Ampharetidae

Reuscher, Michael, Fiege, Dieter & Wehe, Thomas, 2009, Four new species of Ampharetidae (Annelida: Polychaeta) from Pacific hot vents and cold seeps, with a key and synoptic table of characters for all genera, Zootaxa 2191, pp. 1-40 : 6-9

Key to genera of Ampharetidae

1. 3–4 anterior segments with fine acicular neurochaetae. Chaetae on segment II (paleae) absent. Post-branchial hooks may be present ......................................................................................................................................... Melinninae ...2

- Acicular neurochaetae absent. Notochaetae on segment II (paleae) may be present. Post-branchial hooks absent ...... Ampharetinae ................................................................................................................................................................ 7

2. Post-branchial hooks present ........................................................................................................................................ 3

- Post-branchial hooks absent.......................................................................................................................................... 5

3. 2 pairs of post-branchial hooks....................................................................................................................... Moyanus

- 1 pair of post-branchial hooks ...................................................................................................................................... 4

4. 4 pairs of smooth branchiae. 14 thoracic uncinigers ........................................................................................ Melinna

- 2–4 pairs of branchiae, 2 pairs papillose. 12–13 thoracic uncinigers .................................................................. Isolda

5. 3 pairs of branchiae................................................................................................................................. Melinnopsides

- 4 pairs of branchiae...................................................................................................................................................... 6

6. 16 thoracic uncinigers............................................................................................................................ Melinantipoda

- 10–14 thoracic uncinigers.......................................................................................................................... Melinnopsis

7. Uncini absent. Nuchal organ with distinct papillae .................................................................................. Andamanella

- Uncini present. Nuchal organ without distinct papillae................................................................................................ 8

8. 4 pairs of branchiae....................................................................................................................................................... 9

- Less than 4 pairs of branchiae..................................................................................................................................... 45

9. First abdominal segment with fan–shaped structures connected by dorsal membrane .......................... Jugamphicteis

- First abdominal segment without fan–shaped structures............................................................................................ 10

10. Posterior thorax with modified segment: elevated notopodia, may be connected by dorsal glandular ridge, with mod- ified capillary chaetae or prolonged segments............................................................................................................ 11

- Posterior thorax without modified segment ............................................................................................................... 14

11. 4th, 5th or 6th last notopodia elevated or with modified capillary chaetae; alternatively, last few thoracic chaetigers prolonged ......................................................................................................................................... Anobothrus (part)

- 3rd last notopodia elevated .......................................................................................................................................... 12

12. 13 thoracic uncinigers.................................................................................................................................... Sosanella

- 12 thoracic uncinigers................................................................................................................................................. 13

13. 15 thoracic chaetigers .................................................................................................................................. Sosanopsis

- 16 thoracic chaetigers ......................................................................................................................................... Sosane

14. Prostomial glandular ridges or nuchal organs referred to as glandular ridges present ............................................... 15

- Prostomial glandular ridges or nuchal organs referred to as glandular ridges absent ............................................... 21

15. Chaetae on segment II (paleae) present ...................................................................................................................... 16

- Chaetae on segment II (paleae) absent ...................................................................................................................... 18

16. 13 thoracic uncinigers...................................................................................................................................... Hypania

- 14 thoracic uncinigers................................................................................................................................................. 17

17. Abdominal segments with none or few rudimentary notopodia. Anal cirri absent ...................................... Hobsonia

- Abdominal segments with rudimentary notopodia. Anal cirri present ....................................................... Amphicteis

18. Buccal tentacles papillose ....................................................................................................................... Paramphicteis

- Buccal tentacles smooth ............................................................................................................................................. 19

19. Abdominal rudimentary notopodia absent; club-shaped notopodial cirri absent ...................................... Grubianella

- Abdominal rudimentary notopodia present; club-shaped notopodial cirri present..................................................... 20

20. 2–3 anteriormost thoracic notopodia rudimentary. Pre-branchial segments not fused ventrally ................. Mexamage

- Anteriormost thoracic notopodia not rudimentary. Pre-branchial segments fused ventrally ................... Amage (part)

21. 17 thoracic uncinigers...................................................................................................................................... Amathys

- 10–14 thoracic uncinigers.......................................................................................................................................... 22

