1972. A new species of platyctenean ctenophore, Lyrocleis flavopallidus sp. nov., from McMurdo Sound, Antarctica. Can. J. Zool. 50: 47-52. Lyrocteis flavopallidus sp. nov., a large (up to 110 mm tall) platyctenean ctenophore from the Antarctic, is described on the basis of the external morphology. The pale straw-yellow color, lack of ridges and frills on the body and arms, presence of small papillae on the body, and geographical location are considered sufficient to distinguish L. jTavopallidus from L. imperatoris Komai, 1941, the only other species in the genus. The systematic placement of L. flavopallidus is somewhat uncertain because neither the anatomy of the reproductive system nor the larval development is known; the species may represent a new genus and possibly a new family.Lyrocteis jlavopallidus is sedentary and usually found atop spongesor other elevated surfaces. However, it is able to move at least 1 to 2 m per day possibly to attain a more advantageous feeding position. Food items are captured by the sticky tentacles and transferred to the mouth. ROBILLIARD, G. A., et P. K. DAYTON. 1972. A new species of platyctenean ctenophore, Lyrocieisflavopallidus sp. nov., from McMurdo Sound, Antarctica. Can. J. Zool. 50: 47-52. On dkrit ici la morphologie externe de Lyrocteisflavopallidus sp. nov., ctknophore platycttnide de grande taille Uusqu'A 110 mm) de l'htarctique. La coloration jaunltre, l'absence d'&tes et de franges sur le corps et les bras, la prksence de papilles minuscules sur le corps et entin la situation gtographique de cet animal en font une espke distincte de L. imperatoris Komai, 1941, seule autre espkce du genre. La position systtmatique de L. jTavopallidus demeure incertaine car I'anatomie de son systeme reproducteur de meme que son dkveloppement larvaire sont encore inconnus; peut-&re s'agit-il d'un autre genre ou meme d'une autre famille.Lyrocteis flavopallidus est un animal skdentaire se rencontrant ordinairement sur des tponges ou sur toute autre surface surklev&. I1 peut cependant ramper d'au moins 1-2 m par jour, probablement pour atteindre une meilleure source de noumture. Des tentacules visqueux lui servent A attraper des particules de nourriture qu'il porte ensuite I sa bouche. , ~ --Medd. Naturhist. &en. Kjobenhavn, 17: 249-253. -1912. Ctenophora. The Danish-Ingolf Expedition, Vol. 5 (2). Bianco Lunco. pp. 1-95. RANKIN, J. J. 1956. The structure and b~ology of Val-Iicula multijormis, gen. et sp. nov., a platyctenid ctenophore. J. Linnean Soc. London Zool. 43: 55-71. FIG. 4. Lyrocteisflavopallidus sp. nov. on a sponge, Rosella r.acovitzae, at 50 m at Hut Point, Antarctica. $ x. FIG. 5. Lyr.oc/eisflavopallidus sp. nov. on a steel rod wrapped with tape at 45 ni at Hut Point, Antarctica.See text for explanation, t X.
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