Prionospio (Minuspio)

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 : 51-52

Key to the species of the subgenus Prionospio (Minuspio)

1. With three or four pairs of branchiae...................................................................... 2

- With more than four pairs of branchiae..................................................................... 6

2. Branchiae present from chaetiger 3..................................... Prionospio (Minuspio) pilkena Wilson, 1990

- Branchiae present from chaetiger 2........................................................................ 3

3. With dorsal flaps on chaetigers 5–13............................................ P. (M.) laciniosa Maciolek, 1985

- Without a dorsal flap................................................................................... 4

4. Some branchia distinctly wrinkled.............................................. P. (M.) fauchaldi Maciolek, 1985

- All branchiae smooth, not wrinkled...................................................................... 5

5. With dorsal crests........................................................... P. (M.) elegantula Imajima, 1990

- Without dorsal crests............................................................ P. (M.) japonica Okuda, 1935

6. 39 pairs of branchiae....................................................... P. (M.) polybranchiata Fauvel, 1929

- Fewer than 39 pairs of branchiae......................................................................... 7

7. Interparapodial pouches present.................................................... P. (M.) aluta Maciolek, 1985

- Interparapodial pouches absent........................................................................... 8

8. Ventral sabre chaeta absent.................................................... P. (M.) perkinsi Maciolek, 1985

– Ventral sabre chaeta present............................................................................. 9

9. Some branchia distinctly longer than (minimally 4–5 times) notopodial lamellae................................... 10

- All branchiae short, nearly as long as notopodial lamellae..................................................... 15

10. Prostomium with peaks............................................................................... 11

- Prostomium without peaks............................................................................. 14

11. Anterior part of prostomium truncated, with a small medial peak.......................... P. (M.) delta Hartman, 1965

- Anterior part of prostomium rounded, with 3–5 peaks....................................................... 12

12. Eyes absent...................................................................... P. (M.) anatolica sp. nov.

- Two pairs of eyes.................................................................................... 13

13. Dorsal crests absent............................................................. P. (M.) lighti Maciolek, 1985

- Dorsal crests present........................................................... P. (M.) pulchra Imajima, 1990

14. Branchiae longest on chaetiger 2, prostomium widest at mid–point......................... P. (M.) tatura Wilson, 1990

- Branchiae longest on chaetigers 4–5, prostomium widest at posterior most region.............. P. (M.) yuriel Wilson, 1990

15. Notopodial lamellae lacking on chaetiger 1................................................................ 16

- Notopodial lamellae more or less well–developed on chaetiger 1............................................... 19

16. Dorsal crests absent......................................................... P. (M.) patagonica Augener, 1923

- Dorsal crests present................................................................................. 17

17. Without prostomial peaks......................................................... P. (M.) maciolekae sp. nov.

- With prostomial peaks................................................................................. 18

18. Anterior margin of prostomium truncated and with only a small peak..................... P. (M.) wireni Maciolek, 1985

- Anterior margin of prostomium rounded and with five small peaks............... P. (M.) multibranchiata Berkeley, 1927

19. More than 10 pairs of branchiae........................................................................ 20

- Fewer than 10 pairs of branchiae....................................................................... 21

20. Dorsal crests absent.............................................................. P. (M.) wambri Wilson, 1990

- Dorsal crests present.......................................................... P. (M.) elongata Imajima, 1990

21. Eyes absent, branchiae wrinkled................................................ P. (M.) sandersi Maciolek, 1981b

- One or two pairs eyes present, branchiae narrow and cylindrical.......................... P. (M.) cirrifera Wirén, 1883