Complete morphological re-description of mud-dwelling axiid Leonardsaxius amurensis (Kobjakova, 1937) with remarks on Axiidae (Crustacea: Decapoda: Axiidea) from the Russian coast of the Sea of Japan

Abstract

The first complete re-description of mud-dwelling axiid Leonardsaxius amurensis (Kobjakova, 1937) (Crustacea: Decapoda: Axiidea) is presented based on the holotype and freshly collected specimens from Vostok Bay, Russia coast of the Sea of Japan. The species is mostly morphologically similar to Leonardsaxius spinulicauda (Rathbun, 1902) known from Pacific coasts of North America from Vancouver to California but can be morphologically separated mainly by morphology of carapace and coloration of cornea of eyes. Remarks on distribution of Leonardsaxius amurensis (Kobjakova, 1937) and the second axiid species, Boasaxius princeps (Boas, 1880), known along Russian coastline of the Sea of Japan are given.

The Stable Carbon and Nitrogen Isotope Compositions of Larvae of Burrowing Shrimps (Crustacea: Decapoda: Gebiidea and Axiidea) from Vostok Bay, Sea of Japan

“…A total of eight species of burrowing shrimp are known from Vostok Bay (Peter the Great Bay, Sea of Japan): Upogebia major (De Haan, 1841), U. issaeffi (Balss, 1913), and U. yokoyai Makarov, 1938 from the infraorder Gebiidea, and also Leonardsaxius amurensis (Kobjakova, 1937), Boasaxius princeps (Boas, 1880), Nihonotrypaea japonica (Ortmann, 1891), N. makarovi Marin, 2013, andN. petalura (Stimpson, 1860) [7,8,32,33] from the infraorder Axiidea. These species were reared in laboratory cultures by the generally accepted method, using Artemia nauplii as feed.…”

A new species of the genus Liljeborgia Spence Bate, 1862 (Crustacea: Amphipoda: Liljeborgiidae) associated with the burrows of the spoon worm Urechis unicinctus in the Sea of Japan

“…A variety of symbiotic communities associated with soft-bottom deep-burrowing invertebrates were investigated in the Peter the Great Bay and Posjeta Bay in the Sea of Japan. The sampling of infaunal animals and symbiotic assemblage was carried out using a bait suction pump (yabby pump), which allowed us to study the diversity of burrowing crustaceans and their associates in Russian waters (e.g., Marin 2010Marin , 2015Marin , 2016Marin , 2018aMarin , 2018bMarin et al 2011Marin et al , 2013Marin & Kornienko 2014) with the description of several new crustacean (Marin 2013(Marin , 2017 and even a new phoronid species (Temereva & Chichvarkhin 2017). Numerous specimens of Liljeborgia sp.…”

The complete description of larval stages of the lobster shrimpLeonardsaxius amurensis(Kobjakova, 1937) (Decapoda: Axiidea: Axiidae) identified by DNA barcoding

“…Two axiid species, Boasaxius princeps (Boas, 1880) and Leonardsaxius amurensis (Kobjakova, 1937), inhabit Russian waters of the Sea of Japan (Marin, 2015). Leonardsaxius amurensis was originally described as Axius spinulicauda amurensis Kobjakova, 1937.…”

“…Both localities are parts of the large Peter the Great Bay. The species is usually found inside burrows made in sand, rocky, gravel or shelly limestone substrates, under large stones or at the base of boulders or rocks; rarely observed on muddy bottoms (Marin, 2015).…”