Naineris furcillata

Blake, James A., 2017, Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America, Zootaxa 4218 (1), pp. 1-145 : 97-98

publication ID

https://doi.org/ 10.5281/zenodo.245827

publication LSID

lsid:zoobank.org:pub:9345C596-8656-4B5C-AD8C-2FACF4E9240C

DOI

https://doi.org/10.5281/zenodo.4901811

persistent identifier

https://treatment.plazi.org/id/8F2387DD-0675-096C-FF31-FF7CFB91FBCF

treatment provided by

GgServerImporter

scientific name

Naineris furcillata
status

 

Naineris furcillata View in CoL new name

Figure 45 View FIGURE 45

Naineris chilensis Carrasco, 1977: 70 View in CoL –72, figs. 5–6, homonym of N. dendritica chilensis Hartmann-Schröder, 1965 View in CoL ; Rozbaczylo 1985: 130.

Material examined. Argentina, Staten Island off Tierra del Fuego, Hero Cruise 712, Sta. 664 (1, USNM 60639 About USNM ) . — Strait of Magellan, Eltanin Cruise 11, Sta. 960 (1, USNM 60638 About USNM ) .

Description. Both specimens posteriorly incomplete, with largest (USNM 60639) 23 mm long, 2 mm wide for 64 setigers. Color in alcohol: light tan to brown.

Prostomium blunt, with slightly rounded frontal margin ( Fig. 45 View FIGURE 45 A); no eyespots; peristomium a simple achaetous ring, ventrally forming lips of mouth; proboscis partially everted, appearing dendritic. Thoracic region with 17–19 setigers, appearing dorsally compressed; 1–2 transitional segments present between thorax and abdomen; abdominal region cylindrical.

Branchiae from setiger 4, continuing to posterior end; each branchia flattened, cirriform, tapering to pointed tip ( Fig. 45 View FIGURE 45 F–G), ciliated on inner margins; branchiae of posterior segments flatter and broader ( Fig. 45 View FIGURE 45 H).

Thoracic notopodial postsetal lobe elongate, thin, and fingerlike, with forked tips by setiger 17–18 ( Fig. 45 View FIGURE 45 G); subsequent notopodial lobes and those of posterior segments forked ( Fig. 45 View FIGURE 45 H) or undivided; occurrence of forked notopodial lobes irregular from segment to segment; interramal cirrus absent. Thoracic neuropodia slightly thickened, with short, fingerlike postsetal lobe from setiger 1 ( Fig. 45 View FIGURE 45 F); abdominal neuropodia divided into two apical lobes, between which setae emerge ( Fig. 45 View FIGURE 45 H).

Thoracic notopodia with 30–40 long, crenulated capillaries and 3–5 furcate setae; abdominal notopodia with few capillaries and furcate setae; each furcate seta with unequal tynes having blunted, bifid tips; tynes connected by a thin membrane composed of very fine needles, shafts with transverse ribs ( Fig. 45 View FIGURE 45 E).Thoracic neuropodia with dense fascicles of uncini ( Fig. 45 View FIGURE 45 B) and crenulated capillaries ( Fig. 45 View FIGURE 45 C); each uncinus with transverse ribs; abdominal neurosetae reduced to a few crenulated capillaries and 1–2 smooth, slightly curved aciculae ( Fig. 45 View FIGURE 45 D).

Etymology. furcillata: Latin for forked.

Remarks. Naineris chilensis Carrasco, 1977 is a junior homonym of N. dendritica chilensis Hartmann- Schröder , 1965 and is herein renamed N. furcillata . The specimens described here are considered to represent the same species as Carrasco’s material from western Chile. The type specimens of Carrasco’s species were requested but were not provided. Naineris furcillata is unique in the genus in having the posterior thoracic and abdominal notopodial postsetal lobes and abdominal neuropodia with bifid or forked tips. The occurrence of forked or undivided lobes in the notopodia is variable from segment to segment, but consistent in the neuropodia; Carrasco’s holotype is depicted as having only the neuropodial lobes forked.

Distribution. Argentina, Patagonian region; Chile, Strait of Magellan; 10– 64 m.

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Orbiniidae

Genus

Naineris

Loc

Naineris furcillata

Blake, James A. 2017
2017
Loc

Naineris chilensis

Rozbaczylo 1985: 130
Carrasco 1977: 70
1977
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