University of California Publications in Zoology Volume 8

University of California Publications in Zoology Volume 8

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...genera is practically obliterated. Recognizing the fundamental identity of the skeletal formula in these two genera and finding it difficult to apply consistently any set of morphological distinctions between the two as the number of species ascribed to them has increased, I feel constrained to include Steiniella Schiitt (1895) in the older genus Gonyaulax, according it therein only a subgeneric status. The differences between the valid species of Steiniella (S. fragilis, S. mitra, and iS'. inflata) and Gonyaulax are no greater, if indeed as great, as those now found between species within Gonyaulax itself. A marked tendency to fall to pieces on the part of the theca, the predominance of vermiculate-linear markings, and an elongated apex overlapping the dorsal edge of the anterior end of the body are the only available characters upon which to found the genus Steiniella, and no one of them affords an adequate basis for separation since they are all to be found in varying degrees within Gonyaulax itself. They are, moreover, purely superficial characters such as are subject to great modifications in many of the larger genera of the dinofiagellates. The species of Steiniella thus far described which should be transferred to Gonyaulax are the following: Gonyaulax Steiniella) fragilis Schiitt. See Schiitt (1895). G. (Steiniella) mitra (Schiitt). See Schiitt (1895). G. (Steiniella) inflata (Kofoid). See Kofoid (1907a). Certain other species have been described in the genus Steiniella which have previously been otherwise assigned. Steiniella(?) punctata described by Cleve (1900a) was assigned by me (1907a) to the new genus Murrayella, while Cleve's (1903) Steiniella (?) complanata was in the same paper referred by me to another new genus more

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  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236591887
  • 9781236591883