Prionospio (Prionospio) fallax Soderstrom 1920
- Dataset
- Species of the subgenera Aquilaspio and Prionospio (Polychaeta: Spionidae: Prionospio) from the southern coast of Turkey (Levantine Sea, eastern Mediterranean), with description of a new species and two new reports for the Mediterranean fauna
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Annelida
- class
- Polychaeta
- order
- Spionida
- family
- Spionidae
- genus
- Prionospio
- species
- Prionospio fallax
diagnosis
Diagnosis. Specimen complate, 0.6 mm wide, 14.2 mm long, with 67 chaetigers. Color in alcohol opaque white. Prostomium anteriorly truncated, lateral margins slightly concave, posterior part forming a short caruncle extending to anterior margin of chaetiger 2. Two pairs of eyes; anterior pair small, spherical; posterior pair large, reniform. Four pairs of branchiae on chaetigers 2 – 5; first and fourth pairs pinnate, nearly equal in size; second and third pairs apinnate, shorter than pinnate pairs. Noto- and neuropodial postchaetal lamellae smallest on chaetiger 1; notopodial lamellae foliaceus, largest on chaetigers 3 – 4; rounded on following chaetigers. Neuropodial postchaetal lamellae largest in branchial region; subrectangular and ventrally pointed on chaetiger 2; squarish to rounded on anterior and middle chaetigers, becoming rather inconspicuous on posterior chaetigers. Dorsal crest present on dorsum of chaetiger 7 only. Interpapodial pouches absent. Ventral sabre chaeta first present on chaetiger 10, numbering 1 – 2 per fascicle. Multidentate hooded hooks first appearing on neuropodia of chaetiger 11, on notopodia of chaetigers 22 – 24.
discussion
Remarks. The Mediterranean specimens agree with the original and subsequent descriptions of the species (Söderström 1920, Sigvaldadóttir & Mackie 1993). Ecology. The highest population density (1350 individuals. m - 2) of this species was found on muddy sand substratum at 5 m depth at station G 27 (Fethiye Bay).
distribution
Distribution. Northeast Atlantic, from northern Atlantic to Mediterranean (Sigvaldadóttir & Mackie 1993); western Atlantic (Johnson 1984); Mediterranean Sea (Ergen 1979; Çinar & Ergen 1999); 2 – 440 m.
materials_examined
Material examined. ESFM – POL / 05 – 279, 7 specimens, 9 September 2005, Iskenderun Bay, G 1, 36 º 35 ΄ 37 ΄΄ N, 36 º 11 ΄ 9 ΄΄ E, 5 m, mud; ESFM – POL / 05 – 506, 20 specimens, 17 September 2005, Mersin Bay, G 7, 36 º 46 ΄ 46 ΄΄ N, 34 º 39 ΄ 39 ΄΄ E, 10 m, mud; ESFM – POL / 05 – 992, 7 specimens, 23 September 2005, Anamur, D 27, 36 º 04 ΄ 28 ΄΄ N, 32 º 53 ΄ 0 3 ΄΄ E, 10 m, muddy sand; ESFM – POL / 05 – 861, 20 specimens, 23 September 2005, Mersin Bay, D 28, 36 º 03 ΄ 37 ΄΄ N, 32 º 53 ΄ 11 ΄΄ E, 25 m, sand; ESFM – POL / 05 – 1438, 2 specimens, 26 September 2005, Antalya Bay, K 34, 36 º 50 ΄ 25 ΄΄ N, 30 º 48 ΄ 30 ΄΄ E, 5 m, sand; ESFM – POL / 05 – 1648, 1 specimen, 27 September 2005, Antalya Bay, D 39, 36 º 48 ΄ 49 ΄΄ N, 30 º 37 ΄ 57 ΄΄ E, 100 m, mud; ESFM – POL / 05 – 1749, 6 specimens, 30 September 2005, Finike, G 15, 36 º 17 ΄ 34 ΄΄ N, 30 º 09 ΄ 33 ΄΄ E, 10 m, muddy sand; ESFM – POL / 05 – 1860, 1 specimen, 30 September 2005, Finike, G 18, 36 º 16 ΄ 31 ΄΄ N, 30 º 10 ΄ 50 ΄΄ E, 75 m, mud; ESFM – POL / 05 – 1989, 5 specimens, 30 September 2005, Finike, G 16, 36 º 17 ΄ 0 7 ΄΄ N, 30 º 10 ΄ 0 2 ΄΄ E, 25 m, sandy mud; ESFM – POL / 05 – 3195, 1 specimen, 3 October 2005, Kekova, K 44, 36 º 11 ΄ 26 ΄΄ N, 29 º 50 ΄ 51 ΄΄ E, 3 m, Zostera marina; ESFM – POL / 05 – 1516, 45 specimens, 5 October 2005, Fethiye Bay, K 50, 36 º 38 ΄ 40 ΄΄ N, 29 º 05 ΄ 30 ΄΄ E, 5 m, muddy sand; ESFM – POL / 05 – 3196, 135 specimens, 6 October 2005, Fethiye Bay, G 27 36 º 37 ΄ 46 ΄΄ N, 29 º 06 ΄ 32 ΄΄ E, 5 m, muddy sand; ESFM – POL / 05 – 1547, 1 specimen, 6 October 2005, Fethiye Bay, G 28, 36 º 37 ΄ 48 ΄΄ N, 29 º 06 ΄ 30 ΄΄ E, 10 m, mud; ESFM – POL / 05 – 2361, 21 specimens, 7 October 2005, Göcek, K 53, 36 º 44 ΄ 20 ΄΄ N, 28 º 55 ΄ 43 ΄΄ 3 m, Zostera marina.