Apetasimus

Ewing, Curtis, 2006, Revision of the endemic Hawaiian sap beetle genus Apetasimus Sharp 1908 (Coleoptera: Nitidulidae), Zootaxa 1385, pp. 1-30 : 6-7

publication ID	https://doi.org/ 10.5281/zenodo.175088
DOI	https://doi.org/10.5281/zenodo.6254932
persistent identifier	https://treatment.plazi.org/id/464B425A-FF9A-244B-FE93-FC6D14B3FEA3
treatment provided by	Plazi
scientific name	Apetasimus
status

Treatment

Key to Apetasimus View in CoL

1) Body smaller, 4.0– 4.8mm, if larger, pronotal setae disorganized or organized and sparse, never dense, surface evenly depressed or convex ......................................... 2

1') Body large, 5.0– 6.7mm, rarely as small as 4.5mm, prosternal process expanded in ventral and lateral views, and weakly recurved dorsad at apex ( Fig. 7 View FIGURE 7. A. A B, 7C), pronotal setae long, dense, disorganized ( Fig. 7A View FIGURE 7. A. A ), pronotum depressed and uneven, (guttatus- group) ............................................................................................................... 7

2) Elytra with distinct lateral post-humeral depression, lateral margin narrow ( Figs. 5 View FIGURE 5 B, 6J); lobes of tarsomere 3 large ( Figs. 5 View FIGURE 5 P, 6I), lobes bearing dense setal pads ventrally. Wings not reduced,> 2X elytral length. (pleomelarrosus- group). .................. 3

2’) Elytra lacking post humeral depression, lateral margin explanate ( Figs. 4 View FIGURE 4 A, 4I, 4K); lobes of tarsomere 3 small ( Figs. 2 View FIGURE 2 J, 4F, 4M), tarsi with ventral setae sparse. Wings reduced to less than 1/2 elytral length (involucer- group) ......................................... 4

3) Pronotum with weakly emarginate anteriorly, posterior margin broadly rounded, anterior and posterior marginal width subequal ( Fig. 5 View FIGURE 5 C); elytral surface with interstices smooth for entire length. Length 6.3–8.3mm, endemic to Kauai. .................... ......................................................................................... A . pleomelarrosus, sp. nov.

3’) Pronotum strongly emarginate anteriorly, posterior margin sinuate, anterior margin narrower than posterior margin ( Fig. 6 View FIGURE 6 C); elytral surface with raised areas on interstices. Length 4.7mm, endemic to Hawaii .................................... A . debbiae sp. nov.

4) Eyes large, 12 facets across lateral surface ( Fig. 2 View FIGURE 2 L) ................................................ 5

4’) Eyes reduced, 6–8 facets across lateral surface ( Fig. 4 View FIGURE 4 B) ......................................... 6

5) Setae on elytra arranged in tufts on interstices ( Fig. 2 View FIGURE 2 E); tarsal lobes well developed, distal end of 3rd tarsomere extending to distal margin of 4th ( Fig. 2 View FIGURE 2 J). Length 4.8mm, endemic to Kauai ............................................................... A . involucer Scott

5’) Setae on elytra not arranged in tufts; tarsal lobes reduced, distal end of 3rd tarsomere not extending to distal margin of 4th ( Figs. 4 View FIGURE 4 F, 4M). Length 4.0mm, endemic to East Maui ............................................................................................. A . conditus sp. nov.

6) Elytral margin evenly curved to hind angle ( Fig. 4 View FIGURE 4 A); pronotal punctures shallow, irregular, obsolete at lateral margin, intervals granular. Length 4.7mm, endemic to Oahu ............................................................................................ A . abstrusus sp. nov.

6’) Elytral margin inflexed before hind angle ( Fig. 4 View FIGURE 4 I); pronotal punctures definite, crowded, intervals with fine linear microsculpture. Endemic to Molokai. Length 4.7mm .................................................................................... A . ganeademus sp. nov.

7) Wings reduced, shorter than elytron, expanded and truncate apically. Endemic to East Maui. Length 4.9–6.7mm .................................................... A . subalatus (Scott)

7’) Wings full, longer than elytron, attenuate at apex. Length 4.5–6.1mm ..................... 8

8) Pronotum with anterior angle acute, anterior margin evenly concave ( Fig. 7 View FIGURE 7. A. A C), width of elytron and pronotum subequal. Oahu and Hawaii Island. Length 5.2–6.1mm ..................................................................................... A . guttatus (Sharp)

8’) Pronotum with anterior angle rounded, anterior margin convex laterally ( Fig. 7A View FIGURE 7. A. A ), pronotum narrower than body width at middle of elytra........................................... 9

9) Background color nearly black, pale areas limited to base and lateral margin of elytron. Lateral margin of elytron explanate, 3– 5 X width of marginal bead, nearly straight in dorsal view ( Fig. 7 View FIGURE 7. A. A D). East Maui, Molokai, Hawaii Island. Length 4.5–5.6mm ....................................................................................... A . atratus (Scott)

9’) Background color orange-red to dark brown, pale areas often along suture and apex of elytron. Lateral margin of elytron narrow, 2X width of marginal bead, broadly rounded in dorsal view ( Fig. 7 View FIGURE 7. A. A E). Length 4.6–6.0mm. ........................................... 10

10) Pronotum strongly transverse, Width/Length 1.7, finely lined microsculpture, surface shining; anal sclerite with sides at apex convergent, straight, apex subacute ( Fig. 7 View FIGURE 7. A. A G). Endemic to Kauai. Length 5.3mm ............................. A . kauaiensis (Scott)

10’) Pronotum not strongly transverse, Width/Length 1.55, granular microsculpture, surface not shining; anal sclerite with apically convergent sides, concave, acuminate ( Fig. 7 View FIGURE 7. A. A F). Endemic to East Maui and Hawaii Island. Length 4.6–6mm .................. 11

11) Color brown to dark brown. Endemic to Hawaii Island. Length 4.6–5.5mm ............. ...................................................................................................... A . sordidus (Sharp)

11’) Color pale red. Endemic to East Maui. Length 6mm ............... A . expers (Blackburn) Apetasimus Sharp