102 U.S. NATIONAL MUSEUM BULLETIN 259 



Corresponding to the recent description by Holsinger (1966), but 

 applying only to the female of that description, and with the following 

 additions: 



Antenna 1 up to about 60 percent as long as body, about 50 to 55 

 percent longer than antenna 2. Mandibular palpal segment 3 with 

 10 or 11 long setae, segment 2 with 10 or 11 setae. Lower lip, inner 

 lobes moderately broad. Pereopod 7 about 50 to 55 percent as long 

 as body and a little longer than pereopod 6. Median sternal and 

 pleonite sternal gills absent. Abdominal side plates : posterior margins 

 weakly convex to nearly straight, with 4 or 5 setae each; posterior 

 corners rounded; ventral margins of plates 2 and 3 with 3 spines each. 

 Pleopod 1, inner ramus about 25 percent longer than peduncle. 



Distribution and ecology. — This species is known only from a 

 small stream in the type locality. Ovigerous females have not been 

 collected to date. 



Remarks. — I have reexamined the single male from Neel Cave, 

 Menard Co., Tex., originally considered a para type of this species 

 (Holsinger, 1966), and can no longer regard it as conspecific. The 

 diagnosis given above is based solely on females from the type locality, 

 and the original description of this species should be restricted simi- 

 larly. On the basis of more recent knowledge brought to light by the 

 present monographic study of Stygonedes, differences existing in 

 gnathopods and uropods between the Whiteface Cave females and the 

 Neel Cave male are too great to even account for variation in second- 

 ary sex characters. The exact taxonomic status of this single male is 

 presently unclear (see Stygonedes species, below) and clarification 

 must await further material from Neel Cave or the immediately 

 surrounding area. 



Stygonedes clantoni (Creaser), new combination 



Figure 25 



Synpleonia clantoni Creaser, 1934, pp. 1-5, pi. 1 [Type locality: well, 4 miles SE 

 of Ottawa, Franklin Co., Kans.]. — Schellenberg, 1936, p. 40. — Mackin, 1941, 

 p. 30 (in part).— Hubricht, 1943, p. 711 (in part) .—Barnard, 1958, p. 74.— 

 Hubricht, 1959, p. 878 (in part) .—Nicholas, 1960, p. 130 (in part). [Not 

 Dearolf, 1941, p. 171; 1948, p. 20; 1953, p. 228 (?).] 



Material examined 



KANSAS. — Franklin Co.: well on Clanton Farm, 4 miles SE of Ottawa, male 

 holotype (USNM 98401), female allotype (USNM 98402), and male paratype 

 (USNM 80526), W. Clanton, Aug. 28, 1928; Dunkak Well, 1.5 miles NE of Lane, 

 L. Hubricht, Aug. 31, 1941 (LH) ; Butler Co.: Purity Springs, J. R. Holsinger and 

 R. Norton, June 12, 1964 (JRH) ; Rutherford Cave, 6 miles S of El Dorado, 

 L. Hubright, May 18, 1942 (LH). Missouri. — Cass Co.: well at Harrisonville, 

 A. D. Newman, Aug. 21, 1915 and Feb. 24, 1917 (USNM); Camden Co.: River 

 Cave at Hahatonka, L. Hubricht, June 22, 1946 (LH). 



