On the penaeid shrimps of the genus Parapenaeopsis Alcock, 1901 (Crustacea, Decapoda) from Taiwan Author Hsu, Yen-Cheng 0000-0001-5829-1793 Institute of Marine Biology, National Taiwan Ocean University, Keelung 202301 Taiwan, R. O. C. https: // orcid. org / 0000 - 0001 - 5829 - 1793 Author Chan, Tin-Yam 0000-0001-5829-1793 Institute of Marine Biology, National Taiwan Ocean University, Keelung 202301 Taiwan, R. O. C. https: // orcid. org / 0000 - 0001 - 5829 - 1793 & Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202301 Taiwan, R. O. C. text Zootaxa 2023 2023-11-01 5361 2 221 236 https://www.mapress.com/zt/article/download/zootaxa.5361.2.4/52179 journal article 10.11646/zootaxa.5361.2.4 1175-5326 D6B173BF-D5B8-4143-9F18-8B4CE7A4C28F Key to the species of Parapenaeopsis in Taiwan 1. Pereiopods I and II without epipod....................................................................... 2 - Pereiopods I and II with epipod.......................................................................... 3 2. Epigastric tooth present......................................................................... P. venusta - Epigastric tooth absent........................................................................... P. tenella 3. Rostrum either very long or very short, far overreaching antennular peduncle or not exceeding second segment of antennular peduncle; longitudinal suture long, extending near to posterior carapace............................... .. P. hardwickii - Rostrum extending to distal segment of antennular peduncle; longitudinal suture short, extending to about level of epigastric tooth............................................................................................... 4 4. Male endopod of pleopod II strongly modified and sock-like; petasma with tip of distolateral projection only protruded at outer side; thelycum with posterior plate bearing median boss; tuft of setae behind thelycum thick and long, bluish in color.................................................................................................. P. cornuta - Male endopod of pleopod II normal in shape, not modified; petasma with tip of distolateral projection protruded on both sides; thelycum with posterior plate lacking median boss; tuft of setae behind thelycum thin and short, colorless........ P. amicus