Lynceus, Muller, 1776

Shu, Shusen, Sigvardt, Zandra M. S., Chen, Xiaoyong, Olesen, Jørgen, Rogers, D. Christopher & Sanoamuang, La-orsri, 2019, Ophiacantha scissionis Lee & Stöhr & Bae & Shin 2019, sp. nov., Zoological Studies 58 (28), pp. 1-16 : 15

Key to Chinese male and female Lynceus

A key to Chinese Lynceus (males and females) is presented below. However, similar to the key to all Eurasian species provided by Rogers et al. (2016), caution is needed when attempting to identify lynceids from the northern and northeastern parts of China, because the morphology of L. mandsuricus females is unclear, and additional species reported from nearby may also occur in the region.

1. First thoracopod pair modified as claspers (males) .................... 2

– First thoracopod pair not modified as claspers (females)........... 4

2. Rostrum bifurcating basally; clasper endite 4 (“small palp”) digitiform.................................................................................... 3

– Rostrum medial carina bifurcating distally; clasper endite 4 bulbous (Taiwan) ................... Lynceus biformis ( Ishikawa, 1895)

3. Double carina bifurcating right below setal fields; clasper endopod (“movable finger”) only reaching to middle of endite III; clasper limb with one broadly transverse projection laterally between clasper “palm” and exopod (Yunnan) ............................. ......................................................... Lynceus amplopedia sp. nov.

– Double carina bifurcating distally to setal fields; clasper endopod reaching nearly to or slightly beyond endite III; clasper limb with two distinct projections laterally between clasper “palm” and exopod, distal one lobiform, proximal one broadly transverse (Liaoning).............................. Lynceus mandsuricus Daday, 1927

4. Rostrum with single medial carina, distal margin denticulate (Taiwan) ................................. Lynceus biformis ( Ishikawa, 1895)

– Rostrum bicarinate (double carina), distal margin smooth (Yunnan) ......................................... Lynceus amplopedia sp. nov.