Page 76 - The Freshwater Mussels of Oklahoma

Partial Synonymy:
Lampsilis luteola (Lamarck, 1819), Isely 1925
Lampsilis radiata luteola (Lamarck, 1819), Valentine and Stansbery 1971; Oesch
1984; Watters 1995
Lampsilis radiata siliquoidea (Barnes, 1823), Murray and Leonard 1962; Branson
1984
Lampsilis siliquoidea (Barnes, 1823), Turgeon and others 1988; Vidrine 1993
Description:
“Shell oblong, elongate, ovate; dorsal and ventral margins nearly parallel; dorsal
margin straight, ventral margin straight, sometimes gently rounded; anterior end
uniformly rounded, posterior end straight dorsally, angled where it meets the dorsal
margin, rounded below. Shell thickness is uniform; size to 13.2cm; shell moderately
compressed to moderately inflated, the later seen in females who become noticeably
swollen in the postero-ventral region; Posterior ridge not prominent, gently rounded
dorsally. Beaks broad, slightly raised above the hinge line; inequipartite; beak sculpture
has several fine lines sharply drawn up in the middle. Growth-rest lines noticeable but
not prominent features on the shell. Epidermis shiny, light yellow in young shells,
becoming dark chestnut in some old specimens; bright green rays that uniformly cover
the shell may be broad to fine capillary type rays; some are rayless.
Left valve has two erect, compressed, emarginated pseudocardinal teeth; lateral
teeth short slightly curved and relatively low. Right valve has a large erect, emarginated
pseudocardinal tooth; there is a small lamellar tooth anteriorly; lateral tooth thin and
straight. Interdentum absent; beak cavity shallow; nacre white, iridescent posteriorly”
(Oesch 1984, p 213-214).
Hosts for Glochidia:
Black Crappie, Bluegill, Common Shiner, Largemouth Bass, Orangespotted
Sunfish, Pumpkinseed, Rock Bass, Sauger, Smallmouth Bass, Walleye, White Bass,
White Crappie, White Sucker, Yellow Perch (Watters, 1994).
Comments:
Specimens in the upper Mountain Fork drainage tend to be compressed and often
have pink/reddish nacre.

Table 11. Summary of L. siliquoidea shell characters.

H/L Mean Maximum W/L Mean
Range H/L Length Range W/L
Location N (%) (%) (mm) (%) (%) Remarks
Arkansas River System
Poteau River and
Fourche Maline Creek
♂ 5 52.5-54.4 53.6 103 30.1-32.3 30.8
♀ 2 57.8-58.5 58.2 94 51.1 -
Red River System
Mountain Fork River
♂ 20 50.8-62.5 55.7 122 32.8-45.7 37.9 13 of 19 rayless
6 of 19 pinkish
♀ 19 54.2-63.9 58.2 120 31.6-42.5 38.7 10 of 19 rayless
5 of 19 pinkish

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