Marphysa, Quatrefages, 1866

Wang, Binruo, Li, Jintao, Wang, Yanzhe, Liang, Chaoqi, Ji, Yinglu, Sun, Shengyao, Guo, Limei, Zhu, Hongmei & Wang, Zhi, 2025, A new species of the Marphysa sanguinea complex (Annelida: Eunicidae) from Fujian, China, Zootaxa 5689 (1), pp. 133-154 : 146

Key to Marphysa species of Group B2 (South China Sea and East Asia Sea)

1 Prostomium with sulcus................................................................................ 2

- Prostomium without sulcus.................................................... Marphysa tamurai Okuda, 1934

2 Subacicular hooks dark-colored (brown/black).............................................................. 3

- Subacicular hooks light-colored (transparent/pale yellow/yellow/pale brown)...................................... 5

3 Four types of pectinate chaetae........................................ Marphysa hongkongensa Wang et al., 2018

- Three types of pectinate chaetae.......................................................................... 4

4 IS1, IS2, AN2 pectinate chaetae present.................................... Marphysa tribranchiata Liu et al., 2017

- IS1, IS2, AN1 pectinate chaetae present.................................... Marphysa iloiloensis Glasby et al., 2019

- IS2, AN1, AN2 pectinate chaetae present.................................... Marphysa tripectinata Liu et al., 2017

- IS1, AN1, AN2 pectinate chaetae present.......................................... Marphysa fujianensis sp. nov.

5 Compound subacicular hook present...................................... Marphysa digitibranchia Hoagland, 1920

- Compound subacicular hook absent....................................................................... 6

6 Branchiae palmate.................................................... Marphysa multipectinata Liu et al., 2017

- Branchiae pectinate................................................................................... 7

7 Four types of pectinate chaetae............................ Marphysa merchangensi s Che Engku Abdullah et al., 2024

- Three types of pectinate chaetae.......................................................................... 8

8 IS1, IS2, AN1 pectinate chaetae present.................................. Marphysa maxidenticulata Liu et al., 2018

- IS2, AN1, AN2 pectinate chaetae present..................................... Marphysa orientalis Treadwell, 1936

- IS1, AN1, AN2 pectinate chaetae present.................................................................. 9

9 Postchaetal lobe rectangular in chaetiger 5–14................................ Marphysa victori Lavesque et al., 2017

- Postchaetal lobe rounded in chaetiger 5–14....................... Marphysa setiuensis Che Engku Abdullah et al., 2024