Prionospio (Minuspio) pulchra Imajima, 1990

Dagli, Ertan & Çinar, Melih Ertan, 2011, Species of the subgenus Minuspio (Polychaeta: Spionidae: Prionospio) from the southern coast of Turkey (Levantine Sea, eastern Mediterranean), with the description of two new species, Zootaxa 3043, pp. 35-53: 48-50

publication ID

10.5281/zenodo.206763

persistent identifier

http://treatment.plazi.org/id/03897F61-C915-FFBC-6AEF-FAE512EEF81C

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Plazi

scientific name

Prionospio (Minuspio) pulchra Imajima, 1990
status

 

Prionospio (Minuspio) pulchra Imajima, 1990 

( Figs 11View FIGURE 11, 12View FIGURE 12)

Prionospio (Minuspio) pulchra Imajima 1990: 68  –71, figs 6–7; Moreira et al. 2000: 233 –239, figs 2–4. Prionospio multibranchiata Çinar & Gönlügür  –Demirci 2005: 255; Çinar et al. 2006: 233; Çinar et al. 2008: 5 (in part) (not Berkeley 1927).

Material examined. ESFMAbout ESFM –POL/ 2005 – 263, 2 specimens, 9 September 2005, Iskenderun Bay, G 2, 36 º 43 ʹ 19 ʹ N– 36 º09ʹ 30 ʹ E, 50 m, mud; ESFMAbout ESFM –POL/ 2005 – 381, 77 specimens, 10 September 2005, Iskenderun Bay, G 5, 36 º 43 ʹ 44 ʹ N– 35 º 43 ʹ 39 ʹ E, 25 m, muddy sand; ESFMAbout ESFM –POL/ 2005 – 1519, 5 specimens, 5 December 2005, Fethiye Bay, K 50, 36 º 38 ʹ 40 ʹ N– 29 º05ʹ 30 ʹ E, 5 m, muddy sand; ESFMAbout ESFM –POL/ 2005 – 1548, 5 specimens, 6 December 2005, Fethiye Bay, K 50, 36 º 37 ʹ 48 ʹ N– 29 º06ʹ 30 ʹ E, 10 m, mud; ESFMAbout ESFM –POL/ 2005 – 1730, 2 specimens, 6 December 2005, Fethiye Bay, G 27, 36 º 37 ʹ 46 ʹ N– 29 º06ʹ 32 ʹ E, 5 m, muddy sand; ESFMAbout ESFM –POL/ 2005–2359, 2 specimens, 7 December 2005, Fethiye Bay, K 53, 36 º 44 ʹ 20 ʹ N– 28 º 55 ʹ 43 ʹ E, 3 m, Zostera marina  ; ESFMAbout ESFM –POL/ 2005–2682, 1 specimen, 2 December 2005, Beymelek Lagoon, BT 5, 36 º 15 ʹ 57 ʹ N– 30 º02ʹ 59 ʹ E, 2 m, mud. Additional material examined. Black Sea: ESFMAbout ESFM –POL/ 2000 – 107, 15 specimens, 21 April 2000, Sinop Harbour, 42 º00ʹ 53 ʹ N– 35 º 12 ʹ 36 ʹ E, 5 m, Mytilus galloprovincialis  ; ESFMAbout ESFM –POL/ 2000 – 108, 3 specimens, 21 April 2000, Sinop Harbour, 42 º01ʹ 20 ʹ N– 35 º08ʹ 49 ʹ E, 5 m, Mytilus galloprovincialis  . Aegean Sea: ESFMAbout ESFM –POL/ 2003 – 153, 45 specimens, 2 July 2003, Alsancak Harbour, 38 º 24 ʹ 54 ʹ N– 27 º02ʹ 24 ʹ E, 9 m, muddy with shell fragments; ESFMAbout ESFM –POL/ 2003 – 178, 20 specimens, 1 July 2003, Alsancak Harbour, 38 º 26 ʹ 55 ʹ N– 27 º08ʹ 11 ʹ E, 8 m, muddy with shell fragments. Pacific Ocean: NSMTAbout NSMT –POL–P– 303, Paratypes, 3 specimens, KT– 75 – 2 cruise, Tokyo Bay, 35 º19.0'N – 139 º42.0'E, 47 m, coll. M. Imajima, March 1981; NSMTAbout NSMT –POL– 90785–90789, Paratypes, 5 specimens, KT– 71 – 19 cruise, Sta. B 4 –A, 35 º35.0'N, 140 º03.6'E, 10 m, attached on buoy, coll. M. Imajima, 1 December 1971.

Description. Largest specimen complete, 0.38 mm wide, 10.9 mm long, with 73 chaetigers. Body slender, enlarged anteriorly, gradually tapering to posterior end, pale yellowish. Prostomium subrectangular, rounded anteriorly, extending posteriorly as a narrow caruncle to posterior part of chaetiger 1, with five small anterior peaks ( Fig. 11View FIGURE 11 B). Two pairs of black crescent–shaped eyes present, similar in size ( Fig. 13 AView FIGURE 13. A). Peristomium fused to chaetiger 1, forming moderate wings ( Fig. 11View FIGURE 11 B).

