Researchers Erect New Squid Family From 1 Antarctic Specimen Found in 1955

1 articles · Updated · spacedaily.com · Aug 15

A single 175-millimetre squid pulled from a sperm whale’s stomach in the 1955–56 Antarctic whaling season has been reclassified as Mobydickia poseidonii, the only known member of the new family Mobydickidae.
Anatomical traits drove the split: the preserved specimen lacked expected photophores and showed unusual fin proportions, beak, internal shell and trident-like arm hooks that did not match any recognized oceanic squid family.
The finding emerged during a revision of Ancistrocheirus based on 46 specimens; DNA helped separate at least six lineages there, but the old holotype yielded no genetic sequence, so Mobydickidae rests on comparative anatomy alone.
The paper says Mobydickidae is the first new oceanic squid family erected since bigfin squid family Magnapinnidae in 1998, underscoring how rarely a single museum specimen redraws the squid family tree.
Only 1 specimen is known, with no confirmed habitat, sex or live observations, highlighting how museum collections and even whale-stomach finds can reveal deep-ocean species that standard sampling still misses.