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

^^t).eM/-_
30 NATURALISTS, TOKUSHIMA, NO. 4,1992
Exopod 1
Epipod 1
Podobranch
Arttirobranch -
Pleurobranch
Maxillipeds
1 2 3
1
1
-
-
-
r
1
1
2
-
-
1
1
2
-
Pereopods
2 3
Etymology. The species is named for Torben Wolff, the 2toological Museum of
Copenhagen, Denmark, respected marine zoologist.
Remarks. The present species is the first Marcusiaxius record from the Pacific Ocean.
He is different from both Marcusiaxius colpos Kensley & Heart, 1991 and M. lemoscastroi
Rodrigues & Carvalho, 1972 from the Atlantic Ocean. M. speMe is more closely related
to M. lemoscastroi than to M. colpos; in M. spekai maxilliped 3 is provided with a very
short exopod; maxilliped 2 with a short exopod, while in M. lemoscastroi maxilliped 3
lacks the exopod, and maxilliped 2 has a short exopod, and in M. colpos maxilliped 3 with
the exopod overreaching distal meral margin, and maxilliped 2 with well-developed
exopod. The other characteristics of three species in Marcusiaxius are tablated as follows.
-
1
1
2
-
M. torbeni M. colpos M. lemoscastroi
Rostrum median carina widening in
posterior half.
Carapace fear setal rows in
anterolateral region.
Pereopod 1 merus with reduced tooth
at midlength of ventral
margin.
Telson 1/4 wider than midlength.
Distribution West Malay Peninsula
70 m.
-
1
1
2
-
barely demarked.
three setal rows
-
1
-
2
-
widening in whole
length.
same as in M.
colpos.
with small proximal strong tooth at
and large distal teeth. midlength.
1/3 wider than midlength. almost twice wider
than length.
Gulf of Mexico,
13-175 m.
Brazil-Venezuela,
15-18 m.