Year: 2019 | Month: June | Volume 9 | Issue 3
Comparative Gross Morphological Studies on the Os-Coxae of Crested Serpent Eagle (Spilornis cheela) and Brown Wood Owl (Strix leptogrammica)
Abstract:
The present study was conducted on os-coxae of crested serpent eagle and brown wood owl. The os-coxae consisted of three bones namely ilium, ischium and pubis. All the three bones were fused and the space between these bones was occupied by lumbo-sacral mass. Ventrally, the bones of os-coxae did not unite with each other leaving the pelvis open. Ilium was divided into pre-acetabular and post-acetabular parts. The dorsal surface of the pre-acetabular part was elongated and concave whereas post-acetabular part was small and convex in both the species. A very sharp and prominent crest was observed dorsally on either side of the lumbo-sacral mass. The renal fissure for the lodgement of the kidneys was observed in both species. The ischium was flat and somewhat triangular in shape. It formed a large sciatic foramen with the ilium and obturator foramen with pubis. The pubis was a thin rod-like elongated bone situated along the ventral border of the ischium and formed ischio-pubic incisures in brown wood owl but in crested serpent eagle, the pubis was completely fused with the ischium forming a flat plate-like structure. There was a small pectineal process at the anterior end of the pubis in the brown wood owl. The acetabulum was circular in outline and in the form of a foramen for articulation with the head of the femur.
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