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Studies on the Os Nasocavorum of Order Anura and Anatomy and Comparison of the Skeletal System of Three Kinds of Frogs

Author: WuHuiFang
Tutor: LiuShaoLong
School: Sichuan University
Course: Zoology
Keywords: Anura Skeletal system Nasal bone Green Odorrana Limnocharis Bark frog
CLC: Q954
Type: Master's thesis
Year: 2007
Downloads: 100
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Making the Green Odorrana Hylarana (Odorrana) margaretae skeletal system anatomy, an unknown bones, and then observe the big green frog H. livida marsh frog Rana guentheri other types of have this bone. Access to literature, Wu Guan-fu in the frog Rana rugosa bark skeletal system reported to the bone, and was named the nasal bone os nasocavorum. Following, we in China Anura Anura the bombesin Branch Bombinidae Megophryidae Megophryidae, Bufonidae Bufonidae, Hylidae tree frogs Branch, Microhylidae, Ji Ranidae the fork tongue Ranidae Dicroglossidae,, frog family Ranidae, of tree frog Division Rhacophoridae 8 families in more than 80 of the 58 representative specimens were systematically studied and found that these specimens there is a nasal bone, and their position is basically the same, so that the bones should be Anura animal bones a total of homology. According to the location of the nasal bone, can be divided into three categories: a nasal bone is located in the outer edge of the nostril, constituting the framework of the hemi-apertures in the outer nostrils (Bombina orientalis Bombina orientalis Boulenger); Second, the nasal bone is located in front of the nostril under, the separation of the base end side toward the two (Bufo toad Bufo gargarizans Contor Minshan toad B.minshanicus of Boulenger); nasal bone located between the bottom of the front side of the nostrils and upper jaw, the base end of the cartilage piece solid knot in the front inside edge of the maxilla (other types). According to the morphological structure of the nasal bone, can be divided into six types: type I, type II, type III, type IV and type V and VI type. Type I - V-nasal bone morphogenetic intermittent, the difference is obvious, easy to identify with the bombesin Branch Bombinidae,, Megophryidae Megophryidae, Bufonidae Bufonidae Hylidae tree frogs Division, Ji Ranidae Microhylidae current without objection, just 5 section-level taxon is one-to-one correspondence. Type VI includes 46 species in the Ranidae Ranidae the tree frog Branch Rhacophoridae, and the fork tongue Ranidae Dicroglossidae, three subjects. This taxon in most types of nasal bone structure is relatively simple, only the tiger frog Limnonectes rugulosa Fitginger, 1843 and the spine boulengeri PAA boulengeri Günther, 1889 two more complex. Green Odorrana H. The skeletal system margaretae comparative anatomy, and limnocharis L. limnocharis bark frog R. rugosa skeletal system of observation and comparison, the results showed that the: frog mandibular arch, tongue, throat cartilage, the constructor of the phalanges not significantly different; # 8 pieces of the vertebral body are double concave, is varied spine; Green smelly frog, the bark frog strap solid breast shape, and strap limnocharis is not completely solid breast shape; shoulder sternum the base green Odorrana is complete, bark frog in the center or deep or shallow notch , the shoulder limnocharis sternum forked; sword trailing edge of the sternum, in limnocharis is complete, shallow notch in the bark frog, Green Odorrana forked; three kinds of nasal bone, nasal bone each other difference; butterfly sieve bone, green smelly frog and rough skin frog similar and larger difference with limnocharis; tumor under the joint being below, bark frog is no obvious change in the position, in green smelly frog joint at the obvious enlargement, under their joint significant tumor limnocharis free small bone at that location.

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