Nuclear and Mitochondrial Genome Assemblies of Indrella ampulla, a Terrestrial Gastropod Endemic to the Western Ghats.

Indrella ampulla is a polymorphic, brightly colored, forest-dwelling land snail endemic to the Western Ghats of India. Studying and understanding evolutionary processes occurring within this species has remained a challenge largely due to a paucity of genomic resources. We present high-quality annotated nuclear and mitochondrial genome assemblies of I. ampulla. The nuclear genome is assembled through a hybrid approach using Illumina short reads and Oxford Nanopore long reads, with an N50 value of 632 kb and 93.5% BUSCO genome completeness. The mitogenome is 13,887 bp long. The demographic history reconstruction based on the genomic data exhibits signatures of population decline during the last 100,000 years. This genome will aid in deciphering the color polymorphism in I. ampulla and augmenting the general understanding of the evolution of gastropods.