Notoplana longiducta Hyman, 1959: 10 Notoplana longicrumena Prudhoe, 1982: 369–370 Notocomplana longiducta Faubel, 1983: 114 Biodiversity of intertidal marine flatworms (Polycladida, Platyhelminthes) in southeastern Australia Rodríguez, Jorge Hutchings, Pat A. Williamson, Jane E. Zootaxa 2021 2021-08-23 5024 1 1 63 Hyman, 1959 Hyman 1959 [151,588,402,429] Notoplanidae Notoplana Animalia Polycladida 42 43 Platyhelminthes species longiducta  ( Fig. 16)      Notoplana longiducta Hyman, 1959: 10, figs 12, 13.     Notoplana longicrumena Prudhoe, 1982: 369–370, fig. 4.     Notocomplana longiducta Faubel, 1983: 114.   Material examined:  Onespecimen sagittally sectioned. AMW.53210 (4 slides). A specimen was collected at low tide under rocks from Australia, New South Wales, Bottle& Glass, 33°50’53.9”S, 151°16’12.3”E. Coll. Jorge Rodriguezand Justin McNab,  October 25 th, 2019. Additional material from Australia, New South Wales, Long Reeffrom the collections of the Australian Museum: AMW.3693 ( holotype), W.3694.   Notoplana longicrumena  Prudhoe, 1982. Onespecimen from the collections of the Australian Museum, sagittally sectioned. AMW.53211 (8 slides). Thespecimen was collected from Australia, Tasmania,  Pirates BayReef,  March 7 th, 1958. Additional material from Australia, South Australia, Point Brownfrom the collections of the South Australian Museum: AHC.42652–42668 ( holotype).   Remarks:Externally,  Notoplana longiducta Hyman, 1959possesses an elongated body shape with a pale brown dorsal colouration, a transparent body margin and an anteriorly positioned pharynx ( Fig. 16A–D). Internally,  N. longiductais characterised by the presence of a seminal vesicle, interpolated prostatic vesicle lined with tubularly chambered glandular epithelium, a very elongated penis stylet and a simple female system with a vertically oriented Lang’s vesicle ( Fig. 16E–I).  Hyman (1959)mentions the poor state of the male copulatory system in the histological sections and the difficulties it caused in reconstructing its anatomy. In the original description Hyman (1959)describes  Notoplana longiductaas having an elongated and pointed penis papilla; however, a revision of the type material made clear that what was described as a penis papilla was in fact a fold of the male atrium ( Fig. 16I). Hyman (1959)mentions not only that the histological sections are in poor condition but that the cuts were not performed in an exact sagittal plane, which explains the misidentification of this trait. It was also apparent in both the holotypeand the specimen from Bottle & Glass that this species presents a stylet in its male copulatory organ, although it was overlooked in the original description due to the poor condition of the type material ( Fig. 16I).  Faubel (1983)transferred  Notoplana longiductato the new genus  Notocomplanacreated for  Notoplanaspeciesnot bearing a stylet. However, a re-examination of the holotypeand new material revealed the presence of such trait in the male copulatory organ. As such, the present species was transferred back to  Notoplanaunder the original combination  Notoplana longiducta.  Prudhoe (1982)described the new species  Notoplana longicrumenafrom Point Brown, South Australiabased on the presence of a long and slender penis stylet. Re-examination of the typematerial showed that the internal anatomy was identical to that of  N. longiductain light of the new description ( Fig. 16G). As such, the primary authority belongs to Hyman (1959)and  N. longicrumenawas synonymised with  N. longiducta.   Distribution: Australia: New South Wales, Long Reef ( Hyman 1959), South Australia, Point Brown ( Prudhoe, 1982).  New record: Australia, Tasmania, Pirates Bay Reef. 2019-10-25 AM Bottle & Glass & Coll. Jorge Rodriguez & Justin McNab Australia -33.848305 One 1 151.27008 42 43 1 New South Wales AM Australia Australian Museum Long Reef 42 43 1 New South Wales holotype [500,672,783,809] 1958-03-07 AM Australia One The Australian Museum 42 43 1 Tasmania Australia South Australian Museum Point Brown 42 43 1 South Australia holotype