File:American malacological bulletin (1986) (17969964789).jpg

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Description
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Title: American malacological bulletin
Identifier: americanmal4519861987amer (find matches)
Year: 1983 (1980s)
Authors: American Malacological Union
Subjects: Mollusks; Mollusks
Publisher: (Hattiesburg, Miss. ?) : (American Malacological Union)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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T Fig. 4. Detail of the anterior and right side sorting areas of the stomach interior: a, M. margaritifera; b, M. marrianae; c, C. mono- donta. Legend in c applies to a and b. Lines in sorting areas indicate orientation of ciliated ridges. Abbreviations: ASA = anterior sorting area, OES = esophagus, RD = right duct system, RSA = right sorting area. Horizontal field width = 7 mm. and posterior trunks (see Fig. 2). Exceptions rarely occurred in which certain specimens showed multiple openings (Fig. 3a). Sorting areas were variously developed along the right side and anterior floor of the stomach interior. The right side sorting area was a low shelf (Fig. 4a), not strongly set off from the anterior stomach floor as it is in some species of the unionid genera Lampsilis (Kat, 1983b) and Anodonta (Smith, pers. obser.). Purchon (1958) and Dinamani (1967) did not provide sufficiently detailed descriptions of the right sorting area to make comparisons with margaritiferids. The sorting ridges of the right sorting area extended anteriorly and medial- ly from the right side wall. A weak sorting area, analogous (but not necessarily homologous) to "SA7" of Purchon (1958), was usually present, even if barely developed. The sorting area was occasionally absent altogether (Fig. 4a).
Text Appearing After Image:
Fig. 5. Detail of the sorting areas of the stomach roof, as viewed through the roof: a, M. margaritifera; b, M. marrianae; c, C. monodon- ta. Legend in c applies to a and b. Lines in sorting areas indicate orientation of ciliated ridges. Abbreviations: ASR = anterior sorting area of roof, OES = esophagus, PSR = principal sorting areas of roof, RS = ridges delimiting principal sorting areas of roof, TR = transverse ridge. Horizontal field width = 9 mm. The roof of the stomach contained the least developed sorting areas of all three species (Fig. 5a). The two principal posterior sorting areas (PSR, Fig. 5) of the roof were consis- tent with other investigated unionacean species. A poorly defined system of weak sorting ridges was sometimes pre- sent (ASR, Fig. 5a) anterior to a transverse ridge (TR, Fig. 5). The relationship of this sorting area to the anterior

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4
Flickr tags
InfoField
  • bookid:americanmal4519861987amer
  • bookyear:1983
  • bookdecade:1980
  • bookcentury:1900
  • bookauthor:American_Malacological_Union
  • booksubject:Mollusks
  • bookpublisher:_Hattiesburg_Miss_American_Malacological_Union_
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:24
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
27 May 2015

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Public domain
This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.

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