Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist Author Polhemus, Dan A. text Zootaxa 2020 2020-05-07 4772 1 132 182 journal article 22330 10.11646/zootaxa.4772.1.5 b14b0d0d-cf67-4895-965c-12792c622b21 1175-5326 3814079 B497198A-08CD-4A21-AE04-14390499853B Key to males of the species of Enithares occurring on New Guinea and nearby islands 1. Paramere large and well-developed, reaching to or exceeding dorsal margin of posterior lobe of pygophore ( Figs. 16–21 , 35–38 ); posterior lobe (PL) of pygophore erect, truncate, bearing a small apical notch anterodorsally ( Figs. 16–21 , 35–38 ); lateral arms of the basal plate (LABP) elongate and modified distally ( Figs. 16–21 , 35–38 ).............( E. atra group) ... 2 - Paramere small or vestigial ( Figs. 39, 40 , 49–54 ); PL rounded or angular, without an anterodorsal notch ( Figs. 39, 40 , 49–54 ); LABP shorter, stouter ( Figs. 39, 40 , 49–54 )................................................................ 11 2. Body length exceeding 12 mm ( Figs. 28, 29 , 31, 32 )......................................................... 3 - Body length distinctly less than 12 mm .................................................................... 4 3. LABP tapering distally, apex slightly hooked ( Fig 37 ); central New Guinea mountains........................ E. stylata - LABP expanded distally, apex truncate ( Fig 21 ); Papuan Peninsula................................... E. peninsularis 4. LABP slender on distal half, with apex acute or slightly secondarily expanded ( Figs. 18, 19 , 36 )....................... 5 - LABP stout on distal half, apex blunt or broadly flared ( Figs. 16, 20 , 35 )......................................... 9 5. Distal section of LABP tapering throughout its length, apex slender and acuminate ( Fig. 36 ); central mountains of western New Guinea ......................................................................................... E. ziwa - Distal section of LABP not tapering as strongly as above, apex rounded or bluntly angled ( Figs. 17–19 )................. 6 6. Anterior width of vertex less than length of head; distal section of LABP slender, apex rounded ( Figs. 17, 18 )............ 7 - Anterior width of vertex greater than length of head; distal section of LABP thicker than above ( Figs. 19 , 38 )............ 8 7. Apex of LABP expanded and bulb-like ( Fig. 18 ); ventral margin of proctiger broadly curved ( Fig. 18 ); D’Entrecasteaux Islands....................................................................................... E. insularis - Apex of LABP rounded, weakly expanded, not bulb-like, curving slightly upward ( Fig. 17 ); ventral margin of proctiger angular ( Fig. 17 ); southern Papuan Peninsula.................................................................. E. atra 8. LABP with apex forming a truncate upturned angle ( Fig. 19 ); Mt. Bosavi, southeastern New Guinea ............. E. bosavi - Apex of LABP curving gently downward ( Fig. 38 ); Louisiade Archipelago................................. E. tagula 9. Distal section of LABP with apex expanded to varying degrees ( Figs. 16 , 35 ); northeastern New Guinea ............... 10 - Distal section of LAPB of relatively even width throughout, apex truncate ( Fig. 20 ); southeastern New Guinea or Waigeo Island............................................................................................... 11 10. Apex of LABP highly expanded, flaring and bi-angular ( Fig. 35 )........................................ E. elongata - Apex of LABP not so strongly expanded as above, not bi-angular ( Fig. 16 )................................. E. orsaki 11. Ventrolateral angle of pygophore produced and acute; posterior margin of PL angled anteriorly; Waigeo Island.... E. digitata - Ventrolateral angle of pygophore obtuse, not produced ( Fig. 20 ); posterior margin of PL nearly vertical ( Fig. 20 ); southeastern New Guinea ................................................................................... E. papua 12. Dorsal apex of PL bearing stout, spine-like setae ( Figs. 39, 40 )................................ ( E. bakeri group) ... 13 - Dorsal apex of PL lacking stout, spine-like setae ( Figs. 49–54 )............................. ( E. megalops group) ... 14