- Arms
- Arm formula: II=III=IV>I
- Arms II-IV ca. 60-70% of GL in squid larger than 35 mm GL.
- Armature in four series: arms I-III with 2 medial series of hooks (replaced by suckers at arm tips) and 2 marginal series of suckers; arm IV with suckers only.
- All arm suckers with similar dentition: Ca. 6-9 pointed teeth distally grading to smooth region proximally.
- Suckers of marginal suckers of arms III largest, followed by medial series of arms IV, then the marginal suckers of arms IV.
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Figure. Side and oral views of arm armature of G. pyros 39 mm GL. Left - Large hook and inner ring of a large marginal sucker of arm III. Right - Inner ring of large medial series sucker (left) and of large marginal sucker (right) of arm IV. Drawings from Young (1972).
- Tentacles
- Primary locking-apparatus with 4-6 thick ridges, each with medial sucker and alternating knobs. Locking apparatus separated proximally from suckers and knobs of tentacular stalk by large gap.
- Largest suckers of ventral-marginal series with 9-10 teeth on distal 2/3 of inner ring; teeth are more broadly spaced than teeth on arm suckers. These suckers about same size as largest arm III suckers.
- Dorsal margin of tentacular stalk with series of alternating suckers and pads along about 3/4ths of stalk length; distal few suckers each with additional small, thick ridge. Ridges are more prominent in this species than in the other California species.
- Ventral margin of tentacular stalk with single series of suckers about half of stalk length. Number of suckers in ventral series ca. 80-110% of those in dorsal series.
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Figure. Side and oral views of club armature of G. pyros 39 mm GL. A - Inner ring of largest sucker of ventral marginal zone. B - Inner ring of sucker from the middle of the dactylus, ventral series. C - Inner ring of a sucker taken one-fifth of the tentacle length from the base of the club. D - Central hook. E - Distal hook. F - First proximal hook. Drawings from Young (1972).
- Measurements and counts
Character/Station no. 7415 7415 7389 7412
Holotype
8031 8028 Sex - - - - - - Gladius length
35 38 40 39 42 31 Mantle width
10 10 12 10 11 9 Fin Length 15 15 17 14 - 12 Fin width 25 29 29 27 30 21 Arm length, I
19 20 24 22 23 15 Arm Length, II 23 25 27 27 27 17 Arm Length, III 22 24 27 26 26 18 Arm Length, IV
23 23 26 24 25 18 1/2 Arm I, sucker count*
31 29 30 29 30 27 Arm II, sucker count* 35 31 33 32 34 33 Arm III, sucker count* 34 31 31 30 34 31 Arm IV, sucker count* 41 38 38 38 38 33 Tentacle length 43 44 45 43 67 24 Club length 8 8 10 - 10 7 Club sucker count
170 180 181 168 174 180 Stalk sucker count (SSC), dorsal series 86 78 84 73 82 66 SSC, ventral series
74 68 72 68 85 56 SSC, medial region 104 67 57 85 91 70
Gonatus pyros: Description continued
Tsunemi Kubodera, F. G. Hochberg, and Richard E. YoungAbout This Page
National Science Museum, Tokyo, Japan
F. G. Hochberg
Santa Barbara Museum of Natural History, Santa Barbara, California, USA
University of Hawaii, Honolulu, HI, USA
Page copyright © 2006 , F. G. Hochberg, and
Page: Tree of Life
Gonatus pyros: Description continued
Authored by
Tsunemi Kubodera, F. G. Hochberg, and Richard E. Young.
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