Spiny Dogfish (Squalus acanthias)
Spiny Dogfish (Squalus acanthias)
Spiny Dogfish (Squalus acanthias)
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<strong>Spiny</strong> <strong>Dogfish</strong> (<strong>Squalus</strong> <strong>acanthias</strong>)<br />
Below is a list of things that you need to find and be able to identify on your shark:<br />
External Anatomy<br />
Head<br />
Rostrum<br />
Anterior dorsal fin<br />
Posterior dorsal fin<br />
Dorsal spines<br />
Pectoral fin<br />
Pelvic fin<br />
Caudal fin (heterocercal)<br />
Skin (placoid scales)<br />
Eye<br />
Nostril<br />
Spiracle<br />
Endolymphatic pores<br />
Ampullae of Lorenzini<br />
Mouth<br />
Teeth<br />
Gill slits<br />
Lateral line system<br />
Cloaca<br />
Claspers (male)<br />
Urogenital (male)/Urinary (female) papilla<br />
Cross Section through tail<br />
Epaxial muscles<br />
Hypaxial muscles<br />
Horizontal septum<br />
Dorsal vertical septum<br />
Ventral vertical septum<br />
Hemal arch & spine<br />
Caudal artery<br />
Caudal vein<br />
Neural arch & spine<br />
Spinal cord<br />
Centrum<br />
Skeleton & Skull<br />
• Chondrocranium<br />
Rostrum<br />
Olfactory capsule<br />
Foramen magnum<br />
• Splanchnocranium<br />
Mandibular arch<br />
Palatopterygoquadrate cartilage<br />
Meckel’s cartilage<br />
Hyoid arch<br />
Hyomandibular cartilage<br />
Ceratohyal cartilage<br />
Basihyal cartilage<br />
Visceral arches<br />
• Vertebral column<br />
Vertebrae<br />
• Pectoral girdle<br />
• Pelvic girdle
Internal Anatomy<br />
Body cavity<br />
Pleuroperitoneal cavity<br />
• Esophagus<br />
Esophageal papillae<br />
• Stomach<br />
Cardiac portion with rugae<br />
Pyloric portion ending with pylorus<br />
• Small intestine<br />
Duodenum<br />
Ileum with spiral valve<br />
• Colon<br />
Rectal gland<br />
• Rectum<br />
• Liver<br />
Right, left, median lobes<br />
• Gall Bladder<br />
Common bile duct<br />
• Pancreas<br />
• Spleen<br />
• Kidney<br />
• Mesonephric duct<br />
• Testis & Mesorchium (male)<br />
• Ovary & Mesovarium (female)<br />
• Seminal vesicle (male)<br />
• Oviduct & uterus (female)<br />
Pericardial Cavity<br />
• Pericardium<br />
• Heart<br />
Atrium<br />
Ventricle<br />
Conus arteriosus<br />
Ventral aorta<br />
Afferent branchial arteries<br />
Sinus venosus<br />
Blood vessels<br />
• Ventral aorta<br />
• Dorsal aorta<br />
• Celiac artery<br />
• Gastric artery<br />
• Hepatic artery<br />
• Pancreaticomesenteric artery<br />
• Anterior intestinal artery<br />
• Posterior intestinal artery<br />
• Annular artery<br />
• Iliac artery<br />
• Hepatic portal vein<br />
• Gastric vein<br />
• Lienomesenteric vein<br />
• Pancreaticomesenteric vein<br />
• Anterior intestinal vein<br />
• Posterior intestinal vein<br />
• Annular vein<br />
• Renal portal vein<br />
• Posterior cardinal vein<br />
• Posterior cardinal sinus<br />
• Anterior cardinal vein<br />
• Common cardinal vein<br />
• Sinus venosus
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