22. 10 thoracic uncinigers................................................................................................................................................. 23

- 11–14 thoracic uncinigers ........................................................................................................................................... 24

23. 13 thoracic chaetigers ............................................................................................................................. Decemunciger

- 15 thoracic chaetigers .................................................................................................................................... Grassleia

24. 11 thoracic uncinigers ................................................................................................................................................. 25

- 12–14 thoracic uncinigers........................................................................................................................................... 30

25. Abdominal rudimentary notopodia present ................................................................................................................ 26

- Abdominal rudimentary notopodia absent.................................................................................................................. 28

26. 1–2 anteriormost thoracic notopodia rudimentary........................................................................................ Paramage

- Anteriormost thoracic notopodia not rudimentary ..................................................................................................... 27

27. Branchiae foliose. 14 thoracic chaetigers ............................................................................................. Phyllampharete

- Branchiae cirriform. 15 thoracic chaetigers................................................................................................. Amagopsis

28. 15 thoracic chaetigers ................................................................................................................................ Endecamera

- 13–14 thoracic chaetigers ........................................................................................................................................... 29

29. Branchiae papillose ............................................................................................................................... Pterampharete

- Branchiae smooth ......................................................................................................................................... Sabellides

30. 12 thoracic uncinigers ................................................................................................................................................ 31

- 13–14 thoracic uncinigers .......................................................................................................................................... 38

31. Buccal tentacles absent. Jaw structures present. Chaetae on segment II (paleae) present ................. Gnathampharete

- Buccal tentacles present. Jaw structures absent. Chaetae on segment II (paleae) present or absent ......................... 32

32. 16 thoracic chaetigers ................................................................................................................................................ 33

- 14 or 15 thoracic chaetigers ........................................................................................................................................ 35

33. Branchiae arranged segmentally, of different sizes ........................................................................................ Noanelia

- Branchiae arranged 2+2 or in transverse row. Branchiae of uniform size.................................................................. 34

34. Branchiae arranged 2+2. Lower lip crenulated................................................................................... Pseudampharete

- Branchiae arranged in transverse row. Lower lip not crenulated ................................................................... Pavelius

35. 14 thoracic chaetigers .................................................................................................................................. Asabellides

- 15 thoracic chaetigers ................................................................................................................................................. 36

36. Chaetae on segment II (paleae) present. Up to 26 abdominal segments ...................................................... Ampharete

- Chaetae on segment II (paleae) absent. More than 30 abdominal segments .............................................................. 37

37. 3 of 4 pairs of branchiae lamellate........................................................................................................... Schistocomus

- Each pair of branchiae smooth.................................................................................................................. Phyllocomus

38. 13 thoracic uncinigers ................................................................................................................................................ 39

- 14 thoracic uncinigers ............................................................................................................................................... 40

39. 1 pair of branchiae papillose ................................................................................................................... Pterolysippe

- Each pair of branchiae smooth........................................................................................................................... Lysippe

40. 17 thoracic chaetigers ............................................................................................................................ Amphisamytha

- 18 thoracic chaetigers ............................................................................................................................................... 41

41. 2 of 4 pairs of branchiae lamellate....................................................................................................... Phyllamphicteis

- Each pair of branchiae cirriform ................................................................................................................................. 42

42. Notopodial cirri present .................................................................................................................................... Paiwa

- Notopodial cirri absent............................................................................................................................................... 43

43. 3 pairs of branchiae in transverse row, 4th pair behind outermost pair of transverse row............................. Lysippides

- Branchial arrangement otherwise ............................................................................................................................. 44

44. Branchiae arranged 2+2, separated by median membrane. Chaetae on segment II (paleae) small. Anal cirri present.. .................................................................................................................................................................... Paralysippe

- Branchiae arranged 2+1+1. Chaetae on segment II (paleae) large. Anal cirri absent .................................. Hypaniola

45. 3 pairs of branchiae .................................................................................................................................................... 46

- Less than 3 pairs of branchiae.................................................................................................................................... 67

46. Last thoracic segment with elevated notopodia and modified notochaetae................................................................ 47

- Last thoracic segment without modification ............................................................................................................ 48

47. 9 thoracic uncinigers........................................................................................................................................... Mugga

