Platorchestiinae subfam. nov. (Amphipoda, Senticaudata, Talitridae) with the description of three new genera and four new species Author Lowry, J. K. Author Myers, A. A. 0000-0003-3256-2123 School of Biological, Earth and Environmental Sciences, University College Cork, Cork Enterprise Centre, Distillery Fields, North Mall, Cork, Ireland. bavayia @ gmail. com; https: // orcid. org / 0000 - 0003 - 3256 - 2123 bavayia@gmail.com text Zootaxa 2022 2022-02-17 5100 1 1 53 journal article 20608 10.11646/zootaxa.5100.1.1 cabdbbb1-1226-4c2e-b90b-fae0742b5091 1175-5326 6127681 F42DAC62-0E30-442E-A375-87FC02B2CC99 Insularorchestia monodi (Mateus, Mateus & Afonso, 1986) comb. nov. ( Fig. 11 ) Orchestia monodi Mateus, Mateus & Afonso, 1986: 100 , figs 1–7. Platorchestia monodi Kim et al. 2013 : table 1. Not Platorchestia platensis forma monodi .— Stock & Biernbaum, 1994: 796 , fig. 1 (= P. susorum sp. nov. ).— Wildish & Radulovici, 2019: 2415 , table 1, 2418, table 2, 2422, table 4, 2426, table 6 (zoogeography). Not Orchestia platensis .—Oliveria, 1953: 329, figs 10–12 (= undescribed new species of Serejo 2004 ).— Soares, 1979: 97 (= undescribed new species of Serejo 2004 ). Not Platorchestia monodi .— Morino & Ortal, 1995: 825 , figs 1–3.— Stock, 1996: 150 , figs 2–4 (part).— Salman & Abdullah, 1997: 39 , figs 1–3.— Serejo, 2004: 14 , figs 7–10 (= undescribed new species).— Rosa et al ., 2007: 38 (ecology) (= undescribed new species of Serejo 2004 ).— Kim & Min, 2011: 206–210 , figs 1–4 (= P. koreaensis sp. nov. ).— Kim, Jung & Min, 2013: 839 , table 2,3,9,10 (molecular). Non-Taxonomic Citations Platorchestia monodi .— Wildish & Radulovici, 2019: 2415 , table 1, 2418, table 2, 2422, table 4, 2426, table 6 (in part – only references to the Azores . zoogeography). FIGURE 10. Insularorchestia ashmoleorum ( Stock, 1996 ) , after Stock, 1996 . FIGURE 11. Insularorchestia monodi (Mateus, Mateus & Afonso, 1986) , after Mateus, Mateus & Afonso, 1986. Types. Holotype , male, 9.2 mm , paratypes , 8.5 (ovigerous and non-ovigerous females) in the Collection of Amphipoda of the Mission Biaçores lodged in the l’Institut de Zoologie “Dr. Augusto Nobre” de la Faculte des Sciences de Porto , as labelled: N.º 43a- Orchestia monodi sp. n. A. et E. Mateus, O. Afonso. Type locality. Santos beach, São Miguel Island , Azores , North Atlantic Ocean . Ecological type . Beach-hopper. Habitat. Found on the sea shores of Azores . It prefers protected beaches and can be found in estuarine areas and mangroves. On a beach to the east of Ponta Delgada and another beach in the north of the island. Diagnosis (male). Based on Mateus, Mateus & Afonso (1986). Gnathopod 2 propodus palm acute, without sinuses; dactylus not modified distally, blunt. Pereopod 6 coxa posterior lobe with anteroventral corner produced. Remarks. Insularorchestia monodi has been erroneously reported from many places, but it appears to be confined to the Azores . There is no palmar notch of the male gnathopod 2 and the distal end of the dactylus is blunt. It should be noted that this species is based on material that is only 9.2 mm in length and may be immature. Distribution. North Atlantic Ocean . Azores : São Miguel Island (Mateus, Mateus & Afonso 1986).