1	Pronotum divided into two clear sections by a narrow “waist”, at least anterior section bearing a large elongate horn-like spine laterally [Afrotropical] (Fig. 24; also see Kaszab 1976)	Spinolagriella
–	Pronotum not divided as above	2
2	Eyes completely divided [Tropical America] (Fig. 26)	Xanthicles
–	Eyes not divided, typically reniform	3
3	At least some femora with teeth	4
–	All femora without teeth	5
4	Middle and hind femora with large tooth, pronotum more or less explanate laterally, dorsum reddish or patterned yellow and black, not tuberculate [Afrotropical] (Fig. 27)	Lyprochelyda
–	Profemur, sometimes other femora armed in males, surface metallic, tuberculate [tropical America] (Fig. 23)	Phymatestes
5	Anterior lateral angles of pronotum greatly extended forming posterior angled arcs with anterior margins with spinose extensions [tropical America] (Fig. 28; also see Johnston et al. 2022)	Ancylopoma
–	Anterior lateral angles of pronotum not greatly extended forming posterior angled arcs	6
6	Tarsal formula 5-5-4. Pronotum with lateral margin slightly concave before hind angles, hind angles variable	7
–	Tarsal formula 4-4-4. Pronotum with lateral angles evenly rounded without concave aspect near hind angles, hind angles obtuse, never spinose [tropical America] (see Kaszab 1973)	Myrmecopeltoides
7	Basal hind tarsomere distinctly longer than length of tarsomeres 2+4 or nearly as long as the other tarsomeres together	8
–	Basal hind tarsomere equal or subequal in size to terminal tarsomere	9
8	Lateral margin of elytra near humeral angle with setae placed in the marginal carina, rendering the margin interrupted and the outline variably serrate, if these serrations weak, punctures on elytral disc and apex always confused; elytral disc occasionally with punctures in distinct linear series (striate), but in those cases the lateral elytral margin distinctly serrate; widespread including Tropical America] (Figs 30–45)	Anaedus
–	Lateral margin of elytra with setae dorsad the lateral carina, not interrupting it; elytral disc and apex with punctures in linear series [tropical America] (Figs 21, 45)	Aemymone
9	Lateral margins of pronotum at most with one or two obtuse angles, slightly explanate in some species, not strongly explanate on anterior section, surface usually smooth but some species with small tubercles. Elytra striate to costate, some species with costae forming elongate or short tubercles, without large tubercles. Lateral aspect of elytra smooth, not strongly dentate [tropical America] (Fig. 22)	Goniadera
–	Lateral margins of pronotum and elytra strongly dentate, pronotum strongly explanate on anterior two-thirds. Both pronotum and elytra with numerous large tubercles [tropical America] (Fig. 25)	Opatresthes