A new species within the genusMarionina(Enchytraeidae: Annelida: Clitellata) from the southern Black Sea
Articles > Article · 2007
Authors: Lisa Matamoros, Seray YILDIZ, Christer Erseus
Marine Biology Research, Journal Indexed in SCI Expanded, International, WoS, 2007, vol 3, pp 397-402
DOI: 10.1080/17451000701694844
Summary
A new species of Enchytraeidae, Marionina triplex sp. n. is described from an intertidal mussel bank in Sinop, southern Black Sea coast of Turkey. Marionina Michaelsen, 1889 is a widely distributed and heterogeneous assemblage of species, but while awaiting a revision the new species is placed here, as it appears to belong to a group of small enchytraeids currently associated with this genus. The new species in some aspects resembles other species reported from the Mediterranean–Black Sea area [M. adriaticus Vejdovský, 1877 Vejdovský, F. 1877. Zur Anatomie und Systematik der Enchytraeiden. Sitzungsberichte der Königliches Böhmischen Gesellschaft der Wissenschaften zu Prag, 1877: 294–304. [Google Scholar]; M. argentea (Michaelsen, 1889); M. brevis Finogenova, 1972 Finogenova NP. 1972 . New species of Oligochaeta from Dnieper and Bug Firth and Black Sea and revision of some species . Trudy Zoologicheskogo Instituta Akademii Nauk SSR , Leningrad 52 : 94 – 116 [In Russian]. [Google Scholar]; M. spicula (Frey & Leuckhart, 1847)] and some species described from elsewhere (M. cana Marcus, 1965 Marcus, E. 1965. Naidomorpha aus brasilianischem Brackwasser. Beiträge zur Neotropischen Fauna, 4(Heft 2): 61–83. [Taylor & Francis Online] , [Google Scholar]; M. singula Ude, 1896 Ude, H. 1896. Enchytraeiden, Hamburg: L. Friederichsen & Co. [Google Scholar]; M. sublitoralis Erséus, 1976 Erséus, C. 1976. Marine subtidal Tubificidae and Enchytraeidae (Oligochaeta) of the Bergen area, western Norway. Sarsia, 62: 25–48. [Taylor & Francis Online] , [Google Scholar]; M. ulstrupae Healy, 1996 Healy, B. 1996. New species of Marionina (Oligochaeta: Enchytraeidae) from a wave-exposed rocky shore in SE Ireland. Journal of Natural History, 30(9): 1287–95. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]), but it can be distinguished by its body length, number of segments, number and form of chaetae, shape and size of pharyngeal glands and spermathecae, etc. The new species is only 1.4–1.8 mm long, with 20–25 segments, and is thus one of the smallest marine enchytraeids known. It has mostly three chaetae per bundle, and spermathecae with the ampulla of about the same size as the ectal duct, and with a few gland cells attached to the base of the ectal duct.