Facts about Promachoteuthis

1. 06

   Specimens of Promachoteuthis sulcus display arm morphology featuring suckers arranged in a pattern distinct from most other known squid genera, though detailed comparative analysis remains limited due to the single preserved individual.

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2. 05

   At approximately 25 millimeters in mantle length, Promachoteuthis sulcus ranks among the smallest known deep-sea squid species ever recovered.

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3. 04

   Only one specimen of Promachoteuthis sulcus has ever been scientifically documented, making it one of the rarest known cephalopod species with extremely limited morphological data.

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4. 03

   Promachoteuthis sulcus exhibits unusually large eyes relative to its body size, a characteristic typical of deep-sea cephalopods adapted to low-light environments.

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5. 02

   Promachoteuthis sulcus possesses a rounded, bulbous head with a distinctive beak-like mouth structure adapted for deep-sea predation.

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6. 01

   The lone specimen of Promachoteuthis sulcus was collected in 1907 from the South Atlantic Ocean at a depth of approximately 600 meters.

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