| 1a |
Body resembling a sac, without tentacles
and not divided into a pair of large lobes at the oral
end |
2 |
| 1b |
Body solid, not saclike, either with a pair of conspicuous tentacles
arising within sheaths on opposite sides of the body or with a pair of
large lobes at the oral end
(in which case there are small tentacles
of 2 types in the cavity enclosed by the oral
lobes) |
4 |
| 2a |
|
|
| 2b |
|
|
| 3a |
|
|
| 3b |
|
|
| 4a |
Body with a pair of large lobes at the oral
end; tentacles small,
of two types (a pair of branched tentacles
in sheaths near
the mouth, and numerous small tentacles
in tracts leading toward the mouth; both types are in the cavity enclosed
by the oral lobes) |
5 |
| 4b |
Body without a pair of large lobes at the oral
end; tentacles conspicuous
when extended, arising from sheaths
on opposite sides of the body some distance from the mouth |
6 |
| 5a |
Body surface smooth, colorless except for rows of darkly pigmented
spots in line with the comb rows, but nearer to the mouth than these; length
less than 12 (15) cm. |
Bolinopsis infundibulum |
| 5b |
Body surface covered with yellow-orange papillae; length sometimes
more than 20 cm (rare; an undescribed species) |
Leucothea sp |
| 6a |
Tentacle sacs opening
toward the aboral end of
the body; tentacles with
side branches (tentillae);
mouth and pharynx relatively
small |
7 |
| 6b |
Tentacle sacs opening
toward the oral end of the
body; tentacles without
side branches (tentillae);
mouth and pharynx relatively
large |
10 |
| 7a |
Tentacle sacs angling
away from the pharynx toward
the body surface for their entire length |
8 |
| 7b |
Tentacle sacs lying
close to the pharynx for
most of their length |
9 |
| 8a |
Body nearly spherical; tentillae
fairly numerous and not coiled into neat, pear-shaped bundles when contracted |
Pleurobrachia bachei |
| 8b |
Body somewhat ovoid and flattened in the tentacular plane; tentillae
sparse and coiled into neat pear-shaped bundles when contracted (an undescribed
species) |
Euplokamis dunlapae |
| 9a |
Body elongate, approximately cucumber-shaped, the length sometimes
attaining 10 cm; tentillae
sparse (rare) |
Hormiphora cucumis |
| 9b |
Body ovoid, up to 2 cm long; tentillae
numerous and crowded (tentacles red or pinkish purple, an undescribed species) |
Mertensia sp |
| 10a |
With only 4 meridional
digestive canals, these widely separated from the comb
rows; tentacles with
nematocysts (??), but
without colloblasts;
tentacle sheaths
very long, with orange to brick-red pigment at the tentacle bases and also
near the middle of the tentacle
sheaths (rare) |
Haeckelia rubra |
| 10b |
With 8 meridional
digestive canals, these directly beneath the comb
rows; tentacles without
nematocysts, but with
colloblasts; tentacle
sheaths short and sometimes containing red pigment (additional orange-brown
pigment may be present near the mouth and gonads) |
Dryodora glandiformis |