Aphelochaeta antelonga is a species of
bitentaculate cirratulidan first found in the
Pacific
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...
coast of Costa Rica, at a shallow
subtidal
The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth.
From the point of view of marine biology it forms a relatively stable and well-illuminated ...
depth of about in the
Gulf of Nicoya
The Gulf of Nicoya ( es, Golfo de Nicoya) is an inlet of the Pacific Ocean. It separates the Nicoya Peninsula from the mainland of Costa Rica, and encompasses a marine and coastal landscape of wetlands, rocky islands and cliffs.
The first Spanish ...
. It is characterised by possessing a long biannulate
peristomium The peristomium is the first true body segment in an annelid worm's body in the anterior end. It is directly behind the prostomium and contains the mouth, tentacular cirri, and sometimes feeding palps, which may instead occur on the prostomium. If ...
and fibrillated capillary
seta
In biology, setae (singular seta ; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms.
Animal setae
Protostomes
Annelid setae are stiff bristles present on the body. Th ...
e.
[Dean, Harlan K., and James A. Blake. "Aphelochaeta (Polychaeta: Cirratulidae) from the Pacific coast of Costa Rica, with a description of five new species." Zootaxa 4103.2 (2016): 101-116.]
References
Terebellida
{{Annelid-stub