NO. 3544 SUBSPECIES OF CAMBARUS LONGULUS — JAMES 9 



Cambarus longulus longirostris Faxon 



Cambarus Bartonii var. longirostris. — Faxon, 1885a, Mem. Mus. Comp. ZooL, 

 vol. 3, p. 64; 1885a (part), p. 64; 1885b, p. 358; (as C. bartonii longirostris); 

 1890, pp. 623, 624; 1898 (part), p. 649.— Harris, 1903 (part), pp. 58, 75, 154.— 

 Ortmann, 1905 (part), pp. 128, 129, 135.— Faxon, 1914, pp. 389, 424.— New- 

 combe, 1929, p. 286. 



Cambarus bartonii spinirostris. — Faxon, 1890, pp. 623, 624. 



Cambarus longulus.— Faxon, 1890 (part), pp. 623, 624; 1898 (part), p. 650.— 

 Harris, 1903 (part), pp. 58, 107, 138, 154, 155, 159.— Ortmann, 1913 (part), 

 pp. 335, 337, 362, 375.— Fleming, 1938, pp. 299, 300, 301.— Brimley, 1938, 

 p. 502.— Hobbs, 1959 (part), p. 898; 



Cambarus longulus longirostris. — Hay, 1899, pp. 959, 966; Johnson, 1957, pp. 178, 

 182; 1959, pp. 181, 183.— Hobbs, 1959 (part), p. 898. 



Cambarus (Cambarus) longulus longirostris. — Ortmann, 1931 (part), pp. 121-124. 



Cambarus longerosilis Brimley, 1938, p. 503. 



Diagnosis. — Concoloroiis in shades of blue green through orange, 

 or bicolorous with two dark dorsal saddles of varying widths; one on 

 posterior part of carapace and the other immediately cephalic to cer- 

 vical groove (figs. 2a,b). Rostrum with strongly swollen margins, 

 without spines or tubercles, abruptly tapering to moderately short 

 acumen, length .78-1.1 (average 1.0) times postorbital width. Sub- 

 orbital angle and postorbital spines and ridges strong (pi. Ir). Bran- 

 chiostegal spines and lateral spines or tubercles on carapace absent. 

 Length of areola 2.3-5.9 (average 4.0) times width, 30-39 (average 

 36) percent of length of a carapace, and with 3-10 punctations across 

 narrowest part (average 7-8). Antennal scale 1.7-3.0 (average 2.3) 

 times longer than broad. Chela mostly as in C. I. longulus (pi. 

 ln,o), length of outer margin of chela 1.5-1.8 (average 1.7) times 

 length of dactyl and 2.6-4.4 (average 3.1) times length of inner 

 margin of palm, length of dactyl of chela 1.5-3.0 (average 1.9) times 

 length of inner margin of palm, and width of palm .52-.88 (average 

 .72) times length of dactyl. First pleopod of first-form male as 

 pictured (pi. lf,g). 



Remarks. — Faxon (1885a, p. 64) indicates that his collection of 

 three specimens"from Cumberland Gap (Claiborne Co., Tenn.) have 

 well-marked lateral spines on the carapace." Since the chela of this 

 Powell River form differs from that of the typical C. longulus, it is, 

 presumably (awaiting further data), other than the species C. longulus. 

 Some specimens of C. longulus longirostris do have a minute tubercle 

 in place of the lateral spine. 



Little difference exists between C. longulus longirostris and the 

 other two subspecies. Variations in all characteristics thus far ob- 

 served, exclusive of the suborbital angle, overlap to some degree 

 those of the other subspecies: average ratios calculated for C. longulus 

 longirostris usually lie midway between those calculated for C. I. 



