a). The connective tissue core of the filiform papilla was U-shaped (Fig. 2b). The fungiform papillae were round in shape (Fig. 2a). The connective tissue core of the fungi- form papilla was flower-bud shaped (Fig. 2b). The fili- form papillae of the lingual body consist of a main papilla and were big as compared to that of the lingual apex (Fig. 2c). The connective tissue core of the filiform papilla resembled that of the lingual apex (Fig. 2d). The lentic- ular papillae of large size were limited on the lingual prominence (Fig. 3a). The connective tissue core of the lenticular papilla consisted of numerous small spines (Fig. 3b). The vallate papillae were located on both sides of the posterolateral aspects. The vallate papillae were flattened-oval shaped and the papillae were surrounded by a semicircular trench (Fig. 3c). The connective tissue core of the vallate papilla was covered with numerous small spines (Fig. 3d). Discussion Agungpriyono et al. (1995) reported that filiform papillae consist of a larger main papilla and smaller secondary papillae, and in the filiform papillae that the distribution of the secondary papillae in the lesser mouse deer, being present from the anterior part of the tongue to the end of the middle third and rare or absent in the posterior part, is relatively restricted. Atoji et al. (1998) observed filiform papillae and conical papillae, and reported that the filiform papillae have secondary papillae in the Formosan serow. Emura et al. (1999, 2000a, 2011a, b) also observed similar filiform papillae in the black- buck, Barbary sheep, sitatunga and roan antelope. The filiform papillae of the eland in this study were morpho- Fig. 1. Macrograph of the eland tongue. A = lingual apex. B = lingual logically similar to those of the blackbuck, Barbary body. P = lingual prominence. V = vallate papilla. sheep, sitatunga and roan antelope (Emura et al., 1999, 2000a, 2011a, b). A top of the connective tissue cores of the filiform papillae distributed in the roan antelope’s The lenticular papillae of the various sizes were tongue showed several depressions (Emura et al., 2011b). limited on the lingual prominence of the sitatunga (Emura However, the connective tissue cores of the filiform et al., 2011a). The connective tissue core of the lentic- papillae of the sitatunga and eland did not show those ular papilla consisted of numerous small spines, or these depressions. spines and rod-shaped processes (Emura et al., 2011a). The fungiform papillae were more densely distributed The lenticular papillae of the eland were similar to those on the tip and ventral surface of the lingual apex in Japa- of the sitatunga . nese serow, Formosan serow, blackbuck, Barbary sheep, The vallate papillae surrounded by a groove was sitatunga and roan antelope and the papillae were smaller round or oval in shape (Funato et al., 1985; Atoji et al., than that of the body (Funato et al., 1985; Atoji et al., 1998). It was reported that a pair of long-flat vallate 1998; Emura et al., 1999, 2000a, 2011a, b). These reports papillae were observed in the lesser mouse deer tongue coincide with the findings on the eland. The connective (Agungpriyono et al., 1995). Equine vallate papillae tissue core of the fungiform papilla on the eland’s tongue were composed of a primary papilla which was divided was flower-bud shaped. into several secondary papillae by intermediate grooves Lingual papillae of eland 101 Fig. 2. Scanning electron micrographs of the lingual apex of the eland. (a) The filiform papilla on the apical surface consists of a main papilla and secondary papillae (arrows). The fungiform papillae (Fu) are round in shape. (b) The connective tissue core of the filiform papilla is U-shaped. The connective tissue core of the fungiform papilla (Fu) is flower-bud shaped. (c) The filiform papillae of the lingual body consist of a main papilla and are big as compared to that of the lingual apex. (d) The connective tissue core of the filiform papilla resembles that of the lingual apex. Fu = fungiform papilla. (Chamorro et al., 1986). In this study, the vallate papillae covered with numerous small spines and numerous were flattened-oval shaped. The connective tissue core slender processes delivered from the lateral surface of of the round central papilla in the Japanese serow was the surrounding wall (Yamaguchi et al., 2002). In this 102 S. Emura Fig. 3. Scanning electron micrographs of the lingual prominence of the eland. (a) Note the lenticular papillae of large size. (b) The connective tissue core of the lenticular papilla consisted of numerous small spines. (c) The vallate papillae (V) are located on both sides of the postero- lateral aspects. The vallate papillae are flattened-oval shaped and the papillae are surrounded by a semicircular trench. The connective tissue core of the vallate papilla is covered with numerous small spines. study, the connective tissue core of the vallate papilla was on the lateral sides of the lingual apex and body of the covered with numerous small spines. black rhinoceros had a hair-like shape, and consisted In the order Perissodactyla, the filiform papillae of main papillae and some smaller secondary papillae Lingual papillae of eland 103 (Emura et al., 2000b). The fungiform papillae were scat- Histol Embryol 2001; 30:147–151. tered among the hair-like papillae (Emura et al., 2000b). 6) Emura S and El-Bakary N.E.R. Morphology of the lingual papillae of Egyptian buffalo (Bubalus bubalis). Okajimas Folia Anat Jpn On the lingual apex of the donkey, the filiform papillae 20014; 91:13–17. were abundant with more or less slim cylindrical form 7) Emura S, Okumura T and Chen H.

Load more

  5

Copy Link