Les Thalassinidea (Crustacea, Decapoda) du ... - AToL Decapoda

SAKAI: CALLIANIDEIDAE AND THALASSINIDAE 25
short simple appendix interna with distal hooks, while on the right side only with
appendix interna. Examination of additional material is necessary to show whether this
asymmetory is an abnormality. Pleopods 3-5 biramous, rami broad with appendix
interna. Uropodal exopod largely rounded distolaterally, and uropodal endopod slightly
longer than wide, slightly produced distolaterally. Telson (Fig. 7A) longer than uropod,
posterior margin evenly convex, unarmed, and lateral margin convex in posterior two
thirds.
Exopod 1
Epipod 1
Podobranch
Arthrobranch -
Pleurobranch
Maxillipeds Pereopods
1 2 3 1 2 3 4 5
1
1
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1
1
2
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1
1
2
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Etymology. The species is named for the research vessel, "Soela", occuring a cruise of
which the present specimen was collected.
Remarks. The present species is closely related to Metkonaxhis monodon De Man, 1905,
from off the north-east point of Java. In M. monodon the posterior margin of the telsOn
is truncate; in pereopod 1, the merus possesses a tooth on the ventral margin; abdominal
somites 3-5 have dense setae.
Genus Marcusiaxius Rodrigues & Carvalho, 1972
Marcusiwdus Rodrigues & Carvalho, 1972:357; Kensley & Heard, 1991:506.
Diagnosis. Carapace compressed, and posterolateral margin angular; rostrum distinct,
and middorsally with flattened triangular area at the same level as anterior portion of
carapace; anterodorsal submarginal pile of dense setae present. Anterolateral region of
carapace with three setal rows. Cervical groove obsolete. Thoracic sternum articulated
to pereopod 4 with a concave structure. Abdominal somite 1 with lateral anterodorsal
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1
1
2
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1
2
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