go to the Tree of Life home page
advanced
Under Construction
This is an archived version of a Tree of Life page. For up-to-date information, please refer to the current version of this page.

Notonykia Nesis, Roeleveld & Nikitina, 1998

Notonykia africanae Nesis, Roeleveld & Nikitina, 1998

Michael Vecchione, Richard E. Young, and Kotaro Tsuchiya
At present this genus has a single species.
Containing group: Onychoteuthidae

Introduction

Notonykia africanae, the single species in this genus, is known from a maximum size of about 130 mm ML, but mature squid are unknown. The most distinctive features of this genus are the intermediate number of occipital folds, and the high number of suckers on the distal portion of the club. These suckers cover the terminal pad and the distal portion of the club proper.

Diagnosis

An onychoteuthid ...

Characteristics

  1. Tentacles
    1. Marginal suckers absent.
    2. Suckers on tip of club and terminal pad.
       image info

      Figure. Oral view of the tip of the tentacular club of N. africanae, 40 mm ML. Photograph by R. Young.

  2. Head
    1. 6-7 occipital folds on each side in subadults

      The arrow in the photograph to the left points to the olfactory organ on occipital fold no. 2.

       image info  image info

      Figure. Dorsolateral views of the head of N. africanae. Left - 5 of the 6 occipital folds visible, 69 mm ML, preserved. The arrow points to the olfactory organ on occipital fold no. 2. Photograph by R. Young. Right - 6 of the 7 occipital folds visible (fold no. 1 not visible), holotype. Drawing modified from Nesis, et al. (1998).

  3. Mantle
    1. Skin smooth.
    2. Gladius visible dorsally only between fins.
       image info

      Figure. Dorsal view of mantle and fins of N. africanae, 69 mm ML. Photograph by R. Young.

  4. Photophores
    1. Absent.

Comments

Except for the photographs, this description is from Nesis et al. (1998).

Additional features of the description can be found here.

Nomenclature

According to Nesis et al. (1998), they erected this genus for squid that had previously been identified as a "Notalian form" of Onychoteuthis banksi or as Onykia (?) verrilli (Pfeffer).

Life History

At 18 mm ML the gladius in Notonykia africanae is visible dorsally only between the fins; the rostrum of the gladius, in contrast to species of Onychoteuthis, is not needle-like and does not appear to pierce the skin. Positive identification of juveniles depends on the appearance of occipital folds. Only three occipital folds are visible by 18 mm ML. This data is from Nesis et al., 1998.

 image info

Figure. Apparent growth stages of N. africanae. A, B - Dorsal views of squid of 9.5 (A) and 14.5 mm ML (B); these paralarvae are only assumed to be N. africanae. C, D - Ventral and dorsal views, paratype, 73 mm ML. Scale bar is 5 mm for Figs. A and B, 1 cm for Fig. D. Drawings modified from Nesis, et al. (1998).

Distribution

Notonykia africanae is thought to be circumpolar in the subantarctic region between 30° - 53°S (Nesis, et al., 1998).

 image info

Figure. Distribution chart of N. africanae. The map includes the location of the type series and literature records from Nesis et al. (1998). Chart modified from Nesis (1998).

References

Nesis, K. N., M. A. C. Roeleveld and I. V. Nikitina. 1998. A new genus and species of onychoteuthid squid from the Southern Ocean. Ruthenica 8:153-168.

Title Illustrations
Scientific Name Notonykia africanae
Reference Nesis, K. N., M. A. C. Roeleveld and I. V. Nikitina. 1998. A new genus and species of onychoteuthid squid from the Southern Ocean. Ruthenica 8:153-168.
Sex Female
Size 125 mm ML
Type Holotype
Copyright © Ruthenica
About This Page



National Marine Fisheries Service
Systematics Laboratory
National Museum of Natural History
Washington, D. C. 20560
USA

Richard E. Young

Dept of Oceanography
University of Hawaii
Honolulu, Hawaii 96822
USA



Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Vecchione, Michael, Young, Richard E., and Tsuchiya, Kotaro. 2003. Notonykia Nesis, Roeleveld & Nikitina, 1998. Notonykia africanae Nesis, Roeleveld & Nikitina, 1998. Version 01 January 2003 (under construction). http://tolweb.org/Notonykia_africanae/19954/2003.01.01 in The Tree of Life Web Project, http://tolweb.org/

close box

This page is a Tree of Life Leaf Page.

Each ToL leaf page provides a synopsis of the characteristics of a group of organisms representing a leaf at the tip of the Tree of Life. The major distinction between a leaf and a branch of the Tree of Life is that a leaf cannot generally be further subdivided into subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Notonykia africanae

Page Content

Articles

Notes

Treehouses

Explore Other Groups

random page

top