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| Mollen, F.H.; Bakel , B.W.M. van; Jagt, J.W.M.. |
| A detailed redescription of a chondrocranium from the basal Boom Clay Formation (Rupelian, Upper Oligocene) at the SVK clay pit, Sint-Niklaas (province of Oost-Vlaanderen, Belgium), previously assigned to the sawshark Pristiophorus rupeliensis, is presented. The chondrocranium is re-identified as that of an angel shark (Squatinidae), based on comparative anatomy of extant Squatina, inclusive of CT scans of Squatina africana, S. australis, S. dumeril, S. guggenheim and S. squatina, with different geographic distributions and representing all four angel shark clades as defined in a previous molecular study. Differential characters for chondrocrania listed in earlier accounts to discriminate angel shark species from the southwest Atlantic proved to be even... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Chondrocranium; CT scanning; Neurocranium; Pristiophorus; Squatina; Vertebrae. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/607684 |
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| Li,Xiao-he; Cai,Yong-qiang; Wang,Xin; Gao,Shang; Li,Zhi-jun. |
| The aim of our study was to observe the occurrence rate and morphological characteristics of Infra-Lamina ridge (ILR) in Chinese population and provide a comprehensive reference for its clinical implication. Vertebrae columns of 82 sets of Chinese adult skeletons were collected. The shape of ILR was classified into three types; the occurrence of it in different sides and sexes were counted. The length, width, thickness of ILR were measured using a caliper with 0.02 mm accuracy. The ILR was usually found to occur from C7 to L5, with its frequency higher from T8 to 12, and highest at T10being up to 80.5%. There was significant statistical difference to the occurrence rate by side, sex and vertebral level. The largest values in its length and width were from... |
| Tipo: Journal article |
Palavras-chave: Infra-lamina ridge; Vertebrae; Ossification; Ligamentum flavum; Morphological characteristics. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200034 |
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| Adibatti,Mallikarjun; Asha,K. |
| In the lumbosacral region, anatomical variations occur with changes in the number of sacral vertebra either by deletion of first sacral vertebra or by the union of fifth lumbar or first coccygeal vertebra with sacrum. Lumbasacral transitional vertebrae (LSTV) is the most common congenital anomalies of the lumbosacral region. It most commonly involves the fifth lumbar vertebra showing signs of fusion to the sacrum known as sacralisation or the first sacral vertebra shows signs of transition to a lumbar configuration commonly known as lumbarisation. Complete transition can result in numerical abnormalities of the lumbar and sacral vertebral segments. Lumbarisation of first sacral vertebra is seen with a very low incidence of 2%. Knowledge of presence of such... |
| Tipo: Journal article |
Palavras-chave: Vertebrae; Sacrum; Sacralisation; Lumbarisation; Transitional vertebrae. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100007 |
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| Nourinezhad,Jamal; Bamohabat,Saleh; Mazaheri,Yazdan; Khazaeel,Kaveh. |
| Understanding normal fetal growth rates of the vertebral column, and between species, provide a basis to establish reference values for evaluation of body development and estimation of fetal age by ultrasonography. Goats are also widely used in biomedical perinatal research and are still considered a key to understanding the skeletal development. This study was carried out to clarify growth of length of vertebral column at segmental, regional, and total level of vertebral column in the fetal goats during different gestational age. The length of each vertebral segment of 25 goat fetuses, aged between 6 and 20 weeks were measured for each vertebra using a digital caliper. Our study demonstrated differences among various fetal ages in terms of regional,... |
| Tipo: Journal article |
Palavras-chave: Segmental growth; Vertebrae; Morphometrics; Goat fetus; Prenatal development. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200020 |
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