Pectinaria dodeka, Hutchings & Peart, 2002

Hutchings, P. & Peart, R., 2002, A Review of the Genera of Pectinariidae (Polychaeta) Together with a Description of the Australian Fauna, Records of the Australian Museum 54, pp. 99-127: 118-121

publication ID

2201-4349

persistent identifier

http://treatment.plazi.org/id/CD13A765-FFD9-CF3C-6369-E119FD6DFC3E

treatment provided by

Felipe

scientific name

Pectinaria dodeka
status

n.sp.

Pectinaria dodeka   n.sp.

Figs. 11A–B, 12C–D, 13, 14A–B, 15A–C, Tables 4, 6

Pectinaria brevispinis   .– Nilsson, 1928: 64–68.– Monro, 1931: 27– 28.– Caullery, 1944: 71. Not Grube, 1878.

Pectinaria antipoda   .– Stephenson et al., 1974: 114 (in part). Not Schmarda, 1861.

Type material. HOLOTYPE: 1, AM W 25615 View Materials *, 27.iii. 1962, 17 mm long, 4 & 2 mm wide   . PARATYPE: 1, AM W 19076 View Materials *, 21 mm long, 4 & 2 mm wide   .

Type locality. Queensland: Moreton Bay, Dunwich , 27°30'S 153°24'E, collected 27.iii.1962, no information on habitat available GoogleMaps   .

Additional material examined. NORTHERN TERRITORY: Darwin Harbour , 12°27'S 130°48'E, 6.vii. GoogleMaps   1993, 17 m, 1, NTM W 10399 View Materials *; Gulf of Carpentaria, Bing Bong, McArthur River , 15°37'S 136°15'E, 2, NTM W7720 *; 1, NTM W 16862 View Materials *; 1, NTM W 16864 View Materials GoogleMaps   *. QUEENSLAND: Torres Strait, Murray I., 09°33'S 144°03'E, 1, AM W2648 *; Low Isles, Great Barrier Reef, 16°23'S 145°34'E, ii.1929 GoogleMaps   , 1, BMNH 1931.7.1.60, ii.1929   , 1, BMNH 1931.7.1.61, February 1929   ; 1, AM W2615 *; off South Mission Beach, Dunk I., 17°57'S 146°09'E, ii.1910 GoogleMaps   , 1, AM W100 *; Whitsunday Group, 20°03'S 148°53'E, i.1933 GoogleMaps   , 1, AM W3028; Lindeman I., 20°27'S 149°02'E, 1935, 1, AM W 25446 View Materials *, in sand*, i. GoogleMaps   1928, 16 m, 1, AM W2649 *; Hayman I., Whitsunday Pass, 20°03'S 148°53'E, i.1934 GoogleMaps   , 1, AM W3117 *; Langford Reef, Black I., 20°05'S 148°54'E, xi.1969 GoogleMaps   , 1, AM W4292; Calliope River, N of Gladstone, 24°01'S 150°59'E, 1974, 4, AM W199312 *; Moreton Bay , Dunwich, 27°25'S 153°20'E, 1967, 1 GoogleMaps   , QM G5042 *; Stradbroke I., Dunwich, 27°30'S 153°24'E, 4.x.1952 GoogleMaps   , 1, QM G4080 *; 2.4 km S of South West Rocks, Peel I., 27°30'S 153°21'E, vi.1970 GoogleMaps   , 3.4 m, sand, mud, shell, 1, QM G 10340 View Materials *; Brisbane River mouth, 27°22'S 153°11'E, 22.vii.1975 GoogleMaps   , sand and mud, 3, QM GH2880 *; Middle Banks , 27°13'S 153°19'E, viii 1982 GoogleMaps   , 4, QM G212177 *; 1.6 km SE of Redcliffe Jetty , 27°15'S 153°08'E, 15.xii.1964 GoogleMaps   , 4.2 m, shell, grit, 1, QM G5040 *; Bramble Bay , 27°18'S 153°06'E, 29.vi.1972 GoogleMaps   , 4, QM G 10515 View Materials ; viii.1972   , 2, QM G 10635 View Materials   *; NEW SOUTH WALES: Lake Macquarie , 36°54'S 149°53'E, vi.1977 GoogleMaps   , Zostera   beds, 2, AM W 17847 View Materials *; Sydney, Port Jackson , 33°50'S 151°16'E, xi.1925 GoogleMaps   , 1, AM W1760 *; between Sow & Pigs Shoal and Shark I., 30°52'S 153°00'E, iv.1928 GoogleMaps   , 4– 5 m, 1, AM W2578 *; 1 km SE of Little Bay, Malabar , 33°59'09"S 151°15'40.2"E, 12.v. GoogleMaps   1972, 25 m, 1, AM W6460 *; SE of Malabar , 33°58'7.8"S 151°16'52.2"E, 2.i.1973 GoogleMaps   , 49– 53 m, 1, AM W6461 *; Jervis Bay , 35°03'S 150°44'E, 23.iv. GoogleMaps   1973, 15 m, sand, 1, AM W5617 *; Merimbula Channel, 36°55'S 149°55'E, 4.xii.1975 GoogleMaps   , Posidonia   , on south side of seaward end of central sand bank, 1, AM W 17111 View Materials *; Lake Merimbula , 36°03'S 151°36'30"E, 25.xi. GoogleMaps   1977, 6 m, mud, 1, AM W 19254 View Materials *; 900 m SW of Narooma Bridge, Wagonga , 36°13'42"S 150°07'30"E, weed beds, 1, AM W 10498 View Materials GoogleMaps   *. VICTORIA: central Bass Strait, 35 km NNE of Cape Wickham , 39°16'00"S 144°05'24"E, 23.xi. GoogleMaps   1981, 82 m, sandy shell, 2, MV F 78890 View Materials *. Material examined varied from 8 to 80 mm long & 2 to18 & 1 to 8 mm wide   .

