Stenotarsus Subtilis Arrow, The Aggregating Fungus Beetle Of Barro Colorado Island Nature Monument, Panama (Coleoptera: Endomychidae) Author Roubik, David W. Author Skelley, Paul E. text The Coleopterists Bulletin 2001 2001-09-30 55 3 249 263 http://dx.doi.org/10.1649/0010-065x(2001)055[0249:ssataf]2.0.co;2 journal article 10.1649/0010-065X(2001)055[0249:SSATAF]2.0.CO;2 10102784 Key to the Known Stenotarsus of Panama 1) Antennomeres III–VIII not elongate, moniliform; antennal club segments narrow, nearly parallel sided ( Fig. 1 ) ---------------- S. validicornis Gerstaecker 1') Some or all of antennomeres III–VIII elongate; antennal club segments not narrowed ( Figs. 2, 3 ) ----------------------------------------------------------------------------------------- 2 2) Antennomere XI elongate and appearing curved ( Fig. 2 ); antenna long, reaching middle of elytra ---------------------------------------- S. purpuratus Gerstaecker 2') Antennomere XI oval, not elongated or curved ( Fig. 3 ); antenna not as long, reaching only basal 1/3 of elytra -------------------------------------------------------------- 3 3) Pronotal lateral margin relatively narrow ( Fig. 4 ), width at hind angle distinctly less than length of antennomere II ------- S. cyanopterus Gorham 3') Pronotal lateral margin broad for entire length ( Figs. 5–7 ), width at hind angle equal or greater than length of antennomere II ---------------------------------- 4 4) Base of pronotum between pores with margin weak or absent ( Fig. 5 ); pronotal base weakly concave over scutellum --- S. lemniscatus Gorham Figs. 8–18. Stenotarsus spp. : 8–10) Dorsal habitus: 8) Stenotarsus cuprivestis ; 9) S. panamanus ; 10) S. subtilis . 11–14) Ventral view of male: 11) S. globosus ; 12) S. obtusus ; 13) S. ovalis ; 14) S. subtilis . 15–18) Aedeagus, ventral and lateral views: 15) S. panamanus ; 16) S. obtusus ; 17) S. ovalis ; 18) S. subtilis . Scale line = 1 mm. 4') Base of pronotum between pores with strong margin that leads into the pores ( Figs. 6, 7 ); pronotal base convex over scutellum ---------------------------- 5 5) Elytron with basal punctures in the depression next to the humerus not much larger than those near the scutellum ( Fig. 6 ); disc of elytron with weak foveate punctures ------------------------------------------------------------- S. subtilis Arrow 5') Elytron with coarse basal punctures in the depression next to the humerus distinctly larger than those near the scutellum ( Fig. 7 ); disc of elytron with notable foveate punctures, often impressed ------------------------------------------------------ 6 6) Body relatively elongate and small, less than 4.5 mm ( Fig. 8 ) ------------------------- ------------------------------------------------------------------------------------------------------------------------- S. cuprivestis Gorham 6') Body oval and larger, generally more than 4.5 mm ( Figs. 9, 10 ) ----------- 7 7) Body with color pattern ( Fig. 9 ) --------------------------------------------------------------------------- 8 7') Body entirely orange ( Fig. 10 ) ------------------------------------------------------------------------------ 9 8) Pronotal pubescence dark purple to black (best viewed in profile); metafemur of male with basal spine ( Fig. 11 ) -------- S. globosus Guérin­Méneville 8') Pronotal pubescence golden­yellow; metafemur of male lacking spine ------ -------------------------------------------------------- S. panamanus Gorham and S. chiriquinus Arrow 9) Male metatrochanter lacking spine; male genitalia long and narrow ( Fig. 15 ) ----------------------------------------------------------------------------------------- S. panamanus Gorham 9') Male metatrochanter with spine ( Figs. 12–14 ); male genitalia relatively short and broad ( Figs. 16–18 ) ----------------------------------------------------------------------------- 10 10) Male with circular depression on anterior part of metasternum ( Fig. 12 ); male genitalia simple, lacking accessory process ( Fig. 16 ) ------------------------- ----------------------------------------------------------------------------------------------------------------------- S. obtusus Gerstaecker 10) Male with transversely elongated depression on anterior part of metasternum ( Fig. 13 ); male genitalia with an accessory process ( Fig. 17 ) ----- ---------------------------------------------------------------------------------------------------------------------------------------- S. ovalis Arrow