Syllipsimopodi
Syllipsimopodi | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Clade: | Vampyropoda
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Genus: | †Syllipsimopodi Whalen & Landman, 2022[1] |
Species: | †S. bideni
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Binomial name | |
†Syllipsimopodi bideni Whalen & Landman, 2022[1]
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Syllipsimopodi is an extinct member of the
Taxonomy
A subsequent study doubted the assignment of Syllipsimopodi to Vampyropoda and suggested it to be a junior synonym of Gordoniconus beargulchensis.[4] The original authors still consider it to be a separate genus and species but suggested further analyses might be needed to firmly place it in Vampyropoda.[5]
Description
Individuals were 12 cm (4.7 in) long and had 10 arms with suckers, with two of the arms being longer than the others.[3] It is currently considered the oldest known vampyropod by some but certainly the oldest known cephalopod with biserial suckers on its ten robust appendages.[3] The lead author of S. bideni states that it is possibly the only known vampyropod - if it really can considered one [6] - that has 10 functional appendages, with all other species having eight arms, suggesting that their ancestors had ten arms.[1][7] The arms measure to about ~2.1 to 2.4 mm wide at the midlength. Two of the arms measure in at ~4.0 to 4.1 cm long, making up 27% of the total body length. The elongated arms do not have obvious manus and are thinner than the other arms. The suckers are based along the midlength and are ~0.62 mm in diameter and are separated by ~0.5 mm. There is no evidence that the suckers were stalked. A possible funnel measuring ~2.4 mm long was preserved with a lateral edge of the head.[1]
References
- ^ PMID 35260548.
- ^ Imbler, Sabrina (8 March 2022). "Fossil of Vampire Squid's Oldest Ancestor Is Named for Biden". The New York Times. Retrieved 8 March 2022.
- ^ a b c d Strickland, Ashley (8 March 2022). "Fossil of 328 million-year-old octopus relative still has suckers on its arms". CNN. Retrieved 8 March 2022.
- PMID 38062003.
- PMID 38086818.
- PMID 38062003.
- ^ "Octopus ancestor with 10 arms named after President Joe Biden". www.nhm.ac.uk. Retrieved 2022-05-25.