Download Antarctic and Subantarctic Pycnogonida: Ammotheidae and by C. Allan Child PDF

By C. Allan Child

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Published via the yankee Geophysical Union as a part of the Antarctic study Series.

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Antarctic and Subantarctic Pycnogonida: Ammotheidae and Austrodecidae

In regards to the ProductPublished through the yank Geophysical Union as a part of the Antarctic study sequence. content material:

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These t w o additional collections extend this distribution to the west o f South Island, N e w Zealand, in 1463 m, and to the north o f its previously k n o w n distribution, east ( 3 6 ° S ) o f North Island in 2 5 0 5 m. Diagnosis. A rather large species, classed among the giants o f the g e n u s , w i t h a leg span o f about 180 m m . It shares characters with the other giants: large dorsomedian trunk tubercles, slender 2-segmented scapes, a long abdomen, a r o w o f lateral cement gland pores o n more than o n e leg segment o f males, and a tarsus o f almost the same length as the propodus.

T h e s e records appear to reflect a frequency o f collect­ ing in more accessible areas rather than in difficult areas s e l d o m or never approached and probably do not reflect the p o s s i b l e rarity or true distribution o f the species. Copyright American Geophysical Union Antarctic Research Series Vol. 63 28 B I O L O G Y OF THE A N T A R C T I C S E A S XXIII Diagnosis. Size moderately small. Trunk with tall conical setose tubercles o n segmentation ridges, lateral processes w e l l separated, w i t h paired, small, pointed, dorsodistal tubercles.

Proboscis Achelia-like, long. A b d o m e n short. Chelifores short, slender, chelae atrophied. Palps l o n g , typical, 9-segmented. L e g s lightly setose, femur w i t h field o f short dorsal setules, propodus w i t h f e w short heel spines, field o f sole spinules, long slender c l a w and short auxiliary claws. All 8 l e g s w i t h distal segments alike. Remarks. This species is conspicuous because o f its small adult size and its superficial similarity to A. clausi. It differs from the latter by having taller dorsomedian trunk tubercles, a more rounded ocular tubercle, shorter abdomen, much narrower proboscis, inconspicuous heel spines, and smaller size, as m e n ­ tioned.

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