Revision of Limnocoris (Heteroptera: Nepomorpha: Naucoridae) of North America Author Rodrigues, Higor D. D. Author Sites, Robert W. text Zootaxa 2019 2019-07-09 4629 4 451 497 journal article 26265 10.11646/zootaxa.4629.4.1 4d76ea5b-ee7f-4361-8f18-595631a770e6 1175-5326 3274050 0DB18F90-AAFD-4FB7-B1ED-09A86A707C9F Key to the species of Limnocoris of North America 1. Embolium with lateral margin prolonged into a long and curved spine; hemelytral membrane distinctly reduced ( Fig. 11A ).......................................................................... Limnocoris moapensis (La Rivers) 1’. Embolium with lateral margin convex, not prolonged into a long and curved spine; hemelytral membrane developed (e.g., Figs. 3A, C ).............................................................................................. 2 2. Posterior margin of propleuron shallowly convex at mid-length ( Figs. 1 B–D); mesosternum with longitudinal row of golden setae ( Fig. 2C ); abdominal sterna with dispersed elongate golden setae ( Fig. 2H ); lateral margin of female subgenital plate with elongate golden setae ( Fig. 2H ).......................................................................... 3 2’. Posterior margin of propleuron straight ( Fig. 1A ); mesosternum without longitudinal row of golden setae ( Fig. 2D ); abdominal sterna without dispersed elongate setae (e.g, Fig. 2G ); lateral margin of female subgenital plate without elongate golden setae (e.g., Fig. 2G )....................................................................................... 10 3. Posterolateral corners of abdominal segments III–V produced posteriorly, spinose ( Fig. 2E ); body length ≥ 9.20 mm ...... 4 3’. Posterolateral corners of abdominal segments III–V not produced posteriorly, narrowly rounded to right angled, not spinose ( Fig. 2F ); body length < 9.20 mm ........................................................................ 5 4. Pubescent area of propleuron extended posteriorly to approximately halfway along lateral margin ( Fig. 1C ); fossa of mesosternal carina shallow ( Fig. 17D ).................................................. Limnocoris virescens Montandon 4’. Pubescent area of propleuron not extended posteriorly along lateral margin (as in Fig. 1D ); fossa of mesosternal carina deep ( Fig. 9D ).......................................................................... Limnocoris major n. sp. 5. Mesosternal carina with elongate golden setae on lateral margin; fossa shallow, elongate, and narrow ( Figs. 3D, F ).................................................................................. Limnocoris chaetocarinatus n. sp. 5’. Mesosternal carina without elongate setae on lateral margin; fossa not as above (e.g., Figs. 4C, 4E , 13C, 13E )............ 6 6. Pubescent area of propleuron not extended posteriorly on lateral margin (as in Fig. 1D ); fossa of mesosternal carina deep, elliptical, sometimes with subtle angles at greatest width ( Figs. 13C, E ); female subgenital plate with posterior margin evenly convex ( Fig. 13D )........................................................... Limnocoris panamensis La Rivers 6’. Pubescent area of propleuron distinctly extended posteriorly on lateral margin ( Fig. 1B ); fossa of mesosternal carina shallow and semicircular ( Fig. 4C ) or fossa obscured by lateral margins touching at midline ( Figs. 5C , 15D , 16 D–E); female subgenital plate with posterior margin tapering posteriorly ( Figs. 4D , 5D , 15E , 16G )......................................... 7 7. Distal margin of labrum bluntly pointed ( Fig. 16F ); mesosternal carina without excavation posterior to fossa in lateral view ( Figs. 16H )................................................................. Limnocoris signoreti Montandon 7’. Distal margin of labrum distinctly acuminate ( Figs. 4C , 5C , 15D ); mesosternal carina with small excavation posterior to fossa in lateral view ( Figs. 2A , 4E , 5E )......................................................................... 8 8. Fossa of mesosternal carina with lateral margins generally touching each other at middle, leaving a wide, circular or subtriangular posterior opening and small separation anteriorly ( Fig. 4C ); lateral lobe of male tergum VIII with lateral margin shallowly concave in anterior half ( Fig. 6D ); posterior margin of male sternum VIII with medial notch (as in Fig. 18B ).......................................................................................... Limnocoris hintoni La Rivers 8’. Fossa of mesosternal carina with lateral margins touching each other along most of its length, leaving only a small opening at anterior and posterior ends ( Figs. 5C , 15D ); lateral lobe of male tergum VIII with lateral margin straight in anterior half ( Figs. 6F , 19B ); posterior margin of male sternum VIII without medial notch........................................... 9 9. Body color usually brown to dark brown; hemelytral membrane without pale spot medially ( Fig. 5A )............................................................................................ Limnocoris inornatus Montandon 9’. Body color usually light brown to yellowish; hemelytral membrane with pale spot medially ( Figs. 15A, C )......................................................................................... Limnocoris pygmaeus La Rivers 10. Mesosternal carina with median projection ( Figs. 2B , 18E ); fossa with small aperture anteriorly ( Figs. 2D , 18C ); posterior margin of male sternum VIII with medial notch ( Fig. 18B ).................................. Limnocoris zacki n. sp. 10’. Mesosternal carina without median projection ( Figs. 7 F–G, 8E, 12E); fossa without anterior aperture ( Figs. 7D , 8C , 12C ); posterior margin of male sternum VIII without medial notch.................................................. 11 11. Mesosternal carina with anterior projection well-developed, almost at same level of fossa (Fig. 12E); fossa elongate, with lateral margins convergent and meeting posteriorly but open ended anteriorly; anterior ridge entering open anterior end of fossa; ridge with fine longitudinal sulcus on midline (Fig. 12E).................................... Limnocoris nanus n. sp. 11’. Mesosternal carina with anterior projection lower than fossa ( Figs. 7 F–G, 8E); fossa not open anteriorly, ranging from rounded to subtriangular; ridge without sulcus ( Figs. 7D , 8C )........................................................ 12 12. Region between anterior projection and fossa of mesosternal carina almost straight or slightly sinuate in lateral view, and angled dorsoventrally ~20 degrees from the long body axis ( Figs. 7 F–G); antennal flagellomeres not partially fused; apex of left medial lobe of male tergum VIII distinctly angled laterally ( Fig. 10B ).......................... Limnocoris insularis Champion 12’ Region between anterior projection and fossa of mesosternal carina concave in lateral view, and angled dorsoventrally ~70 degrees from the long body axis ( Fig. 8E ); antennal flagellomeres partially fused; apex of left medial lobe of male tergum VIII slightly angled laterally ( Fig. 10D )................................................... Limnocoris lutzi La Rivers