Berkeleyia weddellia, Blake, James A., 2017

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 : 14

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.4901737

persistent identifier

https://treatment.plazi.org/id/8F2387DD-0618-0900-FF31-FCAFFCFBF91E

treatment provided by

GgServerImporter

scientific name

Berkeleyia weddellia
status

sp. nov.

Berkeleyia weddellia View in CoL new species

Figure 4 View FIGURE 4

Material examined. Antarctica , Weddell Sea, ANDEEP III, R/ V Polarstern, Sta. PS 67/078- 4, 21 Jan 2005, 71°9.49′S, 13°59.92′W, 2164 m, holotype ( ZMH P-27782). GoogleMaps

Description. A single incomplete specimen 4 mm long, 0.4 mm wide across thorax for 28 setigers. Color in alcohol: light tan, without pigment. Thoracic region with 11 setigers; body cylindrical in cross section, weakly flattened dorsally, abdominal segments cylindrical in cross section.

Prostomium conical, triangular in shape, tapering to narrow pointed apex ( Fig. 4 View FIGURE 4 A–B); without eyespots; nuchal organs paired notches on anterior margin of peristomium ( Fig. 4 View FIGURE 4 A). Peristomium with a single achaetous ring, slightly narrower than setiger 1, but similar in length.

Thorax with short, conical notopodial postsetal lobes from setiger 1, increasing in length and shape over thoracic region, initially minute, rounded, then becoming triangular at base narrowing to pointed apex by setiger 8 ( Fig. 4 View FIGURE 4 A); neuropodia similar to notopodia with elongate postsetal lobe with triangular base near end of thoracic region; abdominal segments denoted by shift of parapodia dorsally, and abrupt change in notopodia to long, narrow, fingerlike postsetal lobe ( Fig. 4 View FIGURE 4 C); abdominal neuropodia becoming thickened, with short ventral cirrus ( Fig. 4 View FIGURE 4 C).

Thoracic setae all long, crenulated capillaries; abdominal notopodia with crenulated capillaries and 1–2 delicate furcate setae; each furcate seta with 5–6 thin needles between tynes and rows of fine barbs on shaft ( Fig. 4 View FIGURE 4 D). Abdominal neuropodia with 2–3 capillaries and 2–3 long projecting smooth spines with entire pointed tips ( Fig. 4 View FIGURE 4 C, E–F).

Branchiae from setiger 18, short at first, becoming full size by setiger 20, each branchia thick, short with rounded apex ( Fig. 4 View FIGURE 4 C). Pygidium unknown.

Remarks. See comments under B. abyssala n. sp.

Etymology. This species is named for the collecting locality in the Weddell Sea, Antarctica .

Distribution. Weddell Sea Basin, Antarctica, 2164 m .

ZMH

Zoologisches Museum Hamburg

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Orbiniidae

Genus

Berkeleyia

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