Osteo-morphological studies on the skull and appendicular skeleton of blue bull
Loading...
Date
2016-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
In the present study, the skull was dolichocephalic in type. The cranial bones included occipital, sphenoid, ethmoid, interparietal, parietal frontal, temporal, and facial bones were maxilla, premaxilla, palatine, pterygoid, nasal, lacrimal, zygomatic, vomer, turbinates and mandible. The foramen magnum was large and roughly oval in shape. The foramen orbitorotundum was situated in between the wings of pre and post sphenoid bones. The interparietal was a small quadrilateral bone. The frontal bone was paired and formed the roof of cranial cavity. The supraorbital foramen was present over the frontal bone. The infraorbital foramen located above the 1st cheek tooth. The facial tuberosity was placed just above the 3rd cheek tooth, maxilla in front and lacrimal bone below. The turbinate bones were delicate, scroll-like, complex bony plates. The turbinate were clearly visible in radiographs. The cranial cavity was little with an ovoid cavity being elongated posteriorly, situated on the dorsal aspect of the nasal sinus. The scapula was a flat triangular bone. The lateral surface was divided by the scapular spine into a small and elongated supra-spinous fossa and a much larger and triangular, infra-spinous fossa. The spine was sharp and wavy in outline extended up to the neck of the bone. The acromian was pointed and tuber spine was in-distinguishable. Sub-scapular fossa was not markedly deep. The tuber-scapulae or supra-glenoid tubercle was small and the coracoid process was ill developed. The glenoid cavity was shallow and rounded. A small glenoid notch was present over glenoid cavity. The scapular index was 56.60. In humerus, the musculo-spiral groove was shallow. The deltoid tuberosity was large and prominent. The head was roughly oval in outline and the neck was well-defined. The lateral tuberosity was large and curved over the bicipital groove. The medial tuberosity was much smaller and did not divide noticeably. The coronoid fossa and olecranon fossae not communicated to each other and olecranon fossae had nutrient foramen. The radius was relatively shorter and broader as compare to ulna. The radius was fused to the ulna through the entire length except for two inter-osseous spaces, namely, proximal inter-osseous and distal inter-osseous spaces. The ulna was the longest bone of the fore-limb and was strongly curved. The carpus consisted of six short bones arranged in two transverse rows one above the other. The bones of the proximal row from medial to lateral were radial, intermediate, ulnar and accessory carpal. The bones of the distal row were second and third fused carpal and fourth carpal. The metacarpus comprised of two metacarpal bones. The large metacarpal bone consisted of fused III and IV metacarpals. One small metacarpal as metacarpal V Two fully developed digits (III and IV) were observed in each forelimb. Each digit had three phalanges. The first or proximal phalanx was laterally compressed. Second phalanx was nearly half the length of the first phalanx. The third phalanx was irregularly prismatic bone; a prominent extensor process was present on the dorsal border. Two small, crescent shaped proximal and one rounded distal sesamoid bones were present in each digit. The os-coxae was a flat irregular bone comprising of ilium, ischium and pubis. The ilium was the largest and was irregularly triangular in shape. The gluteal surface was concave, the iliac surface was smooth and the sacral surface was wider at its proximal and distal parts. The external angle was very large and prominent. The internal angle was a little below the level of the sacral spines. The ventral angle was the lower extremity of the bone. The ischium was placed behind the ilium and the pubis. The pelvic surface was smooth and concave. The ventral surface was nearly flat. The pubis was irregularly triangular; the anterior border presented an oblique sub-pubic groove. The antero-internal angle formed symphysis pubis with the opposite bone. The acetabulum was formed by the union of ilium, ischium and pubis and presented three notches. The obturator foramen was a large oval opening found on the floor of the pelvis and was formed by the ischium and the pubis. The femur was the largest, weighty and the most massive long bone. The shaft was cylindrical in the middle and prismatic below. The anterior surface presented the nutrient foramen. The proximal extremity was very wide and was composed of a head, neck and trochanter major. The trochanter major was placed laterally and was very massive. The distal extremity was large and composed of a trochlea in front and two condyles behind. The patella was small narrow irregularly triangular in outline. The tibia was a long prismatic bone, the shaft was distinctly curved, and three sided above. The nutrient foramen was placed in the upper-third, close to the lateral border. The anterior border was very prominent in its upper-third and constituted the tibial crest. The proximal extremity was large and consisted of three tuberosities and two condyles. The rudimentary fibula was attached to the lateral condyle. The lateral malleolus was a four-sided piece of bone compressed from side to side. The tarsus consisted of five short bones. The bones of the proximal row were tibial; fibular tarsal and in distal row were central and fourth fused, second and third fused and first tarsal. The metatarsus comprised of one large metatarsal bone and one rudimentary small metatarsal. The large metatarsal bone was quadrilateral in form and small metatarsal bone was ill developed. Two fully developed digits (III) and IV) were observed in each hindlimb. Each digit had three phalanges. The first or proximal phalanx was laterally compressed. Second phalanx was nearly half the length of the first phalanx. The third phalanx was irregularly prismatic bone; a prominent extensor process was present on the dorsal border. Two small, crescent shaped proximal and one rounded distal sesamoid bones were present in each digit.
Description
Keywords
null