Pectinariidae, de Quatrefages, 1866

Zhang, Jinghuai, Hutchings, Pat & Qiu, Jian-Wen, 2022, Pectinariidae (Annelida, Polychaeta) from the coastal waters of China, with description of new species and new records, Zootaxa 5151 (1), pp. 1-74 : 70-71

Key to genera of Pectinariidae and species recorded from Chinese waters

1 Segments 8–21 with neurochaetae (uncini); anterior margin of cephalic veil with smooth acute triangular anterior end or several lappets............................................................................. Petta Malmgren, 1866

- Segment 21 without neurochaetae (uncini); margins of cephalic veil with cirri..................................... 2

2 One longitudinal row of major teeth on uncini........................................ Cistenides Malmgren, 1866

- More than one longitudinal row of major teeth on uncini...................................................... 3

3 Opercular rim with cirri or lappets............................................... 4 ( Amphictene Savigny, 1822 )

- Opercular rim smooth................................................................................. 7

4 Scaphal hooks 5–8 pairs.................................................... Amphictene capensis ( Pallas, 1766)

- Scaphal hooks more than 10 pairs........................................................................ 5

5 Pair of dorso-lateral lobes with undulating margin on segment 3............ Amphictene alata Zhang, Zhang & Qiu, 2015

- Pair of dorso-lateral lobes with smooth margin on segment 3................................................... 6

6 Lateral lobes of scaphe with three pairs of dorsal cirri below margins...................... Amphictene jianqingi n. sp.

- Lateral lobes of scaphe without dorsal cirri below margins......................... Amphictene japonica Nisson, 1928

7 Cephalic veil attached to lateral margin of operculum................................... 8 ( Lagis Malmgren, 1866 )

- Cephalic veil free from operculum................................................ 10 ( Pectinaria Lamarck, 1818 )

8 Lateral and posterior margins of anal flap crenulated or with cirri............................................... 9

- Lateral and posterior margins of anal flap smooth with several lappets.............. Lagis neapolitana ( Claparède, 1869)

9 Lateral and posterior margins of anal flap with numerous cirri (fringes); scaphe without club-shaped papillae near margins of lateral lobes.................................................................... Lagis bocki ( Hessle, 1917)

- Lateral and posterior margins of anal flap crenulated; scaphe with 3 pairs of club-shaped papillae near margins of lateral lobes............................................................................ Lagis koreni Malmgren, 1866

10 Segment 21 with notochaetae........................................................................... 11

- Segment 21 without notochaetae........................................................................ 14

11 Anal flap with anal cirrus.............................................................................. 12

- Anal flap without anal cirrus........................................................................... 13

12 Scaphal hooks 4–5 pairs; 60–70 cirri on the margin of cephalic veil.................. Pectinaria aegyptia ( Savigny, 1822)

- Scaphal hooks 6–8 pairs; 16–29 cirri on the margin of cephalic veil................. Pectinaria antipoda Schmarda, 1861

13 Anal flap with crenulated magin; 3–4 longitudinal rows of major teeth on uncini....... Pectinaria conchilega Grube, 1878

- Anal flap withou smooth magin; two longitudinal rows of major teeth on uncini........ Pectinaria papillosa Caullery, 1944

14 Segment 20 with neurochaetae.......................................................................... 15

- Segment 20 without neurochaetae....................................................................... 18

15 Segment 2 with a postero-dorsal lobe...................................... Pectinaria torquata Zhang & Qiu, 2017

- Segment 2 without a postero-dorsal lobe.................................................................. 16

16 Mid-ventral lobe with 4-6 continuous lappets on segment 4.................................. Pectinaria lizhei n. sp.

- Mid-ventral lobe smooth, only with pair of small papillae on corners of mid-ventral lobe on segment 4................ 17

17 Mid-ventral lobe narrow about 1/2 width of ventro-lateral lobes on segment 4................... Pectinaria xiukaii n. sp.

- Mid-ventral lobe broad almost same width of ventro-lateral lobes on segment 4............... Pectinaria dayaensis n. sp.

18 Branchiae absent on segments 3–4....................................... Pectinaria crenulatus ( Sun & Qiu, 2012)

- Branchiae present on segments 3–4.... Pectinaria plurihamus ( Choi, Jung & Yoon, 2017) or Pectinaria dimai Zachs, 1933