Marsenina uchidai
| Marsenina uchidai | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Velutinidae |
| Genus: | Marsenina |
| Species: | M. uchidai
|
| Binomial name | |
| Marsenina uchidai Habe, T. 1958
| |
Marsenina uchidai is a species of velutinid, a type of gastropod, and appears outwardly similar to a dorid nudibranch. However, it has an internal shell hidden by the mantle. It inhabits Asian boreal waters off of Japan and Russia.[1]
Description
Adult
It appears similar to other Marsenina species such as Marsenina stearnsii, except that it is more brightly colored, with a spotted brownish-yellow mantle with a slit in the middle, covering the translucent white ear-shaped shell.[2] Its head has two head tentacles with eyespots at the base, typical of velutinid gastropods. Like other Marsenina species, it is a simultaneous hermaphrodite. The penis of this species is described as "beaked, slightly bent" with a "crest above the bend".[1]
Shell
The shell is fragile, with a low spiral that arcs upwards for 3.5 convex whorls.[1] The final whorl has a long descending shoulder. Like other Marsenina shells, the only surface markings are thin growth lines. The aperture is wide and downwardly oblique. The type specimen shell measures 10 x 13.7 mm.[3]
Range
M. uchidai is a boreal species, known from the Bering Sea (Bering Island), Sea of Okhotsk, southern Kuril Islands, Sakhalin, Sea of Japan (recorded on Bolshoi Pelis Island,[4] part of the Rimsky-Korsakov Archipelago), and the North Pacific (Hokkaido, Japan). It is common in the Sea of Japan on the coasts of Sakhalin and Primorsky Krai.[5]
Habitat and ecology
Very little is known about the habitat and ecology of this species of psychrophile. The depths it inhabits are variously listed as the intertidal to 26 m,[6] 5-60 m,[5] and intertidal to 126 m,[1] on rock, sand and shell, or pebble seafloor. One individual was found in a scientific trawl in the Sea of Okhotsk off the coast of Hokkaido at a depth of 75 m, along with a possible food source, the solitary tunicate Eugyroides glutinans.[7] It is likely that similar to many velutinid species, M. uchidai is eurybathic,[8] meaning it is able to live in shallow to deep water.
Etymology
M. uchidai was initially described from a single shell that had washed up in a shallow water eelgrass meadow near the Akkeshi Marine Biological Station, Hokkaido by Tadashige Habe in 1958.[3] He named the species after Professor Tohru Uchida, who was the director of Akkeshi Marine Biological Station at the time.
References
- ^ a b c d Gulbin, V.V.; Golikov, A.N. (November 2000). "A review of the prosobranch family velutinidae in cold and temperate waters of the Northern Hemisphere IV: Velutininae. Genera Velutella, Cartilagovelutina and Marsenina". Ophelia. 53 (2): 141–149. doi:10.1080/00785236.2000.10409444. ISSN 0078-5326.
- ^ 北海道大学北方生物圏フィールド科学センター臼尻水産実験所付近の貝類 [Molluscan Fauna of Usujiri, Hokkaido] (PDF) (in Japanese). 北方圏貝類研究会 Northern Regions Shellfish Research Association. March 2009. pp. 28 and 60. ISBN 978-4-9904532-0-6.
- ^ a b Habe, Tadashige (June 1958). "The Fauna of Akkeshi Bay: XXV. Gastropoda (With Plates I-V)" (PDF). Publications from the Akkeshi Marine Biological Station. 8: 2–39.
- ^ Лебедев, Евгений Б.; Левенец, Ирина Р. (2019). "Фауна и распространение брюхоногих и двустворчатых моллюсков (Mollusca: Gastropoda, Bivalvia) на литорали Дальневосточного морского биосферного заповедника (залив Петра Великого, Японское море)" [Fauna and distribution of gastropods and bivalves (Mollusca: Gastropoda, Bivalvia) in the littoral zone of the Far Eastern Marine Biosphere Reserve (Peter the Great Bay, Sea of Japan)] (PDF). Юг России: экология, развитие (in Russian). 1: 26–41 – via CyberLeninka.
- ^ a b Gulbin, Vladimir V. (2010). "Review of the shell-bearing gastropods in the Russian waters of the East Sea. II. Caenogastropoda: Sorbeoconcha, Hypsogastropoda" (PDF). The Korean Journal of Malacology. 26 (2): 127–143 – via KoreaScience.
- ^ Гульбин, В.В.; Чабан, Е.М. (2012). "Аннотированный список раковинных брюхоногих моллюсков (Gastropoda) шельфа Командорских островов. Часть I" [Annotated list of shell-bearing gastropods of Commander Islands. Part I]. The Bulletin of the Russian Far East Malacological Society (in Russian). 15/16: 5–30.
- ^ Sasaki, Jun (January 2000). Fauna of fishery ground of hair crab, Erimacrus isenbeckii, off Hokkaido, in Okhotsk Sea (Technical report) (in Japanese). Abashiri Fisheries Research Institute. doi:10.13140/RG.2.1.3587.8646.
- ^ Gulbin, V. V. (March 2005). "Prosobranch family velutinidae (gastropoda) in cold and temperate waters of the northern hemisphere: history, biogeography, evolution and chorology". Ocean Science Journal. 40 (1): 45–54. doi:10.1007/BF03023464. ISSN 1738-5261.