Description. Preserved specimen small, conical-shaped, grey to pale cream in colour, and some black pigmentation present anteriorly. Tube curved, composed of cemented shell-like fragments.

Rim of cephalic veil with 16 long cirri tapering to blunt tip. Cephalic veil completely free from operculum forming dorsal semi-circle around numerous peristomial palps.

Raised opercular margin well developed and smooth. Operculum with 12 pairs of paleae, long, golden brown, subacute, curved dorsally, with compact tips. First pair of tentacular cirri arising from anterior edge of segment 2. Ventral ridge connecting second pair of tentacular cirri on segment 3 incised, forming glandular lobes. Chaetiger 2 with anteroventral lobe large and broad; anterior margin of lobe crenulate, posterodorsal lobe absent ( Fig. 14A).

Two pairs of comb-like stalked branchiae, consisting of loose, flat lamellae. Anterior pair situated more ventrally than posterior pair and larger than posterior pair. Branchiae lie flattened against body on preserved animals.

Chaetigers 1 to 3 (segments 5 to 7) with notopodia and notochaetae only. Chaetigers 4 to 16 with notopodia, neuropodia, notochaetae and neurochaetae. Chaetiger 17 with notopodia and notochaetae only. Notochaetae capillaries with one margin strongly pectinated ( Figs. 11A– B, 15A). Notopodia and notochaetae of chaetigers 1 to 3 and 15 to 18 are slightly reduced in size in comparison to those of chaetigers 4 to 14. Neuropodia wedge shaped, erect with margins becoming rounded posteriorly, glandular. Neurochaetae with major teeth arranged in two rows, 6–10 teeth per row ( Figs. 12C, 15B–C).

Posterior scaphe and abdomen distinctly separated. Posterior 5 segments fused to form a flattened plate or scaphe broader than long, with crenulated margins. Scaphe with an anal flap and dorsal papilla. Eight pairs of scaphal hooks, broad, blunt, brown ( Fig. 12D). Prominent glandular areas present on chaetigers 4 to 17, and ventral areas of segments 1 to 6 also glandular. Triangular gland present between segments 2 and 3, situated mid-ventrally. Segments 3 and 4 with raised glandular anterior margins extending across venter. Paired nephridial papillae on chaetiger 1, inserted ventrally at the base of the second pair of branchiae.

Variation. The number of cirri on the cephalic veil margin varies from 16 to 28, the number of pairs of paleae varies from 11–13, and the number of scaphal hooks varies from 6 to 10 pairs, and this appears to be related to size with larger animals having more cirri, paleae and hooks than smaller individuals. The anterior pair of branchiae in some specimens are of similar size to the posterior pair. The intensity of the glandular areas varies.

Remarks. Pectinaria dodeka   n.sp. can be distinguished from all other described species of Pectinaria   by the following combination of characters: 16–18 pairs of cirri on the cephalic veil, 11 to 13 pairs of subacute dorsally curved paleae and 6–10 pairs of scaphal hooks (see Table 4). The species most closely resembles another Australian species, P. kanabinos   , in terms of the number of cephalic cirri present, but can be distinguished from it by the shape of the paleae: subacute curved dorsally in P. dodeka   and acute needle shaped in P. kanabinos   . In addition, the shape of the scaphe and the number of pairs of scaphal hooks differs between the two species. The species may be separated from P. antipoda   by the lack of rounded papillae on the anterior margin of the anteroventral lobe of chaetiger 2. Many other species have a similar number of paleae, although as is clear from Table 4, some species exhibit a considerable range in the number of pairs present; this may be a function of size of individuals or perhaps an indication that the paleae can be replaced if damaged during feeding. The absolute number of pairs of paleae may not be a useful character.

Material identified as P. brevispinis   by Monro (1931) (BMNH 1931.7.1.61; 1931.7.60.) from Low Isles, Queensland has been re-examined and we have referred them to P. dodeka   n.sp. as well as material he identified as P. antipoda   . Pectinaria dodeka   n.sp. can be distinguished from P. brevispinis   by the number of cirri on the cephalic veil, 16–28 in P. dodeka   and 25–30 on P. brevispinis   , and the number and shape of scaphal hooks present.

Material identified as P. antipoda   by Stephenson et al. (1974) from Moreton Bay was re-examined and consisted of both P. antipoda   and P. dodeka   n.sp.

Etymology. The specific name dodeka   is from the Greek word for twelve and refers to the number of pairs of paleae present on the holotype.

Distribution. Gulf of Carpentaria, and the east Australian coast ( Fig. 13), often associated with estuarine or sheltered waters.

Habitat. Collected from shallow waters to depths of 82 m, in soft sediments, sometimes associated with seagrass beds. Habitat data are lacking for many specimens.

AM

Australian Museum

W

Naturhistorisches Museum Wien

NTM

Northern Territory Museum of Arts and Sciences

I

"Alexandru Ioan Cuza" University

N

Nanjing University

G

Conservatoire et Jardin botaniques de la Ville de Genève

MV

University of Montana Museum

F

Field Museum of Natural History, Botany Department

Kingdom

Chromista

Phylum

Foraminifera

Class

Polychaeta

Order

Terebellida

Family

Pectinariidae

Genus

Pectinaria

Loc

Pectinaria dodeka

Hutchings, P. & Peart, R. 2002
2002
Loc

Pectinaria antipoda

Stephenson, W 1974: 114
1974
Loc

Pectinaria brevispinis

Caullery, M 1944: 71
Monro, C 1931: 27
Nilsson, D 1928: 64
1928