Key To Faxonella

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KEY TO THE SPECIES OF THE GENUS FAXONELLA

(Based on First-Form Males)


NOTE:  Pleopods should be examined in situ in caudal aspect.

Species Not Appearing in Key:   Faxonella blairi   (Range: SE Oklahoma and SW Arkansas)


1.   Mesial process of first pleopod less than 1/4 length of central projection and never overlapping
      mesial process of corresponding pleopod (Fig. 19c):  ..............................  Faxonella clypeata  (Hay, 1899)

        (Sluggish streams and lentic habitats from LeFlore County, Oklahoma, and Marion County,
           Texas, east to Gadsoen County, Florida, and Richland County, South Carolina.  Literature:
           Fitzpatrick, 1963)

  • Mesial process of first pleopod greater than 1/4 length of central projection and completely
    overlapping mesial process of corresponding pleopod (Fig. 19a,b)......................................................  2

 


 
Fig. 19.  Ventral view of first pleopods.  a). Faxonella creaseri,  b).  F. beyeri,  c). F.  clypeata.

2(1).  Mesial process of first pleopod distinctly greater than 1/3 length of central projection but
          never completely overlapping both terminal elements of corresponding pleopod (Fig. 19b): .............
          ...................................................................................................................  Faxonella beyeri  (Penn, 1950)

        (Roadside ditches in De Soto and Natchitoches parishes, Louisiana.  Literature:
           Fitzpatrick, 1963, Penn, 1950).

  • Mesial process of first pleopod about 1/3 length of central projection and always completely
    overlapping both terminal elements of corresponding pleopod (Fig.  19a; see also Fig. 5w):...........
    ..................................................................................................................  Faxonella creaseri   Walls, 1968

        (Roadside ditches in Cadwell Parish, Louisiana.  Literature:  Walls, 1968).

 


Last Updated:  10 September 2004