- Arms
- Arms I - with globular suckers distal to hooks.
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Figure. Oral view of arm I from P. hoylei. Top - female, right arm, distal region (with globular suckers). Bottom - male, left arm. ©
- Arms II - males can have enlarged hooks and hook sheaths.
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Figure. Right arm II of a male P. hoylei. Top - 4 hooks with sheaths intact. Bottom - 4 hooks with sheaths removed. ©
- Arm IV - right.
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Figure. A female P. giardi (with no suckers or hooks). Stained faintly with methylene bllue (green color). ©
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Figure. Oral view of male for P. hoylei. Top - 1 sucker and 2 hooks visible. Bottom - a recently preserved specimen with hooks, protective membranes, and chromatophores between membranes still visible. ©
- Arm IV - hectcotylus
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Figure. Hectocotylus (left arm IV) from a male P. hoylei. Top/Left - close-up view of hectocotyus teeth. Bottom/Right - complete view of hectocotylized arm. ©
- Close-up of hectocotylus membrane (with numerous ridges and 2 large teeth)
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Figure. Lateral side view of the hectocotylus plate and surrounding membranes from P. hoylei. ©
- Arms I - with globular suckers distal to hooks.
- Tentacle club suckers in 4 even series.
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Figure. Oral view of tentacle club for a female P. hoylei. ©
- Head
- Buccal crown with ridges only.
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Figure. Oral view of the buccal membrane of a male P. hoylei. Note ridges that run along buccal membrane. ©
- Buccal crown with ridges only.
- Photophores
- Visceral photophores
- 1 abdominal organ (with 3 additional small organs anterior - posteriormost not visible in picture below).
- 2 branchial organs.
- 2 anal organs (smaller than branchial).
- Eye photophores with 10 large and 5 minute organs.
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Figure. Ventral view of the small eye photophores of P. hoylei. ©
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Figure. Ventral view of visceral photophores in a female P. hoylei. ©
- Visceral photophores
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ToL notes provide brief accounts of characteristics, short summaries, commentaries, media files, taxonomic information, or identification tools for a given group of organisms.
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