2020
DOI: 10.31396/biodiv.jour.2020.11.3.689.698
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Two new Helobdella species (Annelida Hirudinida Glossiphoniidae) from the Intermountain region of the United States, formerly considered as Helobdella stagnalis Linnaeus, 1758

Abstract: Two Helobdella stagnalis-like leech specimens (Annelida Hirudinida Glossiphoniidae) were histologically examined from Nevada in the Great Basin, and from Utah in the Colorado River Basin (USA) to determine whether or not their crops were similar to those in H. californica Kutschera 1988. The Nevada form was brown and with pigmentation patterns, whereas the Utah form was plain and white. The dorsoventral histological sectioning of these 3 specimens showed the Utah and Nevada forms had compact salivary glands, h… Show more

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