If you need an accessible version of this item please contact JSTOR User Support

Studies on North American Fairy Shrimps with the Description of Two New Species

Ralph W. Dexter
The American Midland Naturalist
Vol. 49, No. 3 (May, 1953), pp. 751-771
Published by: University of Notre Dame
DOI: 10.2307/2485207
Stable URL: http://www.jstor.org/stable/2485207
Page Count: 21
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Studies on North American Fairy Shrimps with the Description of Two New Species
Preview not available

Abstract

A study of the fairy shrimps of North America from field collections of the writer and specimens contributed by field biologists and museums has resulted in the following additions to our knowledge of the geographical distribution and ecology of these ephemeral crustaceans. The known geographic range of 16 species has been extended by the acquisition of records from the following states, provinces, or regions not previously given in the literature: Polyartemiella hanseni-Northwest Territories. Thamnocephalus platyurus-Nevada, New Mexico, California. Chirocephalopsis bundyi-New Hampshire, Vermont, Illinois, Minnesota, South Dakota, Nebraska, Utah. Eubranchipus vernalis-West Virginia, Tennessee, North Carolina. E. serratus-Indiana, Montana, Washington. E. holmani-Georgia, North Carolina. E. ornatus-North Dakota, Montana, Nebraska. E. oregonus-Washington. Artemia salina-Puerto Rico, Nevada, North Dakota. Branchinecta paludosa-Nova Scotia. B. shantzi-Utah. B. coloradensis-Arizona, Nevada. B. lindahli-Nebraska, New Mexico, Arizona. B. gigas-Nevada, Utah. Streptocephalus texanus-Florida. S. seali-Nebraska, North Dakota. Several additional collections of either rare species or specimens from localities where few have ever been known are placed on record. The history of collections of fairy shrimps in the state of Florida is reviewed with the addition of recent records. Eubranchipus floridanus n. sp. is described from Alachua County, Florida Branchinella alachua n. sp. is described from Alachua County, Florida. New records of different species of Anostraca inhabiting the same pond are given. The following were collected together: Chirocephalopsis bundyi with Eubranchipus serratus. C. bundyi with Streptocephalus seali. S. seali with S. texanus. E. floridanus with S. seali and S. texanus. B. alachua with S. seali. S. texanus with Thamnocephalus platyurus. S. seali with E. vernalis. S. texanus with Branchinecta lindahli and T. platyurus. S. texanus with B. lindahli. T. platyurus with Streptocephalus sp. E. vernalis with E. holmani. Some specimens have been discovered bearing anomalous appendages. These are: One Eubranchipus vernalis with a spine on the right clasper, and three immature specimens with abnormally developed antennal appendages; one Streptocephalus seali with a spinous growth on the right cercopod; one E. serratus lacking the antennal appendage on the right side, and four others having a mixture of male and female antennae and antennal appendages on the same individual. Fluctuations of populations of Eubranchipus serratus in east central Illinois in the spring of 1945-50 inclusive are tabled and described and are compared with earlier published records. The populations of 1947 were the poorest while those of 1949 were the most abundant and widely spread during the term of this study.

Page Thumbnails

  • Thumbnail: Page 
751
    751
  • Thumbnail: Page 
752
    752
  • Thumbnail: Page 
753
    753
  • Thumbnail: Page 
754
    754
  • Thumbnail: Page 
755
    755
  • Thumbnail: Page 
756
    756
  • Thumbnail: Page 
757
    757
  • Thumbnail: Page 
758
    758
  • Thumbnail: Page 
759
    759
  • Thumbnail: Page 
760
    760
  • Thumbnail: Page 
761
    761
  • Thumbnail: Page 
762
    762
  • Thumbnail: Page 
763
    763
  • Thumbnail: Page 
764
    764
  • Thumbnail: Page 
765
    765
  • Thumbnail: Page 
766
    766
  • Thumbnail: Page 
767
    767
  • Thumbnail: Page 
768
    768
  • Thumbnail: Page 
769
    769
  • Thumbnail: Page 
[770]
    [770]
  • Thumbnail: Page 
771
    771