Larval ground plan of Platynectes Régimbart, 1879 reconsidered: description of the larvae of three species with phylogenetic considerations (Coleoptera: Adephaga, Dytiscidae) Author Alarie, Yves School of Natural Sciences, Laurentian University, Ramsey Lake Road, Sudbury, Ontario, Canada. Author Michat, Mariano C. University of Buenos Aires, Faculty of Exact and Natural Sciences, Department of Biodiversity and Experimental and Applied Biology (IBBEA), Buenos Aires, Argentina. Author Short, Andrew E. Z. Entomology and Nematology Department, University of Florida, Gainesville, FL, USA. Author Watts, Chris H. S. South Australian Museum, North Terrace, Adelaide, SA 5000, Australia. text Zootaxa 2024 2024-05-29 5458 3 301 331 http://dx.doi.org/10.11646/zootaxa.5458.3.1 journal article 298358 10.11646/zootaxa.5458.3.1 3ef97aa0-1ee6-4a12-b5ab-1892100c2708 1175-5326 11547417 730298E6-ECD7-4F03-9030-7A5E8F3E7272 P. bakewelli ( Clark, 1863 ) Source of material. The larvae studied were collected in association with adults at the following locality: Tasmania : 5 Km SE Gormanston , 3.x.2002 , leg. C.H.S.Watts. Diagnosis. With the exception of P. agallithoplotes whose larva remains easily recognizable for the reasons mentioned above, the larva of P. bakewelli is more likely to be confused with those of either P. curtulus , P. davidorum , P. decemnotatus , or P. reticulosus of which it can easily be identified by the combination of following characters: frontoclypeus at level of adnasalia ( Figs 26 , 40 ), presence of four lamellae clypeales (instar I) ( Fig. 26 ), presence of an occipital suture (instars II–III) ( Fig. 40 ), A/MP <1.50, A3’ not protruding, hole-like ( Fig. 29 ), galea (instar III) <0.40 times length of maxillary palpomere 1, prementum lacking an additional seta dorsally ( Fig. 33 ), primary setae LA3, LA4, LA5, LA8 minute ( Fig. 33 ), primary seta LA10 inserted at about same level as seta LA11 ( Fig. 33 ), primary seta TA1 inserted distally ( Fig. 36 ), primary setae CO7 and CO10 elongate, much longer than either seta CO4 or CO5 ( Fig. 35 ), absence of secondary dorsal spine-like setae on femur (instar III) ( Figs 42–43 ), metatibia with spinulae along ventral margin ( Figs 42–43 ), metathoracic legs (instar III) 2.50–3.40 times as long as HW, primary setae AB8 and AB14 spiniform ( Fig. 37 ), and urogomphus lacking secondary setae ( Fig. 41 ).