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Chioninia Coctei MUSE
__NOTOC__ ''Chioninia'' is a genus of skinks, lizards in the subfamily Lygosominae. For long, this genus was included in the "wastebin taxon" ''Mabuya''. The genus ''Chioninia'' contains the Cape Verde mabuyas. Description Species in the genus ''Chioninia'' are mid-sized to largish lizards with cylindrical bodies, tails of medium length, and well-developed arms and legs; the hands and feet have 5 toes each. Their cycloid scales are underlaid by osteoderms. The scales on the back and belly are similar in shape, but those on the back are keeled. The scales on the top of the head are generally flat and subimbricate; they have a pair of supranasal scales and the frontoparietal and prefrontal scales are paired or fused. The third supraocular scale is the hindmost one that contacts the frontal scale, and the secondary temporal scales touch each other. The nasal scale is undivided. ''Chioninia'' mabuyas have 26–27 presacral vertebrae. Their palatine bones are in contact with the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaillant's Mabuya
''Chioninia vaillantii'', also known Common name, commonly as Vaillant's mabuya or Vaillant's skink, is a species of skink in the Family (biology), family Scincidae. The species is Endemism, endemic to the Cape Verde Islands. There are two recognized subspecies. Conservation status ''C. vaillantii'' is listed as endangered by the IUCN because the species occurs as a very fragmented population, and the quality of its habitat is declining. Geographic range Vaillant's mabuya occurs on the islands Fogo, Cape Verde, Fogo and Santiago, Cape Verde, Santiago, and the islet Ilhéu de Cima. Habitat The preferred natural habitat of ''C. vaillantii'' is shrubland. Reproduction ''C. vaillantii'' is Viviparity, viviparous. Subspecies Two subspecies are recognized as being valid including the nominotypical subspecies. *''Chioninia vaillantii vaillantii'' *''Chioninia vaillantii xanthotis'' ''Nota bene'': A Trinomen, trinomial authority in parentheses indicates that the subspecies was origi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supraocular
In scaled reptiles, supraocular scales are (enlarged) scales on the crown immediately above the eye.Mallow D, Ludwig D, Nilson G. 2003. True Vipers: Natural History and Toxinology of Old World Vipers. Malabar, Florida: Krieger Publishing Company. 359 pp. . The size and shape of these scales are among the many characteristics used to differentiate species from each another. In many species of boids and viperids, the supraoculars are heavily fragmented. In others, such as the colubrids and elapids, they are enlarged. See also * Ocular scales * Snake scales * Anatomical terms of location Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position pro ... References {{Reflist Snake scales ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chioninia Coctei
''Chioninia coctei'' (also called Bibron's skink, the Cape Verde giant skink, Cocteau's skink, and ''lagarto'' in Portuguese) was a species of lizard that was at one time known to inhabit the islets of Ilhéu Branco, Branco and Ilhéu Raso, Raso in the Cape Verde islands of the Atlantic Ocean, islets rendered deserts by human-caused habitat destruction. None has been observed since the early 20th century, and the species was officially declared extinct in 2013. Taxonomy The Specific name (zoology), specific name, ''coctei'', is in honor of French people, French physician and Zoology, zoologist Jean-Théodore Cocteau, Jean Théodore Cocteau (1798–1838). It has been found through mitochondrial Nucleic acid sequence, DNA sequences that ''C. coctei'' was most closely related to the skink genus ''Mabuya''. Description ''C. coctei'' was very large for a skink. Adults could attain a Snout–vent length, snout-to-vent length (SVL) of , and the cylindrical tail was as long as the hea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Canal
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about in length and in diameter. Structure The human ear canal is divided into two parts. The elastic cartilage part forms the outer third of the canal; its anterior and lower wall are cartilaginous, whereas its superior and back wall are fibrous. The cartilage is the continuation of the cartilage framework of pinna. The cartilaginous portion of the ear canal contains small hairs and specialized sweat glands, called apocrine glands, which produce cerumen ( ear wax). The bony part forms the inner two thirds. The bony part is much shorter in children and is only a ring (''annulus tympanicus'') in the newborn. The layer of epithelium encompassing the bony portion of the ear canal is much thinner and therefore, more sensitive in comparison to the cartilaginous portion. Size and sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eardrum
In the anatomy of humans and various other tetrapods, the eardrum, also called the tympanic membrane or myringa, is a thin, cone-shaped membrane that separates the external ear The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. It gathers sound energy and focuses it on the eardrum (tympanic membrane). Structure Auricle The ... from the middle ear. Its function is to transmit sound from the air to the ossicles inside the middle ear, and then to the oval window in the fluid-filled cochlea. Hence, it ultimately converts and amplifies vibration in the air to vibration in cochlear fluid. The malleus bone bridges the gap between the eardrum and the other ossicles. Rupture or perforation of the eardrum can lead to conductive hearing loss. Collapse or tympanic membrane retraction, retraction of the eardrum can cause conductive hearing loss or cholesteatoma. Structure Orientation and r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodont
Pleurodont is a form of tooth implantation common in reptiles of the order Squamata, as well as in at least one temnospondyl. The labial (cheek) side of pleurodont teeth are fused (ankylosed) to the inner surface of the jaw bones which host them. The lingual (tongue) side of pleurodont teeth are not attached to bone, and instead are typically held in place by connective ligaments. This contrasts with thecodont Thecodontia (meaning 'socket-teeth'), now considered an obsolete taxonomic grouping, was formerly used to describe a diverse "order" of early archosaurian reptiles that first appeared in the latest Permian period and flourished until the end of th ... implantation, in which the teeth are set in sockets and surrounded by bone on all sides. References External links Tooth Implantation at palaeos.comOral Cavity of Reptiles - Anatomy and Physiology Dentition types Reptile anatomy {{Vertebrate anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterygoid Processes Of The Sphenoid
