Apetasimus
Creators: name: Ewing, Curtis
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Nitidulidae
Apetasimus

description: Key to Apetasimus
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 B, 7C), pronotal setae long, dense, disorganized (Fig. 7A), pronotum depressed and uneven, (guttatus- group) ............................................................................................................... 7
2) Elytra with distinct lateral post-humeral depression, lateral margin narrow (Figs. 5 B, 6J); lobes of tarsomere 3 large (Figs. 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 A, 4I, 4K); lobes of tarsomere 3 small (Figs. 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 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 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 L) ................................................ 5
4’) Eyes reduced, 6–8 facets across lateral surface (Fig. 4 B) ......................................... 6
5) Setae on elytra arranged in tufts on interstices (Fig. 2 E); tarsal lobes well developed, distal end of 3rd tarsomere extending to distal margin of 4th (Fig. 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 F, 4M). Length 4.0mm, endemic to East Maui ............................................................................................. A. conditus sp. nov.
6) Elytral margin evenly curved to hind angle (Fig. 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 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 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), 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 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 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 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 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
description: Published as part of Ewing, Curtis, 2006, Revision of the endemic Hawaiian sap beetle genus Apetasimus Sharp 1908 (Coleoptera: Nitidulidae), pp. 1-30 in Zootaxa 1385 on pages 6-7, DOI: 10.5281/zenodo.175088