Poseidonemertes collaris

Sequence Data:  16S, COI

Observed in Coos Bay: Nov-Jan

The larvae of the intertidal hoplonemertean Poseidonemertes collaris have two eyes and two anterior red streak-like patches, a green gut and conspicuous cerebral ganglia. At their posterior, they sometimes have a caudal cirrus and a small epidermal indentation. A mid-ventral longitudinal epidermal groove is more or less apparent.

General larval morphology = vermiform, oval or round

Larval ciliation = uniform

Larval eyes = present

Larval eyes = sub-epidermal

Apical tuft = inconspicuous

Larval characters = several pairs of eyes and no statocysts

Larval behavior = rolls into a sphere readily

Larval pigment = red pigment anteriorly