We've had a lot of different species of pets available throughout the years, but the ones you mentioned are the primary ones that are usually released monthly. Other species are typically released only occasionally during monthly litters, or only during events, and some that are effectively retired and only released in special cases. If you'd like to see all the various types of species we've had you can go into the archives and there is a species dropdown option to sort the pets by that species. For example, heres a link to the archives sorted to Chameleons, which is one of the species we get semi-frequently during monthly litters;
archive/2025/February/ChameleonWe also categorize 'species' as separate from when a particular pet is given lineart edits to look like a different animal. For example one of the store pets from this month is based off of a moth;

but in the archives it is categorized under Guinea Pigs because its actually an edit of the baby Guinea Pig lineart. In particular, you can see how the front and back legs line up;

^This is a very heavy edit and usually edited pets will still have parts from the original lineart, like still having the head from original lineart. If a pet has an entirely new lineart than that is when its able to be categorized as its own species in the archives, its extreme rare for new species to be released now though.
I mention all this because we have had a very large amount of edited pets to look like other species, including various reptiles, insects, etc. I would suggest checking out this thread if you are interested in that, its not complete but makes for an easier reference than looking through the archive one page at a time;
Forum/viewtopic.php?f=20&t=4875161You may also want to check out some of our past summer events, in particular these since they have a higher concentration of pets made to look like other animals;
archive/2012/Beach%20Event/archive/2017/Lost%20City%20Event/archive/2018/Jungle%20Event/archive/2021/Cave%20Event/If you are looking more for insect edits, we tend to get those more often during the Halloween events;
archive/2021/Halloween/Artist-Anoverarchive/2022/Halloween/archive/2024/Halloween/?pageStart=14Thats not an exhaustive list by any means, just the ones that came to mind, but so you get an idea of whats been released in the past. The categorization of species vs edit can be confusing, but one of the main things to know about is just that monthly litters typically have few to no edits (one notable exception being the September staff litter), so if you are looking for more pets edited to look like other pets, you'll mainly find those in events and store pet litters.