A review of the genus Muusoctopus (Cephalopoda: Octopoda) from Arctic waters
Golikov, Alexey V.; Gudmundsson, Gudmundur; Blicher, Martin E.; Jørgensen, Lis Lindal; Korneeva, Ekaterina I.; Olafsdottir, Steinunn H.; Shagimardanova, Elena I.; Shigapova, Leyla H.; Zakharov, Denis V.; Zimina, Olga L.; Sabirov, Rushan M.
Peer reviewed, Journal article
Published version
Permanent lenke
https://hdl.handle.net/11250/3106813Utgivelsesdato
2023Metadata
Vis full innførselSamlinger
- Articles [3043]
- Publikasjoner fra CRIStin [3126]
Sammendrag
We report two Arctic species of incirrate octopods new to science. One is formally described here as Muusoctopus aegir Golikov, Gudmundsson & Sabirov sp. nov. while the other, Muusoctopus sp. 1, is not formally described due to a limited number of samples (all are immature individuals). These two species differ from each other, and from other Muusoctopus, especially in: 1) absence of stylets (in M. aegir sp. nov.); 2) proportions of mantle and head; 3) funnel organ morphology (W-shaped with medial and marginal limbs of equal length in M. aegir sp. nov., or medial are slightly longer; V V-shaped with medial limbs slightly longer and broader than marginal in Muusoctopus sp. 1); 4) sucker and gill lamellae counts; 5) relative arm length and sucker diameter; and 6) male reproductive system relative size and morphology. Species of Muusoctopus now comprise four of 12 known Arctic cephalopods. Additionally, this study provides: a) new data on the morphology and reproductive biology of M. johnsonianus and M. sibiricus, and a diagnosis of M. sibiricus; b) the equations to estimate mantle length and body mass from beak measurements of M. aegir sp. nov. and M. johnsonianus; c) a cytochrome c oxidase subunit I gene barcode for M. sibiricus; d) new data on the ecology and distribution of all studied species; and e) a data table for the identification of northern North Atlantic and Arctic species of Muusoctopus.