Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXIII, Issue 1
Written by Anca ȘEICARU
The coypu (Myocastor coypus) is a semi-aquatic mammal rodent, native from South America. Besides the fact that they are resistant to diseases and eat less, the coypu are useful for the precious fur and also for the tasty meat. After analyzing the bibliographic material it was noted that the data referring to the anatomy of this species are very sketchy, in particular those relating to the lymphatic system. For this reason I have chosen this topic, aiming to complement the existing data in the literature on the morphology of the muscular lymph nodes, at coypu. For the necessary investigations from this study, have been used corpses of coypu. After dissection it has been noted that existence of the mandibular, parotid, lateral retropharyngeal, rostral hyoidian, axillary and accessories lymph nodes. At the macroscopically level it was not possible to certainly determine the existence of superficial cervical lymph nodes, instead were described in detail the axillary lymph nodes, which is not found in this species bibliographic data. After dissection it was noted the presence of one lymph node, bilateral, at 40% of the dissected individuals (two specimens out of five). Their topography is the one characteristic to another domestic species, being situated caudal from the scapulo-humeral articulation, between the thoracic member and trunk, caudal to the emergence of the caudal cutaneous nerve of the forearm (the ulnar nerve).
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