- 10 thoracic uncinigers.................................................................................................................................. Muggoides

48. First abdominal segment with fan-shaped structures connected by dorsal membrane.................................... Ymerana

- First abdominal segment without fan-shaped structures............................................................................................. 49

49. 5th last thoracic unciniger with elevated notopodia connected by dorsal glandular ridge ............ Anobothrus laubieri

- 5th last thoracic unciniger without elevated notopodia................................................................................................ 50

50. Anterior thoracic segment with dorsal dermal ridge .................................................................................................. 51

- Anterior thoracic segment without dorsal dermal ridge ............................................................................................ 52

51. Branchiae originate from dermal ridge...................................................................................................... Neosamytha

- Branchiae and dermal ridge separated ............................................................................................... Melinnampharete

52. Prostomial glandular ridges or nuchal organ referred to as glandular ridges present................................................. 53

- Prostomial glandular ridges or nuchal organ referred to as glandular ridges absent .................................................. 54

53. 11 thoracic uncinigers ............................................................................................................................ Amage gallasi

- 14 thoracic uncinigers ............................................................................................................................. Samythopsis

54. 10 thoracic uncinigers................................................................................................................................... Adercodon

- More than 10 thoracic uncinigers .............................................................................................................................. 55

55. 11 thoracic uncinigers .............................................................................................................................................. 56

- More than 11 thoracic uncinigers ............................................................................................................................... 58

56. Branchiae segmentally arranged................................................................................................................. Ampharana

- Branchiae not segmentally arranged ......................................................................................................................... 57

57. 14 thoracic chaetigers ........................................................................................................................ Glyphanostomum

- 15 thoracic chaetigers ................................................................................................................................ Amythasides

58. 12 thoracic uncinigers................................................................................................................................................. 59

- More than 12 thoracic uncinigers ............................................................................................................................. 63

59. Chaetae on segment II (paleae) present ...................................................................................................................... 60

- Chaetae on segment II (paleae) absent .................................................................................................................... 61

60. Last 5 thoracic segments at least 3 times longer than anterior ones ........................................................... Eclysippe

- Last 5 thoracic segments not conspicuously prolonged.......................................................................... Parampharete

61. Tentacles borne on probosciform organ............................................................................................................... Pabits

- No probosciform organ present ................................................................................................................................ 62

62. Tentacles papillose ................................................................................................................................ Neosabellides

- Tentacles smooth.......................................................................................................................................... Samythella

63. 13 thoracic uncinigers..................................................................................................................................... Alkmaria

- 14 or 15 thoracic uncinigers ....................................................................................................................................... 64

64. 15 thoracic uncinigers.................................................................................................................................... Weddellia

- 14 thoracic uncinigers................................................................................................................................................ 65

65. Branchiae segmentally arranged.................................................................................................................... Neopaiwa

- Branchiae not segmentally arranged.......................................................................................................................... 66

66. Abdominal rudimentary notopodia present ..................................................................................................... Samytha

- Abdominal rudimentary notopodia absent....................................................................................................... Amythas

67. Branchiae absent. 11 thoracic uncinigers............................................................................................................ Emaga

- 2 pairs of branchiae. 9, 10, 12 or 14 thoracic uncinigers........................................................................................... 68

68. 14 thoracic uncinigers. Chaetae on segment II (paleae) present................................................................................. 69

- Less than 14 thoracic uncinigers. Chaetae on segment II (paleae) absent................................................................. 70

69. Prostomial glandular ridges present.................................................................................................... Pseudamphicteis

- Prostomial glandular ridges absent ........................................................................................................ Ecamphicteis

70. 12 thoracic uncinigers. First row of uncini about 2 times longer than remaining ones............................................. 71

- Less than 12 thoracic uncinigers. First row of uncini not prolonged ........................................................................ 72

71. Prostomium anteriorly pointed ................................................................................................................ Auchenoplax

- Prostomium anteriorly truncate ................................................................................................................. Melinnoides

72. 10 thoracic uncinigers. 2nd last pair of notopodia elevated, connected by dorsal glandular ridge................ Zatsepinia

- 9 thoracic uncinigers. No elevated notopodia................................................................................................. Egamella