Limnocoris, Stål, 1860

Rodrigues, Higor D. D. & Sites, Robert W., 2019, Revision of Limnocoris (Heteroptera: Nepomorpha: Naucoridae) of North America, Zootaxa 4629 (4), pp. 451-497 : 455-456

publication ID	https://doi.org/ 10.11646/zootaxa.4629.4.1
publication LSID	lsid:zoobank.org:pub:0DB18F90-AAFD-4FB7-B1ED-09A86A707C9F
persistent identifier	https://treatment.plazi.org/id/03E58815-E938-FFB3-FF61-F16FFA295E1D
treatment provided by	Plazi
scientific name	Limnocoris
status

Treatment

Key to the species of Limnocoris View in CoL of North America

1. Embolium with lateral margin prolonged into a long and curved spine; hemelytral membrane distinctly reduced ( Fig. 11A View FIGURE 11 ).......................................................................... Limnocoris moapensis (La Rivers) View in CoL

1’. Embolium with lateral margin convex, not prolonged into a long and curved spine; hemelytral membrane developed (e.g., Figs. 3A, C View FIGURE 3 ).............................................................................................. 2

2. Posterior margin of propleuron shallowly convex at mid-length ( Figs. 1 View FIGURE 1 B–D); mesosternum with longitudinal row of golden setae ( Fig. 2C View FIGURE 2 ); abdominal sterna with dispersed elongate golden setae ( Fig. 2H View FIGURE 2 ); lateral margin of female subgenital plate with elongate golden setae ( Fig. 2H View FIGURE 2 ).......................................................................... 3

2’. Posterior margin of propleuron straight ( Fig. 1A View FIGURE 1 ); mesosternum without longitudinal row of golden setae ( Fig. 2D View FIGURE 2 ); abdominal sterna without dispersed elongate setae (e.g, Fig. 2G View FIGURE 2 ); lateral margin of female subgenital plate without elongate golden setae (e.g., Fig. 2G View FIGURE 2 )....................................................................................... 10

3. Posterolateral corners of abdominal segments III–V produced posteriorly, spinose ( Fig. 2E View FIGURE 2 ); 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 View FIGURE 2 ); body length <9.20 mm ........................................................................ 5

4. Pubescent area of propleuron extended posteriorly to approximately halfway along lateral margin ( Fig. 1C View FIGURE 1 ); fossa of mesosternal carina shallow ( Fig. 17D View FIGURE 17 ).................................................. Limnocoris virescens Montandon View in CoL

4’. Pubescent area of propleuron not extended posteriorly along lateral margin (as in Fig. 1D View FIGURE 1 ); fossa of mesosternal carina deep ( Fig. 9D View FIGURE 9 ).......................................................................... Limnocoris major n. sp.

5. Mesosternal carina with elongate golden setae on lateral margin; fossa shallow, elongate, and narrow ( Figs. 3D, F View FIGURE 3 ).................................................................................. Limnocoris chaetocarinatus n. sp.

5’. Mesosternal carina without elongate setae on lateral margin; fossa not as above (e.g., Figs. 4C, 4E View FIGURE 4 , 13C, 13E View FIGURE 13 )............ 6

6. Pubescent area of propleuron not extended posteriorly on lateral margin (as in Fig. 1D View FIGURE 1 ); fossa of mesosternal carina deep, elliptical, sometimes with subtle angles at greatest width ( Figs. 13C, E View FIGURE 13 ); female subgenital plate with posterior margin evenly convex ( Fig. 13D View FIGURE 13 )........................................................... Limnocoris panamensis La Rivers View in CoL

6’. Pubescent area of propleuron distinctly extended posteriorly on lateral margin ( Fig. 1B View FIGURE 1 ); fossa of mesosternal carina shallow and semicircular ( Fig. 4C View FIGURE 4 ) or fossa obscured by lateral margins touching at midline ( Figs. 5C View FIGURE 5 , 15D View FIGURE 15 , 16 View FIGURE 16 D–E); female subgenital plate with posterior margin tapering posteriorly ( Figs. 4D View FIGURE 4 , 5D View FIGURE 5 , 15E View FIGURE 15 , 16G View FIGURE 16 )......................................... 7

7. Distal margin of labrum bluntly pointed ( Fig. 16F View FIGURE 16 ); mesosternal carina without excavation posterior to fossa in lateral view ( Figs. 16H View FIGURE 16 )................................................................. Limnocoris signoreti Montandon View in CoL

7’. Distal margin of labrum distinctly acuminate ( Figs. 4C View FIGURE 4 , 5C View FIGURE 5 , 15D View FIGURE 15 ); mesosternal carina with small excavation posterior to fossa in lateral view ( Figs. 2A View FIGURE 2 , 4E View FIGURE 4 , 5E View FIGURE 5 )......................................................................... 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 View FIGURE 4 ); lateral lobe of male tergum VIII with lateral margin shallowly concave in anterior half ( Fig. 6D View FIGURE 6 ); posterior margin of male sternum VIII with medial notch (as in Fig. 18B View FIGURE 18 ).......................................................................................... Limnocoris hintoni La Rivers View in CoL

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 View FIGURE 5 , 15D View FIGURE 15 ); lateral lobe of male tergum VIII with lateral margin straight in anterior half ( Figs. 6F View FIGURE 6 , 19B View FIGURE 19 ); 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 View FIGURE 5 )............................................................................................ Limnocoris inornatus Montandon View in CoL

9’. Body color usually light brown to yellowish; hemelytral membrane with pale spot medially ( Figs. 15A, C View FIGURE 15 )......................................................................................... Limnocoris pygmaeus La Rivers View in CoL

10. Mesosternal carina with median projection ( Figs. 2B View FIGURE 2 , 18E View FIGURE 18 ); fossa with small aperture anteriorly ( Figs. 2D View FIGURE 2 , 18C View FIGURE 18 ); posterior margin of male sternum VIII with medial notch ( Fig. 18B View FIGURE 18 ).................................. Limnocoris zacki n. sp.

10’. Mesosternal carina without median projection ( Figs. 7 View FIGURE 7 F–G, 8E, 12E); fossa without anterior aperture ( Figs. 7D View FIGURE 7 , 8C View FIGURE 8 , 12C View FIGURE 12 ); posterior margin of male sternum VIII without medial notch.................................................. 11

11’. Mesosternal carina with anterior projection lower than fossa ( Figs. 7 View FIGURE 7 F–G, 8E); fossa not open anteriorly, ranging from rounded to subtriangular; ridge without sulcus ( Figs. 7D View FIGURE 7 , 8C View FIGURE 8 )........................................................ 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 View FIGURE 7 F–G); antennal flagellomeres not partially fused; apex of left medial lobe of male tergum VIII distinctly angled laterally ( Fig. 10B View FIGURE 10 ).......................... Limnocoris insularis Champion View in CoL

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 View FIGURE 8 ); antennal flagellomeres partially fused; apex of left medial lobe of male tergum VIII slightly angled laterally ( Fig. 10D View FIGURE 10 )................................................... Limnocoris lutzi La Rivers View in CoL