''Bathynoe'' is a genus of marine

annelid The annelids (), also known as the segmented worms, are animals that comprise the phylum Annelida (; ). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to vario ...

s in the family

Polynoidae Polynoidae is a family (biology), family of marine Polychaete worms known as "scale worms" due to the scale-like elytron (Annelida), elytra on the dorsal surface. Almost 900 species are currently recognised belonging to 9 subfamilies and 167 gen ...

(scale worms). The genus includes 6 species, 5 of which occur in the Pacific Ocean while one occurs in the Atlantic Ocean. ''Bathynoe'' species have been recorded from depths of about 500 – 3000 m.

Description

Body short, 39 segments, 16 pairs of

elytra An elytron (; ; : elytra, ) is a modified, hardened forewing of beetles (Coleoptera), though a few of the true bugs (Hemiptera) such as the family Schizopteridae are extremely similar; in true bugs, the forewings are called hemelytra (sometime ...

. Anterior margin of

prostomium The prostomium (From Ancient Greek, meaning "before the mouth"; : prostomia; sometimes also called the "acron") is the Cephalization, cephalized first body segment in an annelid worm's body at the anterior end. It is in front of (but does not in ...

with a pair of acute anterior peaks. Lateral antennae inserted ventrally (beneath prostomium and median antenna). Palps, antennae, dorsal and ventral cirri with papillae. Notochaetae about as thick as neurochaetae. Unidentate and bidentate neurochaetae present.Ruff, R.E. (1991) A new species of Bathynoe (Polychaeta: Polynoidae) from the northeast Pacific Ocean commensal with two species of deep-water asteroids. Ophelia Supplement 5, 219–230 Species of ''Bathynoe'' may have about 28 to 43 segments and 10–24 pairs of

. The elytra are large but leave the middle of dorsum uncovered, they have several large mounds and are covered with much smaller conical microtubercles. The

is bilobed and cephalic peaks are absent, The median antenna is dorsal on the anteriormost part of the prostomium with the lateral antennae in a ventral position. The dorsal surface of the body has 1 to 3 tubercles on all or most segments. The

neuropodia In invertebrates, the term parapodium ( Gr. ''para'', beyond or beside + ''podia'', feet; : parapodia) refers to lateral outgrowths or protrusions from the body. Parapodia are predominantly found in annelids, where they are paired, unjointed late ...

are rounded and the

neurochaetae A chaeta or cheta (; ) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods. Polychaete annelids (''polychaeta'' literally mean ...

have transverse rows of very fine teeth and all have a simple unidentate tip.

Notochaetae A chaeta or cheta (; ) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods. Polychaete annelids (''polychaeta'' literally mean ...

are absent.

Species

Six valid species of ''Bathynoe'' are known as of September 2020: *'' Bathynoe abyssicola'' (Imajima, 2009) *'' Bathynoe cascadiensis'' Ruff, 1991 *'' Bathynoe nodulosa'' Ditlevsen, 1917 *'' Bathynoe pacifica'' Uschakov, 1950 *'' Bathynoe pustulata'' (Horst, 1915) *'' Bathynoe tuberculata'' (Treadwell, 1906)

References

{{Taxonbar, from=Q3917529 Taxa described in 1917 Phyllodocida Annelid genera