Pectinaria dodeka Hutchings & Peart, 2002

Zhang, Jinghuai & Hutchings, Pat, 2019, A revision of Australian Pectinariidae (Polychaeta), with new species and new records, Zootaxa 4611 (1), pp. 1-70: 50-54

publication ID

https://doi.org/10.11646/zootaxa.4611.1.1

publication LSID

lsid:zoobank.org:pub:178FED38-5FEA-417F-B5DC-807D943B641C

persistent identifier

http://treatment.plazi.org/id/586F0669-FFB8-FFB9-FF7B-FBB3BB8028D7

treatment provided by

Plazi

scientific name

Pectinaria dodeka Hutchings & Peart, 2002
status

 

Pectinaria dodeka Hutchings & Peart, 2002  

Figs 26–27 View FIGURE 26 View FIGURE 27 , Table 3

Pectinaria dodeka Hutchings & Peart, 2002: 99 – 127   , figs 11 – 12 & 14 – 15.

Material examined. Australia: Queensland: AM W.25615 (Holotype) Dunwich, Moreton Bay , 27°30’S 153°24’E, coll. F.C. Vohra, 27 Mar 1962 GoogleMaps   ; AM W.19076 (Paratype), 1 spec., Dunwich, Moreton Bay   , Queensland, 27°30’S 153°24’E, coll. F.C. Vohra, 27 Mar 1962 GoogleMaps   .

Additional material examined. Australia: Queensland: AM W.30912, 1 spec., Cairns, Careening area , 16°52’S 145°49’E, 10 m, coll. CRC Reef Research Centre Ltd, 17 Nov 2001 GoogleMaps   ; AM W.199312, 3 specs, Calliope River, Gladstone , 23°51’S 151°10’E, coll. P. Saenger, 1974 GoogleMaps   ; AM W.19104, 2, specs, mouth of Brisbane River , 27°22’S 153°09’E, 2 m, coll. T. Hailstone, 1963 GoogleMaps   . New South Wales: AM W.17847, 2 specs, Lake Macquarie , 33°03’S 151°38’E, Zostera   beds, coll. K. Robinson, Jul 1977 GoogleMaps   ; AM W.7724, 1 spec., Lake Macquarie, Black Neds Bay , 33°05’44”S 151°38’48”E, coll. L. Collett, Sep 1972 GoogleMaps   ; AM W.33195, 1 spec. (mounted for SEM), Cottage Point , near the shop, 33°37’S 151°12’E, 0 m, coll. P.A. Hutchings, 10 Feb 2002 GoogleMaps   ; AM W.35293, 1 spec., Cowan Creek , 33°37’S 151°12’30”E, 0 m, sand mud, coll. P.A. Hutchings, 03 Nov 1996 GoogleMaps   ; AM W.35831, 2 specs, Cowan Creek , 33°37’S 151°12’30”E, 0 m, coll. P.A. Hutchings, 03 Nov 1996 GoogleMaps   ; AM W.37739, 2 specs, Cowan Creek, Cottage Point , 33°37’08”S 151°12’21”E, 0 m, coll. P.A. Hutchings & J.Z. Silva, 15 Apr 2011 GoogleMaps   ; AM W.24053, 2 specs, Cowan Creek, Cottage Point , 33°39’S 151°10’E, coll. P.A. Hutchings, Aug 1997 GoogleMaps   .

Description. Based on all specimens examined. Preserved specimen pale or reddish in colour, conical in shape ( Fig. 26A – B View FIGURE 26 ). Body length 8.1 – 22.2 mm (holotype 18.5 mm) including paleae and scaphe, width 2.0 – 4.5 mm (holotype 3.2 mm) at cephalic regions.

Cephalic veil oval, free from operculum, with 14 – 21 (holotype 16) smooth cirri on anterior margin and about 1/2 of lateral margins ( Figs 26A, G View FIGURE 26 ; 27A View FIGURE 27 ). Pair of ear-shaped lobes adjacent to both sides of dorsal base of cephalic veil. Buccal tentacles with longitudinal grooves, arising posterior to cephalic veil ( Figs 26A – B, F – G View FIGURE 26 ; 27A – B View FIGURE 27 ).

Operculum semicircular; dorsal and lateral margin well developed, smooth; ventral margin (opercular ridge) with 9 – 14 (holotype 12) pairs of golden paleae, curved dorsally, acute with extended tips ( Figs 26A – B, F – G View FIGURE 26 ; 27A – B View FIGURE 27 ).

First pair of tentacular cirri extending beyond tips of paleae, with annuli, arising from connection of opercular margin and paleal ridge ( Figs 26F – G View FIGURE 26 ; 27A – B View FIGURE 27 ). Pair of small ventral lappets present behind tentacular cirri near cephalic veil on segment 1 ( Figs 26F – G View FIGURE 26 ; 27A – B View FIGURE 27 ). Ventral region of segment 1 covered by buccal tentacles and ventral lobes of segment 2 ( Figs 26G View FIGURE 26 ; 27A View FIGURE 27 ).

Second pair of tentacular cirri extending beyond opercular margin, with annuli, on latero-median connecting ridge on segment 2, inserted more dorsally than 1 st pair of tentacular cirri ( Figs 26B, F View FIGURE 26 ; 27B View FIGURE 27 ). Segment 2 with smooth ventral lobes as pair of narrow ventro-lateral lobes separated by grooves from base of 2 nd pair of tentacular cirri, and pair of broad mid-ventral lobes about 4x as wide as ventro-lateral lobes ( Figs 26F – G View FIGURE 26 ; 27A – B View FIGURE 27 ). Segment 2 without dorsal lobe ( Figs 26G View FIGURE 26 ; 27B View FIGURE 27 ).

