SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY • NUMBER 543 ...

NUMBER 543 69
Rostrum unarmed in dorsal midline 62
58. Rostrum armed ventrally 59
Rostrum unarmed ventrally 60
59. Carapace bearing antennal spine Propontonia
(Kenya, Zanzibar, Comoro Islands, Seychelles,
Great Barrier Reef of Australia;
associated with alcyonarians)
Carapace without antennal spine Mesopontonia
60. Carapace without antennal spine Waldola
(Pacific coast of America
from Mexico to Colombia)
Carapace with antennal spine 61
61. Second pereopods very unequal; 3rd pereopod with strong basal protuberance on
dactyl Hamodactyloides
(Red Sea, Kenya, Zanzibar, La Reunion, Ryukyu
Islands, Great Barrier Reef of Australia;
associated with hydroid Millepora)
Second pereopods equal; 3rd pereopod with dactyl slender, without basal
protuberance Hamodactylus
62. Rostrum with lateral carina feebly expanded into unarmed supraorbital eave; 2nd
pereopods subequal and similar, merus and ischium dentate on flexor margins
Miopontonia
(Off Western Australia; 40 m)
Rostrum with lateral carina expanded into broad, anteriorly dentate supraorbital
eave; 2nd pereopods unequal, similar or not, merus and ischium unarmed on flexor
margins 63
63. Carapace and abdomen distinctly sculptured, former with deep branchiostegal sinus
anteroventrally; major 2nd pereopod without proximal tooth on flexor margin of
movable finger Coutierea
(West Indies; 148 or 165-172 m)
Carapace and abdomen smooth, not sculptured, former without branchiostegal sinus
anteroventrally; major 2nd pereopod with large proximal tooth on flexor margin of
movable finger Lipkebe
(Eastern Gulf of Mexico and off Brazil;
119-150 m, associated with crinoids)
64. Carapace bearing antennal spine 65
Carapace without antennal spine 68
65. Carapace with longitudinal branchiostegal suture; abdomen with pleuron of 5th
somite sharply acute posteriorly Pseudocoutierea
(Pacific America from southern California to
Galapagos Islands, Leeward Islands, and
Caribbean coast of Colombia; 13-91 m,
associated with gorgonians)
Carapace without branchiostegal suture; abdomen with pleuron of 5th somite
rounded 66
66. Carapace with deep pterygostomian notch at anterolateral angle
Pseudopontonides
(Northern Gulf of Mexico and Netherlands Antilles;
associated with antipatharians and alcyonarians)
Carapace without notch at pterygostomian angle 67
67. Rostrum distinctly overreaching anteriorly extended eyes, lateral carina not broadly
expanded as supraorbital eave Neopontonides
(Pacific America from Gulf of California
to Ecuador, associated with gorgonians)