Black tarantulas with red bums

[campj]

Pamphobeteus petersi, Pamphobeteus affinis nigricolor

 

[Pillenslikker]

Tliltocatl sabulosum

 

[Pyrelitha]

I’m surprised how many peeps listed species the OP already mentioned

I was trying to figure out if those posts were pre or post an edit or something lol

 

[Arachnid Addicted]

A few suggestions, some of them aren't exactly "jet black" and have a "reddish/orangeish/yellowish" abdomen but, there you go:

Acanthoscurria chacoana
Aphonopelma catalina
Aphonopelma peloncillo
Catanduba peruacu
Davus fasciatus
Dugesiella anitahoffmannae
Dugesiella duplex
Ephebopus foliatus
Euathlus sp. "Esmeralda"
Grammostola actaeon (only ling and juvie)
Grammostola iheringi
Hapalotremus marcapata
Harpactira chrysogaster
Hemirrhagus benzaa
Homoeomma chilensis
Homoeomma orellanai
Homoeomma uruguayense
Iridopelma katiae
Iridopelma vanini
Kankuamo marquezi
Lasiodora isabellina
Lasiodora klugi
Lasiodora pleopectra
Lasiodora striatipes
Megaphobema velvetosoma
Pachistopelma rufonigrum
Pamphobeteus antinous (Peru)
Pamphobeteus nigricolor
Pamphobeteus petersi
Pamphobeteus sp. "Cascada"
Pamphobeteus sp. "Manabi"
Plesiopelma longisternale
Psalmopoeus victori
Pterinopelma vitiosum
Sericopelma angustum
Sericopelma generala
Sericopelma rubronitens
Sericopelma sp. "Veraguas"
Sericopelma sp. "El Cope"
Thrixopelma ockerti
Thrixopelma sp. "Cajamarca"
Tliltocatl epicureanus
Tliltocatl kahlenbergi
Tliltocatl sabulosus
Tliltocatl sp. "Tabasco"
Tliltocatl sp. "Tortuguero"
Tliltocatl vagans
Ybyrapora diversipes (Adult)

There are probably many more, specially in Aphonopelma, Pamphobeteus, Sericopelma and Tliltocatl genera. These are the ones I remember now.