''Benhamisetosus'' is a genus of marine

annelids 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 ...

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 contains a single species, ''Benhamisetosus australiensis'', known from the south coast of

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

and the

Tasman Sea The Tasman Sea is a marginal sea of the South Pacific Ocean, situated between Australia and New Zealand. It measures about across and about from north to south. The sea was named after the Dutch explorer Abel Janszoon Tasman, who in 1642 wa ...

.Averincev, V. G. (1978). The Polychaetous Annelids of the Aphroditiformia of the Shelf and Upper Bathial of Australian and New Zealand Region and of Macquarie Island (on the Base Data of 16th Cruise of R/V Dmitri Mendeleev).]. Transactions of the P.P.Shirov Institute of Oceanology Academy of Sciences of the USSR, Moscow. 113: 51-72.

Description

In ''Benhamisetosus australiensis'' the number of pairs of Elytron (Annelida), elytra is unknown since the

type Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * ...

specimens are incomplete. The lateral antennae are inserted ventrally (beneath the

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 ...

and median antenna) and 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 elongate and tapering. The

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 about as thick as 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 ...

. The neurochaetae each have a distinctive half-moon shaped pocket on one side formed by a curved row of fine teeth, and neurochaetae with both unidentate and bidentate tips are present.Benham, W.B. (1915). art 1Report on the Polychaeta obtained by the F.I.S. 'Endeavour' on the coasts of New South Wales, Victoria, Tasmania and South Australia, Part 1. Biological Results of the Fisheries Expedition F.I.S. Volume 3(4). 171–237. H.C. Dannevig. Sydney.

References

{{Taxonbar, from=Q1889456 Phyllodocida