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Synapsid

69 posts1 sourceWiki updated 5/1/2026
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Featured Images

loona (helluva boss) from helluva boss by puppybfloona (helluva boss) from helluva boss by phenyanyanyatylus cairn fan arttylus cairn fan art

About Synapsid

Synapsida is a clade of animals consisting of mammals and their extinct relatives. This tag refers specifically to prehistoric non-mammalian synapsids such as Lystrosaurus and Inostrancevia.

Character tags

loona (helluva boss)male loonatylus cairn

Copyright tags

helluva bossmythology

Artist tags

puppybfphenyanyanyakiwa flowcatcrystal-for-ever

General tags

1boyanthroanusassbacksackballsballsackbig assbig buttblushcanidcanid demoncaninecanisclothingdark grey furdemondog boydomestic dogfemboyfurgenitalsgirlyhairheartheartshearts around headhellhoundlegwearlooking at viewerlooking backmalemale focusmale onlymalesubmammal

Synapsid Gallery

4 visible posts on page 2

loona (helluva boss) from helluva boss by puppybf
loona (helluva boss)
helluva boss · by puppybf · rule34.xxx
loona (helluva boss) from helluva boss by phenyanyanya
loona (helluva boss)
helluva boss · by phenyanyanya · rule34.xxx
tylus cairn fan art
tylus cairn
by kiwa flowcat · rule34.xxx
tylus cairn fan art
tylus cairn
by crystal-for-ever · rule34.xxx
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