Arthritica bifurcaArthritica bifurca is a species of bivalve native to New Zealand.DescriptionArthritica bifurca is a hermaphroditic bivalve mollusc, with a shell length of approximately 6mm.Arthritica bifurca has D-shaped larvae.DistributionArthritica bifurca is found free-living in mud or muddy sand habitats in New Zealand estuaries.