Abstract
First record of a putative novel invasive Corbicula lineage discovered in the Illinois River, Illinois, USA
Highlights
The Great Lakes watershed is one of the most altered freshwater ecosystems in the world with an estimated 186 established aquatic invasive species
We provide the first description of an apparent new morphotype and putative new lineage of the invasive Asian clam genus Corbicula Mühlfeld 1811 occurring in the Illinois River
Our preliminary analyses recovered three different Corbicula lineages representing Forms A, B, and D occurring sympatrically in the Illinois River according to shell phenotype and nuclear 28S ribosomal genotype data
Summary
The Great Lakes watershed is one of the most altered freshwater ecosystems in the world with an estimated 186 established aquatic invasive species (hereafter AIS; Vander Zanden et al 2010 and references therein). And rapid detection of AIS is crucial to reduce and limit these impacts (Vander Zanden et al 2010). We provide the first description of an apparent new morphotype and putative new lineage of the invasive Asian clam genus Corbicula Mühlfeld 1811 occurring in the Illinois River. The Illinois River is an important shipping route directly connecting the Great Lakes basin to the Mississippi River drainage via the Chicago Sanitary and Ship Canal (Figure 1). Because the new morphotype might be unique to the Illinois
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