Ten pairs of long, cylindrical, apinnate branchiae on chaetigers 2–11; first seven pairs longest, extending over 6–8 chaetigers; pairs eight and nine shorter than preceding ones, extending over 3–5 chaetigers; last pair shortest, extending over two chaetigers ( Fig. 11View FIGURE 11 A–B).

Chaetiger 1 reduced, lacking notopodial lamellae, with small, rounded neuropodial lamellae ( Fig. 11View FIGURE 11 A); noto– and neurochaetae present. Parapodia of chaetiger 2 with erect, subtriangular notopodial postchaetal lamellae and small, rounded neuropodial lamellae. Notopodial lamellae on branchial chaetigers large, subtriangular; united across dorsum, forming low crests on chaetigers 13–21 ( Fig. 11View FIGURE 11 B). Notopodial lamellae on middle chaetigers low, broadly rounded, becoming elongate finger–like lobes on posterior chaetigers ( Fig. 12View FIGURE 12 D). Neuropodial lamellae on branchial region well developed, ear–shaped, decreasing gradually in size, becoming more rounded on following chaetigers. Neuropodial lamellae on posterior chaetigers similar to notopodial lamellae.

Capillary notochaetae on anterior and middle chaetigers moderately granulated, with thin sheath, arranged in two rows; those of anterior row shorter, with wider sheaths than those of posterior row ( Fig. 12View FIGURE 12 A). Capillary chaetae becoming thinner in posterior chaetigers. Ventral sabre chaetae usually from chaetiger 13, sometimes from chaetiger 12, one or two per fascicle; each chaeta moderately granulated, with a short, distal filament ( Fig. 12View FIGURE 12 C). Neuropodial hooded hooks first present on chaetiger 16–17; numbering up to 9–10 per fascicle; three pairs of small teeth above main fang ( Fig. 12View FIGURE 12 B). Notopodial hooded hooks first present from chaetiger 29–31, numbering up to 4–5 per fascicle. Hooks accompained by capillary chaetae throughout.

Pygidium with one long dorso–medial and two short ventro–lateral anal cirri ( Fig. 12View FIGURE 12 D).

Remarks. The Mediterranean specimens of Prionospio (Minuspio) pulchra  agree with the original description of the species from the coast of Japan ( Imajima 1990) and the subsequent description from the coast of north–west Spain ( Moreira et al. 2000). We also compared our specimens of P. (M.) pulchra  with the paratypes of the species and observed some slight differences. These differences include: (1) sabre chaetae (usually first appeared on chaetiger 13 in the Mediterranean specimens, vs. on chaetigers 11 or 12 in the Japanese specimens); (2) number of neuropodial hooded hooks per fascicle (9–10 in the Mediterranean specimens vs. 7 in the Japanese specimens).

Habitat. The maximum population density (770 individuals.m– 2) of this species was found on muddy sand substratum in 25 m depth at station G 5 (Iskenderun Bay).

Distribution. This species was previously reported from the Japanese coast ( Imajima 1990), the Atlantic coast of Spain ( Moreira et al. 2000), the Aegean Sea ( Pancucci–Papadopoulou et al. 2005; Dagli et al. in press) and the Sea of Marmara ( Çinar et al. 2011 a). This species is being newly reported from Levantine and the Black Sea coasts of Turkey.

The specimens that were previously identified as P. (M.) multibranchiata  from the Black Sea (Çinar & Gönlügür–Demirci 2005) and Aegean Sea (Alsancak Harbour) ( Çinar et al. 2006, 2008) were re–examined and it was realized that the majority of the specimens in fact belonged to P. (M.) pulchra  . The specimens that were collected from Lago di Sabaudia (Tyrrhenian Sea, Italy) and identified as Prionospio (Minuspio) cirrifera Wiren, 1883  by Giangrande and Gambi (1982) seem to be identical to P. (M.) pulchra  [see Fig. 2View FIGURE 2 of the paper by Giangrande and Gambi (1982)]. This record indicates the first occurrence of this species in the Mediterranean Sea.Previous reports of P. (M.) cirrifera  and P. (M.) multibranchiata  from the Mediterranean Sea, especially in stressed environments, should be re–examined to find out their real distributional ranges and first arrival in the Mediterranean. Prionospio (Minuspio) pulchra  is considered an invasive alien species in the Mediterranean Sea that was introduced to the region via ballast waters of ships ( Zenetos et al. 2010, Çinar et al. 2011 b).

ESFM

Museum of Faculty of Fisheries, Ege University

NSMT

National Science Museum (Natural History)

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Spionida

Family

Spionidae

Genus

Prionospio

Loc

Prionospio (Minuspio) pulchra Imajima, 1990

Dagli, Ertan & Çinar, Melih Ertan 2011

2011
Loc

Prionospio (Minuspio) pulchra

Cinar 2008: 5
Cinar 2006: 233
Moreira 2000: 233Imajima 1990: 68

2000