Comb-like branchiae on segments 3 – 4, consisting of series of dense, flat lamellae ( Figs 26B, F View FIGURE 26 ; 27A – B View FIGURE 27 ). Branchiae on segment 3 larger and inserted more ventrally than those on segment 4. Pair of small dorso-lateral glandular pads present adjacent to branchiae on segments 3 and 4 ( Figs 26B, F View FIGURE 26 ; 27B View FIGURE 27 ).

Distinct ventral glandular lobes present on segments 3 – 6, becoming progressively more lateral and broader on segments 3 – 5 ( Figs 26G View FIGURE 26 ; 27A – B View FIGURE 27 ). Hump present near branchiae on segment 4. Segment 3 with broad ventral lobe, higher at mid-line. Segment 4 with pair of broad ventro-lateral lobes and mid-ventral lobe about 1/2 width of ventro-lateral lobes, separated from those by shallow grooves. Segment 5 with pair of ventro-lateral lobes and midventral lobe about 1/3 width of ventro-lateral lobes, separated from those by shallow grooves. Segment 6 with pair of broad ventral lobes with continuous papillae, separated from each other by deep notch ( Figs 26A, G View FIGURE 26 ; 27A – B View FIGURE 27 ).

Notopodia other than those of segment 1 which bear paleae, on segments 5 – 21 (17 pairs), each bearing two kinds of notochaetae; one short and winged from anterior row, bordered with serrations along distal portion, covered progressively with more spines from about middle to front of wing, on anterior surface; other long, stout and straight from posterior row, tapering to an acute tip, covered progressively with more spines from mid-anterior portion to end, on anterior surface ( Figs 26A – B View FIGURE 26 ; 27C View FIGURE 27 ). Neuropodia, 13 pairs on segments 8 – 20, each with slightly raised torus with transverse row of uncini; each uncinus with a U-shaped anterior peg embedded into torus, several rows of minor teeth, and 2 – 3 longitudinal rows of major teeth, each with 7 – 8 teeth ( Figs 26A – B View FIGURE 26 ; 27D – E View FIGURE 27 ). Segment 21 with pair of ventro-lateral lobes near notopodia.

Scaphe ovoidal, flattened dorsally, divided into four anterior narrow lobes and two posterior rounded lobes on each lateral margin ( Figs 26D – E View FIGURE 26 ; 27E View FIGURE 27 ). Anal flap triangular tongue with extended fine tip, smooth margin, with short anal cirrus ( Fig. 26D – E View FIGURE 26 ). Scaphal hooks 3 – 6 (holotype 4) pairs, amber, distinctly bent towards pointed tips ( Figs 26D View FIGURE 26 ; 27F View FIGURE 27 ).

Tube with wide opening, slightly curved, fragile wall made of yellow proteinaceous glue and large sand grains ( Fig. 26C View FIGURE 26 ).

Methyl Green stained body distinctly green on cirri of cephalic veil, ventral lobes of segments 2–6, base of 2 nd pair of tentacular cirri, dorso-lateral pads of segments 3–4, regions adjacent to neuropodia on segments 20–21, margins of scaphe, ventro-lateral regions on posterior end of scaphe, and dorsum of anal flap except for anal cirri and margin ( Fig. 26E, F View FIGURE 26 ).

Distribution. SE Queensland and New South Wales ( Fig. 1 View FIGURE 1 ).

Habitat. Found in mud or mud sand from intertidal to shallow waters and in estuarine conditions.

Remarks. We have expanded the original description of Pectinaria dodeka Hutchings & Peart, 2002   , and provided additional images of the holotype and some morphological which were not included in the original descripton; these include a pair of lateral ear-shaped lobes adjacent to both sides of dorsal base of cephalic veil, pair of small ventral lappets on segment 1, pair of small dorso-lateral glandular pads on segments 3 and 4, ventral lobes on segments 3–6, U-shaped anterior peg and 2 – 3 longitudinal rows of major teeth on uncini, and an expanded description of the scaphal lateral lobes. Pectinaria dodeka   has more scaphal hooks in larger individuals; the number of cirri of cephalic veil and paleae does not significantly increase with body size ( Fig. 28 View FIGURE 28 ). Pectinaria dodeka   can be distinguished from other Australian Pectinaria   species by the following characters: paleae with extended pointed tips, 3 – 6 pairs of scaphal hooks with distinctly curved end, 2 – 3 longitudinal rows of major teeth on uncini, ventral lobes with continuous papillae on segment 6 and the dorso-lateral lobes absent on segment 2 ( Table 3). Pectinaria dodeka   is very similar to P. kanabinos   and P. antipoda   for they all have continuous papillae on the ventral lobes of segment 6. But Pectinaria dodeka   may be distinguished from P. kanabinos   which has cirri on lateral and posterior margins of the anal flap and 3 – 4 longitudinal rows of major teeth on uncini, whereas P. dodeka   has smooth lateral and posterior margin of the anal flap and 2 – 3 longitudinal rows of major teeth on uncini. Pectinaria dodeka   differs from P. antipoda   which has blunt paleae, dorso-lateral lobes on segment 2, relatively more (usually 6 – 8 pairs) scaphal hooks, and two longitudinal rows of major uncinial teeth.

AM

Australian Museum

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Terebellida

Family

Pectinariidae

Genus

Pectinaria

Loc

Pectinaria dodeka Hutchings & Peart, 2002

Zhang, Jinghuai & Hutchings, Pat 2019
2019
Loc

Pectinaria dodeka

Hutchings & Peart 2002: 99
2002