Limnocoris

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

http://treatment.plazi.org/id/03E58815-E938-FFB3-FF61-F16FFA295E1D

treatment provided by

Plazi

scientific name

Limnocoris
status

 

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. 11AView FIGURE 11).......................................................................... 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, CView FIGURE 3).............................................................................................. 2

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

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

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

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

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

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

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

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

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

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

7’. Distal margin of labrum distinctly acuminate ( Figs. 4CView FIGURE 4, 5CView FIGURE 5, 15DView FIGURE 15); mesosternal carina with small excavation posterior to fossa in lateral view ( Figs. 2AView FIGURE 2, 4EView FIGURE 4, 5EView 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. 4CView FIGURE 4); lateral lobe of male tergum VIII with lateral margin shallowly concave in anterior half ( Fig. 6DView FIGURE 6); posterior margin of male sternum VIII with medial notch (as in Fig. 18BView FIGURE 18).......................................................................................... 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. 5CView FIGURE 5, 15DView FIGURE 15); lateral lobe of male tergum VIII with lateral margin straight in anterior half ( Figs. 6FView FIGURE 6, 19BView 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. 5AView FIGURE 5)............................................................................................ Limnocoris inornatus Montandon 

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

10. Mesosternal carina with median projection ( Figs. 2BView FIGURE 2, 18EView FIGURE 18); fossa with small aperture anteriorly ( Figs. 2DView FIGURE 2, 18CView FIGURE 18); posterior margin of male sternum VIII with medial notch ( Fig. 18BView FIGURE 18).................................. Limnocoris zacki  n. sp.

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

11’. Mesosternal carina with anterior projection lower than fossa ( Figs. 7View FIGURE 7 F–G, 8E); fossa not open anteriorly, ranging from rounded to subtriangular; ridge without sulcus ( Figs. 7DView FIGURE 7, 8CView 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. 7View FIGURE 7 F–G); antennal flagellomeres not partially fused; apex of left medial lobe of male tergum VIII distinctly angled laterally ( Fig. 10BView FIGURE 10).......................... 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. 8EView FIGURE 8); antennal flagellomeres partially fused; apex of left medial lobe of male tergum VIII slightly angled laterally ( Fig. 10DView FIGURE 10)................................................... Limnocoris lutzi La Rivers