Chone murmanica Lukasch, 1910, Lukasch, 1910

Tovar-Hernández, María Ana, 2007, On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities, Zootaxa 1518, pp. 31-68: 49-50

publication ID

http://doi.org/ 10.5281/zenodo.177378

publication LSID

lsid:zoobank.org:pub:B0C3B3D8-4806-4C6D-A6B9-4670C919EDDB

DOI

http://doi.org/10.5281/zenodo.5697318

persistent identifier

http://treatment.plazi.org/id/03CE472C-FFA6-FF82-FF7A-FFA0FEB19FB8

treatment provided by

Plazi

scientific name

Chone murmanica Lukasch, 1910
status

 

Chone murmanica Lukasch, 1910  

Figure 10 View FIGURE 10

Chone murmanica Lukasch, 1910: 21   –26.

Material examined. Non-type material. Arctic Ocean [ LACM – AHF], Beaufort Sea, Northwest of Cape Halkett, Alaska, Coll. Andrew Carey: 948 –04 (3); 835 –04 (141); 836 –03 (145). [ ZIRAS 38178] Franz-Joseph Land, September 29, 1970, 28–30 m, pebble and sand (2).

Diagnosis. Body elongated, cylindrical. Body length 18 mm. Branchial crown length 4 mm. Branchial lobes short. Radiolar tips extra long. Narrow flanges. Anterior peristomial ring lobe exposed beyond collar (aprl), bilobed ( Figs 10 View FIGURE 10 B–C). Ventral collar margin higher than dorsal one, bilobed ( Figs 10 View FIGURE 10 B–C). Entire length of mid-dorsal collar margins forms a very broad gap ( Fig. 10 View FIGURE 10 A). Dorsal pockets well developed ( Fig. 10 View FIGURE 10 A). Peristomial eyes present (pe) ( Figs 10 View FIGURE 10 B–C). Paleate chaetae with long mucro ( Figs 10 View FIGURE 10 D–E); thoracic uncini with four rows of teeth ( Fig. 10 View FIGURE 10 F); thoracic narrowly hooded chaetae ( Figs 10 View FIGURE 10 K–L). Glandular ridge on chaetiger 2 narrow. Ventral thoracic shields well developed. Abdominal segments: 26. Abdominal chaetae narrowly hooded ( Figs 10 View FIGURE 10 M–N); posterior abdominal uncini modified with six rows of teeth ( Figs. 10 View FIGURE 10 H–J). Pygidium with triangular posterior margin.

Methyl green staining. Dorsally there is no colour, only lateral spots in the collar, laterally, the following segments have glandular spots ( Fig. 10 View FIGURE 10 A). Ventrally: collar segment stained uniformly, except the anterior margin, and the area where the otoliths occurs ( Figs 10 View FIGURE 10 B–C).

Gametes. Spermatozoa with barrel-shaped nucleus, triangular, short acrosome, two small, rounded mitochondria ( Fig. 10 View FIGURE 10 G).

Remarks. Cochrane (2000) stated that the illustration of the anterior end of C. murmanica   , depicted in Lukasch (1910) indeed closely resembles the drawing of C. paucibranchiata   by Kr ø yer. Both taxa have three pairs of radioles and a characteristically pronounced dorsal gap in the collar. Chone paucibranchiata   has been regarded as a junior synonym of Chone infundibuliformis Kr ø   yer, 1856 after Malmgren (1866), but Banse (1972) stated that C. paucibranchiata   has well developed ventral glandular shields (absent in C. infundibuliformis   ); and that its palmate membrane extends at least one-third of the branchial crown length (two thirds in C. infundibuliformis   ). If C. paucibranchiata   is regarded as a valid species, it would have priority over C. murmanica   , but examination of topotype material is necessary in order to confirm the synonym. Among species of Chone   included in this revision, C. murmanica   is unique by having a ventral shield of collar in trapezoidshaped ( Table 2 View TABLE 2 ).

LACM

Natural History Museum of Los Angeles County

AHF

Allan Hancock Foundation, University of Southern California

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Sabellida

Family

Sabellidae

Genus

Chone

Loc

Chone murmanica Lukasch, 1910

Tovar-Hernández, María Ana 2007
2007
Loc

Chone murmanica

Lukasch 1910: 21
1910