Elaphidion

Ivie, Michael A. & Schwengel-Regala, Michelle L., 2007, The Elaphidion Audinet-Serville of the Puerto Rican Bank: new species, distributions, taxonomic corrections, and a key to species (Coleoptera: Cerambycidae: Elaphidiini), Zootaxa 1503, pp. 55-68 : 62-63

Key to species of Elaphidion of Puerto Rico and the Virgin Islands

1. Third and fourth antennomeres spined on both internal and external apical angles.....................................2

1’ Third and fourth antennomeres spined only on internal angle.....................................................................3

2. Prosternal process parallel-sided, rounded apically, with caudad apex at median; length 30 mm or greater; Puerto Rico............................................................................................................................ E. michelii Ivie

2’ Prosternal process widened and truncate apically, sometimes emarginate medially, median not most caudad point; length 25 mm or less; widespread .................................................. E. conspersum (Newman)

3. Integument dark chocolate brown to black, with patches of white pubescence on head, pronotum and elytra; emargination between apical elytral spines obliquely truncate to weakly bisinuate so that sutural spine is shorter .................................................................................................................... E. irroratum (L.)

3’ Integument light brown to dark chocolate brown, with ochre to golden pubescence; emargination between apical elytral spines simply arcuate, both spines long, although outer may be longer.................................4

4. Metafemoral apex spiniform, spine longer than basal metatibial width; antennomere 4 short relative to 5; apical spine of male antennomere 3 greater than 0.5 × length of antennomere 4; apical spine of female antennomere 3 subequal to or longer than length of antennomere 4; setae of pronotal and elytral disk broader, rounded-blunt at apex ............................................................................................ E. mayesae Ivie

4’ Metafemoral apex dentiform, spine subequal to basal metatibial width; antennomere 4 longer relative to 5; apical spine of male antennomere 3 less than 0.5 × length of antennomere 4; apical spine of female antennomere 3 distinctly shorter than antennomere 4; setae of pronotal and elytral disk narrow, acutely attenuate at apex....................................................................................................................................................5

5. Lighter in color, setae generally distributed on elytral disc, allowing derm to show through between, always visible just mesad humeral umbone and between striae at level of metacoxa ( Figs 15 , 17 ); punctures of basal portion of elytral disc smaller (Fig. 19); Northern Virgin Islands........ E. pseudonomon Ivie

5’ Darker in color, setae clumped in dense patches, completely hiding derm, giving a distinct patterned appearance, density always visible just mesad humeral umbone and between striae at level of metacoxa ( Figs 14 , 16 ); punctures of basal portion of elytral disc larger (Fig. 18); St. Croix and Lesser Antilles ...... ................................................................................................................................ E. glabratum (Fabricius)

Figures

FIGURES 12 – 15. Elaphidion. 12. E. michelii, male; 13. E. michelii, female, a = antenna; 14. E. conspersum, female; 15. E. irroratum, female. Scale bars = 1 mm.

FIGURES 16 – 17. Dorsal view of left elytral base (scale bar = 1 mm). 16. E. glabratum; 17. E. pseudonomon. FIGURES 18 – 19. Dorsal view of left mid-elytra (anterior to right) (scale bar = 1 mm). 18. E. glabratum; 19. E. pseudonomon.