The larva of Polycentropus ierapetra Malicky 1972 (Trichoptera: Polycentropodidae), including a key to the larvae of genus Polycentropus (Curtis 1835) in the Hellenic western Balkan region Author Karaouzas, Ioannis Author Waringer, Johann text Zootaxa 2017 4294 5 586 592 journal article 32625 10.11646/zootaxa.4294.5.7 f6517fa6-63f4-4b3d-b3ad-59d55b9d60d0 1175-5326 833855 3AB62CA2-F703-49FC-90DC-4FBCD3403989 Key to final instar larvae of Polycentropodidae genera and Polycentropus species in the Hellenic western Balkan region (= European Ecoregion 6). 1 Basal segment of anal proleg without bristles ( Fig. 8 a); pair of short spines present on abdominal sternum IX ( Fig. 8 b)............................................ Neureclipsis McLachlan 1864 (only Neureclipsis bimaculata (Linnaeus 1758)) - Basal segment of anal proleg with numerous bristles; short spines lacking ( Fig. 4 )..................................2 2 Inner apex of anal claw with four blunt teeth ( Fig. 9 c)...... Cyrnus Stephens 1836 (only Cyrnus trimaculatus (Curtis 1834)) - Inner apex of anal claw smooth ( Fig. 4 )....................................................................3 3 Ratio of protarsal length / protibial length <0.50............................................................ 4 - Ratio of protarsal length / protibial length>0.70 ( Fig. 2 ); anal claw obtuse-angled ( Fig. 4 )...........................5 4 Anal claw obtuse-angled (as in Fig. 4 ); distance between median border of spot ‘m’ and frontoclypeal suture greater than length of this spot ( Fig. 5 ).................................................. Polycentropus excisus Klapálek 1894 - Anal claw right-angled ( Fig. 7 ); distance between median border of spot ‘m’ and frontoclypeal suture equal to length of this spot ( Fig. 6 )........................................................ Polycentropus flavomaculatus ( Pictet 1834 ) 5 Head width < 1.65 mm ................................................... Polycentropus ierapetra Malicky 1972 - Head width> 1.65 mm ........................................................... Plectrocnemia Stephens 1836 (The larvae of only three species within European Ecoregion 6 are known: P. brevis McLachlan 1871 , P. conspersa ( Curtis 1834 ) , and P. geniculata McLachlan 1871 ; these species can be identified using the keys of Edington & Hildrew 1995 and Waringer & Graf 2011 ).