Mastigoteuthis famelicaRichard E. Young
M. famelica is one of two common Mastigoteuthis species in the region of the Hawaiian Archipelago.
A Mastigoteuthis ...
- with large eyelid photophores but no other photophores.
- with protective membrane on tentacular club nearly absent.
- Club with barely detectable protective membranes.
- Club suckers uniform in size over club until club diameter diminishes near tip where suckers become smaller.
Figure. Four views of club of M. familica, preserved, neotype. Left - Oral view in midregion of club. Left middle - Side view in midregion of club at lower magnification. Right middle - Aboral view in midregion of club. The distnctive mantle pigmentation is seen in the background.Right - Oral view of club base. The separate sucker patches on the latter may be an artifact of damage. The tentacle is a bit shriveled from long preservation. Photographs by R. Young.
- Club suckers slightly elongate, 0.36 mm in length, with 2-3 large, blunt knobs on each side of outer ring that project into aperature. Inner ring with 2 or 3 tiny rounded teeth on distal margin.
- Fins longer than broad.
- Anterior and posterior fin lobes absent.
- Eyelid photophore present; other photophores absent.
M. famelica is very similar to M. atlantica from the central North Pacific in having large eyelid photophores, absence of all other photophores and fins that are slightly longer than wide. These two species clearly differ, however, in the size of the protective membrane on the tentacular clubs (well developed in M. atlantica and nearly absent in M. famelica). The small (37 mm ML, holotype) M. glaukopis from the Indian Ocean as described by Chun (1910) is very similar except for differences in the size and dentition of the club suckers. Since these latter features change with size, we can find no differences that separate M. glaukopis Chun, 1908 and it is probably synonymus with M. atlantica Joubin, 1933 or M. famelica Berry, 1909, but has priority over both. Until larger specimens of M. glaukopis are available from the Indian Ocean, we maintain all three species. We suspect, however, on the basis of the distinct protective membrane on the tentacular club in the illustrations of Chun (1910) that M. glaukopis and M. atlantica may be synonymus.
The holotype is no longer extant (Sweeney, et al., 1988) and we designate the specimen described here (immature female, 241 mm ML), Museum No.xxx, as the neotype. Nesis (1980) incorrectly synonymized this species (it had been incompletely described at the time as Chiroteuthis famelica) Berry, 1909 with Chiroteuthis (= Asperoteuthis) acanthoderma.
Two paralarval stages have been described. The slender shape and lobeless fins are easily recognizable by 7 mm ML.
Small multicuspid tubercles on mantle, funnel, head and aboral surface of arms seen in young of 17 - 40 mm ML. Most of the head tubercules are not visible in the photograph at the right but some on the funnel and its enlargement are visible.
Type locality: Vicinity of Kauai Island, Hawaiian Islands. Known only from the central north Pacific Ocean.
According to Young (1978), most specimens captured in his study were taken at depths between 675 and 800 m, both day and night. The two presummed contaminants were taken at 240 m during the day; the previous tow had fished at 700 m and captured three specimens.
Nesis, K. N. 1980. Taxonomic position of Chiroteuthis famelica Berry. Bull. Moscow Obslich. Ispyt. Prirody, Section Biology, 85: 59-66. [In Russian]
Sweeney, M.J., C.F.E. Roper, and F.G. Hochberg. 1988. Catalog of the type specimens of Recent Cephalopoda described by S. Stillman Berry. Malacologia, 29(1):7-19.
Young, R. E. 1978. Vertical distribution and photosensitive vesicles of pelagic cephalopods from Hawaiian waters. Fish. Bull., 76: 583-615.
Richard E. Young
Dept of Oceanography
University of Hawaii
Honolulu, Hawaii 96822
Page copyright © 2004 Richard E. Young
- First online 25 February 2004
Citing this page:
Young, Richard E. 2004. Mastigoteuthis famelica http://tolweb.org/Mastigoteuthis_famelica/19513/2004.02.25 in The Tree of Life Web Project, http://tolweb.org/. Version 25 February 2004 (under construction).