The pterygoid processes of the sphenoid (from Greek ''pteryx'', ''pterygos'', "wing"), one on either side, descend perpendicularly from the regions where the body and the greater wings of the sphenoid bone unite. Each process consists of a medial pterygoid plate and a lateral pterygoid plate, the latter of which serve as the origins of the medial and lateral pterygoid muscles. The medial pterygoid, along with the masseter allows the jaw to move in a vertical direction as it contracts and relaxes. The lateral pterygoid allows the jaw to move in a horizontal direction during mastication (chewing). Fracture of either plate are used in clinical medicine to distinguish the Le Fort fracture classification for high impact injuries to the sphenoid and maxillary bones. The superior portion of the pterygoid processes are fused anteriorly; a vertical groove, the pterygopalatine fossa, descends on the front of the line of fusion. The plates are separated below by an angular cleft, the pt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenopalatine Notch
The sphenopalatine foramen is a foramen in the skull that connects the nasal cavity with the pterygopalatine fossa. Structure The processes of the superior border of the palatine bone are separated by the ''sphenopalatine notch'', which is converted into the sphenopalatine foramen by the under surface of the body of the sphenoid. In the articulated skull this foramen leads from the pterygopalatine fossa into the posterior part of the superior meatus of the nose, and transmits the sphenopalatine artery and vein and the posterior superior lateral nasal nerve and nasopalatine nerve The nasopalatine nerve (long sphenopalatine nerve) is a nerve of the head. It is a branch of the pterygopalatine ganglion, a continuation from the maxillary nerve (V2). It supplies parts of the palate and nasal septum. Structure The nasopalati ...s. Additional images File:Gray167.png, Articulation of left palatine bone with maxilla. File:Gray168.png, Left palatine bone. Nasal aspect. Enlarged. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Median (other)
Median may refer to: Mathematics and statistics * Median (statistics), in statistics, a number that separates the lowest- and highest-value halves * Median (geometry), in geometry, a line joining a vertex of a triangle to the midpoint of the opposite side * Median (graph theory), a vertex m(a,b,c) that belongs to shortest paths between each pair of a, b, and c * Median algebra, an algebraic triple product generalising the algebraic properties of the majority function * Median graph, undirected graph in which every three vertices a, b, and c have a unique median * Geometric median, a point minimizing the sum of distances to a given set of points People * Median (rapper), a rapper from the U.S. city of Raleigh, North Carolina Science and technology * Median (biology), an anatomical term of location, meaning at or towards the central plane of a bilaterally symmetrical organism or structure * Median filter, a nonlinear digital filtering technique used to reduce noise in images * M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palatine Bone
In anatomy, the palatine bones () are two irregular bones of the facial skeleton in many animal species, located above the uvula in the throat. Together with the maxillae, they comprise the hard palate. (''Palate'' is derived from the Latin ''palatum''.) Structure The palatine bones are situated at the back of the nasal cavity between the maxilla and the pterygoid process of the sphenoid bone. They contribute to the walls of three cavities: the floor and lateral walls of the nasal cavity, the roof of the mouth, and the floor of the orbits. They help to form the pterygopalatine and pterygoid fossae, and the inferior orbital fissures. Each palatine bone somewhat resembles the letter L, and consists of a horizontal plate, a perpendicular plate, and three projecting processes—the pyramidal process, which is directed backward and lateral from the junction of the two parts, and the orbital and sphenoidal processes, which surmount the vertical part, and are separated by a dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertebra
The spinal column, a defining synapomorphy shared by nearly all vertebrates,Hagfish are believed to have secondarily lost their spinal column is a moderately flexible series of vertebrae (singular vertebra), each constituting a characteristic irregular bone whose complex structure is composed primarily of bone, and secondarily of hyaline cartilage. They show variation in the proportion contributed by these two tissue types; such variations correlate on one hand with the cerebral/caudal rank (i.e., location within the backbone), and on the other with phylogenetic differences among the vertebrate taxa. The basic configuration of a vertebra varies, but the bone is its ''body'', with the central part of the body constituting the ''centrum''. The upper (closer to) and lower (further from), respectively, the cranium and its central nervous system surfaces of the vertebra body support attachment to the intervertebral discs. The posterior part of a vertebra forms a vertebral arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Presacral
In human anatomy, the presacral space is inside the pelvis, behind the rectum and in front of the coccyx and sacrum. Normally it is empty, or it contains a pocket of fat. It is usually covered by sigmoid colon. Clinical significance The presacral space may contain one of several kinds of tumor. The most common tumor here is sacrococcygeal teratoma. Others are retrorectal hamartoma (tailgut cyst), schwannoma, ganglioneuroma, and ependymoma. Also sometimes found here is an anterior Spina bifida#Meningocele, meningocele, a relatively mild form of neural tube defect. Causes of increased pre-sacral space are: ulcerative colitis, Crohn's disease, granulomatous colitis, lymphogranuloma venereum, and in postirradiation changes, thrombosis of the inferior vena cava and tuberculous proctitis, tumor of the sacrum or posterior wall of the rectum. Carcinomatous deposits in the pelvis can also cause presacral space widening. Presacral edema is common in patients with heart failure who are conf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
