About | Search taxa | Taxon tree | Search literature | Specimens | Distribution | Checklist | Stats | Log in

Polychaeta source details

Sato, Misanori. (2020). Two new species of Composetia (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, Southern Japan, with a list of all species currently belonging to Composetia. Species Diversity. 25(1): 11-24.
365236
10.12782/specdiv.25.11 [view]
urn:lsid:zoobank.org:pub:1E0F263F-FDA3-4AB8-B93E-DD534C3B1CD0 [view]
Sato, Misanori
2020
Two new species of <i>Composetia</i> (Annelida: Nereididae) from small estuaries in the Ryukyu Islands, Southern Japan, with a list of all species currently belonging to <i>Composetia</i>
Species Diversity
25(1): 11-24
Publication
World Polychaeta Database (WPolyDb). Published online: '1 January 2020'
Available for editors  PDF available [request]
Two new species Composetia kumensis and C. tokashikiensis (Nereididae) are described based on specimens collected from subtropical small estuaries in the Kume-jima and Tokashiki-jima islands in the middle Ryukyu Islands, southern Japan, respectively. Both species have the following diagnostic characteristics of Composetia Hartmann-Schröder, 1985: (1) having conical paragnaths in the maxillary ring of the proboscis and lacking paragnaths or papillae in the oral ring, (2) prostomium with entire anterior margin, (3) the absence of falcigers among notochaetae, and (4) the absence of simple chaetae among upper neurochaetae. These new species share the following diagnostic characters: (1) presence of notoacicula on chaetigers 1 and 2, (2) absence of notopodial prechaetal lobe throughout body, (3) presence of neuropodial postchaetal lobe only in anterior body, (4) neuropodial falcigers all heterogomph, and (5) oral ring greatly enlarged in full-everted proboscis. However, C. tokashikiensis sp. nov. is distinguishable from C. kumensis sp. nov. by the presence of heterogomph spinigers among the upper neurochaetae around chaetiger 5. A list of all of 34 species currently belonging to Composetia and a key to Japanese species of Composetia are also provided.
Japan
Systematics, Taxonomy
RIS (EndNote, Reference Manager, ProCite, RefWorks)
BibTex (BibDesk, LaTeX)
Date
action
by
2020-01-03 01:29:46Z
created

Composetia Hartmann-Schröder, 1985 (identification resource)
Composetia kumensis Sato, 2020 (original description)
Composetia tokashikiensis Sato, 2020 (original description)
Holotype NSMT Pol H-766, geounit Ryukyu Islands, identified as Composetia kumensis Sato, 2020
Holotype NSMT Pol H-774, geounit Ryukyu Islands, identified as Composetia tokashikiensis Sato, 2020
Paratype NSMT Pol P-767-770, geounit Ryukyu Islands, identified as Composetia kumensis Sato, 2020
Paratype NSMT Pol P-771, 772, geounit Ryukyu Islands, identified as Composetia kumensis Sato, 2020
Paratype NSMT Pol P-773, geounit Ryukyu Islands, identified as Composetia kumensis Sato, 2020
Paratype NSMT Pol P-775-783, geounit Ryukyu Islands, identified as Composetia tokashikiensis Sato, 2020
Paratype NSMT Pol P-784, geounit Ryukyu Islands, identified as Composetia tokashikiensis Sato, 2020
 Depth range

Upper intertidal zone of uplifted coral reef. [details]

 Depth range

Intertidal. [details]

 Distribution

Pacific Ocean: Kume-jima (Ryukyu Islands, southern Japan). [details]

 Distribution

Pacific Ocean: Tokashiki-jima (Ryukyu Islands, southern Japan). [details]

 Etymology

The specific epithet kumensis is an adjective derived from the name of the type locality, Kume-jima. [details]

 Etymology

The specific epithet tokashikiensis is an adjective derived from the name of the type locality, Tokashiki-jima. [details]

 Habitat

Sandy bottom with pebbles in a small creek originating from a freshwater spring within the upper intertidal zone of ... [details]

 Habitat

Intertidal sandy bottom in the upper reaches of small estuary. Salinity of interstitial water that drained into the ... [details]

 Reproduction

Coelom of two paratypes collected in March 2007 filled with large oocytes (about 250 μm and 150 μm, respectively, ... [details]

 Reproduction

Coelom of a paratype collected in November 1991 filled with large oocytes (about 250 μm in maximum diameter). None ... [details]

 Type locality

Gushicha Gusuku, on Kume-jima Island, Okinawa Prefecture, central Ryukyu Islands, southern Japan, Pacific Ocean ... [details]

 Type locality

Estuary of Tokashiki-gawa river, Tokashiki-jima Island, Okinawa Prefecture, central Ryukyu Islands, southern Japan, ... [details]