Strong, Ellen E.; Garner, Jeffrey T.; Johnson, Paul D.; Whelan, Nathan V.
A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Strong & Garner & Johnson & Whelan, 2022
Fig.4. Type material of Juga plicifera (I. Lea, 1838). A. Melania plicifera I. Lea, 1838. Lectotype, USNM 119244. B. Melania silicula A. Gould, 1847. Lectotype, USNM 12137. C. Melania rudens Reeve, 1860. Lectotype, NHMUK 20110170/1. D. Goniobasis plicifera bulimoides Tryon, 1865. Lectotype, ANSP 27542. E. Goniobasis plicifera var. oregonensis Tryon, 1865. Lectotype, ANSP 27550. F. Goniobasis hemphilli Henderson, 1935. Holotype, UCM 21167a. G. Goniobasis hemphilli dallesensis Henderson, 1935. Holotype, UCM 16016a. Scale bar = 1 cm.
Fig. 5 (previous page). Shell morphology of Juga plicifera (I. Lea, 1838). Sequenced vouchers, arranged roughly from North to South. A. Near topotypic (Melania silicula A. Gould, 1847), USNM 1413235. B. USNM 1413244. C. USNM 1413471. D. USNM 1413219. E. USNM 1413170. F. USNM 1413171. G. USNM 1413222. H. USNM 1413183. I. USNM 1413177. J. USNM 1413204. K. USNM 1295003. L. USNM 1295178. M. USNM 1295022. N. USNM 1294958. O. Topotypic (Goniobasis hemphilli dallesensis Henderson, 1935), USNM 1294964. P. USNM 1295070. Q. USNM 1295196. R–S. Near topotypic (Melania plicifera I. Lea, 1838; Goniobasis plicifera var. oregonensis Tryon, 1865) R. USNM 1295147. S. USNM 1295150. T. USNM 1413397. U. USNM 1413028. V. USNM 1413386. W. USNM 1413370. X. USNM 1413409. Y. USNM 1413344. Z. USNM 1294972. A’. Near topotypic (Goniobasis plicifera var. bulimoides Tryon, 1865), USNM 1295172. B’. USNM 1413394. Scale bar = 1 cm.
Fig. 6. Radular morphology of Juga plicifera (I. Lea, 1838) (USNM 1295041). A. View of the anterior radular ribbon. B. Detail of cutting edge of rachidian and lateral teeth. C. Detail of lateral teeth cusps. D. Detail of rachidian cusps. E. Inner and outer marginal teeth. F. Detail of inner and outer marginal teeth cusps. Scale bars: A = 300 µm; B–C, E = 100 µm; D, F = 50 µm.
Fig. 7. Distribution maps. A. Juga plicifera (I. Lea, 1838). B. Juga acutifilosa (Stearns, 1890). C. Juga bulbosa (A. Gould, 1847). Red stars, type localities; black dots, sequenced specimens; gray dots, unsequenced museum material. Abbreviations: CA = California; NV = Nevada; OR = Oregon; WA = Washington.