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A New Springsnail (Hydrobiidae: Pyrgulopsis) from the Lower Colorado River Basin, Northwestern Arizona
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A New Springsnail (Hydrobiidae: Pyrgulopsis) from the Lower Colorado River Basin, Northwestern Arizona
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A New Springsnail (Hydrobiidae: Pyrgulopsis) from the Lower Colorado River Basin, Northwestern Arizona
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Journal Article
A New Springsnail (Hydrobiidae: Pyrgulopsis) from the Lower Colorado River Basin, Northwestern Arizona
2016
Overview
We describe a new springsnail species, Pyrgulopsis hualapaiensis, from the Lower Colorado River basin (northwestern Arizona) that has an ovate- to narrow-conic shell and narrow penis ornamented with a small gland on the distal edge of the lobe. This new species differs from closely similar congeners from the Lower Colorado River basin in several details of female reproductive anatomy and in its mtCOI haplotype (3.0%–5.0% mean sequence divergence). Bayesian, maximum parsimony, and distance-based phylogenetic analyses of COI data congruently resolved P. hualapaiensis as sister to a divergent lineage of Pyrgulopsis thompsoni in the middle Gila River watershed (southeastern Arizona), although this relationship was not well supported. Pyrgulopsis hualapaiensis is endemic to a spring complex in the Hualapai Indian Reservation that is a culturally sensitive site for the tribe. The small population of these snails appears to be robust despite recent habitat modifications (trenching of outflow and construction of a spring box) and disturbance from road traffic. Future conservation measures could include monitoring of the population and augmentation of the gravel habitat used by these snails.
