Laonome kroeyeri Malmgren, 1866
|Laonome kroeyeri in its tube. The tube is about 1 cm in diameter and 25 cm long. This individual was caught by otter trawl at about 75 m depth in the San Juan Channel.|
|(Photo by: Dave Cowles, July 2008)|
How to Distinguish from Similar Species:Sabellastarte sp has only limbate or slightly spatulate setae on the thoracic notopodia and the uncini are almost S-shaped. Eudistylia spp such as Eudistylia vancouveri have some pickaxe-shaped neuropodial setae.
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General Notes and Observations: Locations, abundances, unusual behaviors:
This view shows the entire animal outside its tube.
This closeup view of the tube shows how the tip of the tube (to the right) curls over and covers the end when the animal is not sticking out.
In this view the ocelli
(dark spots) can be seen on the radioles.
The ocelli can sense
light and dark, allowing the animal to pull rapidly inside its tube when
a shadow passes over it.
In this view of the thoracic parapodia the neuropodia (above, directly facing the camera) can be seen to be short-handled, avicular uncini (or with no handles at all) that are in a straight or slightly sinuous line. The notopodia (below) have both long limbate and shorter spatulate setae. This is a view of the left side of the animal which is outside its tube. The animal's ventral side (smooth, white) is up in this photo.
|These two views show more detail of the thoracic setae. The ventral neuropodia are in the left photo and the dorsal notopodia are in the right photo.|
|Thoracic neuropodia. Head is to the top and ventral side is to the left. The thoracic neuropodial setae consist of nearly straight avicular uncini with short or no handles. The notopodia can be seen to the right.||Thoracic notopodia (top). The head is to the right and the dorsal side is on the top. The thoracic notopodial setae consist of long limbate setae and shorter spatulate setae. The neuropodia can be seen below the notopodia.|
This view shows the ventral side of the animal's head. Its mouth can be seen at the base of the radioles.
In this photo of the left side of the animal, head to the right and ventral side upward, the junction between the thorax and abdomen can be seen near the middle of the picture. At the junction the dorsal notopodial setae (lower row) change from long limbate and spatulate setae on the thorax to short setae on the abdomen, while the ventral neuropodial setae (upper row) change from short avicular uncini to longer setae.
Ths view of the posterior end of the worm (left side) shows the pygidium.