Sorry CFC, I just don't agree.
If you refer to Allen (2004), he says specifically of
T. microlepis:
Colour pattern consisting of 4-5 vertically elongate, black bars or triangular saddles interspersed with smaller black spots on upper back; soft portion of dorsal fin with pair of large black spots.
And for
T. jaculatrix:
Dorsal spines 4: series of 4-5 black bars on upper sides.
I think we can both agree on
T. chatareus.
To me, your first two pictures seem to be
T. jaculatrix. They have a few, solid bars running a similar distance down the flanks (i.e., to about the level of the lateral line). Your third picture looks like
T. microlepis. It has the alternating long and short bands (or bars and spots, if you prefer). It also has the two large spots on the soft part of the dorsal; while
T. jaculatrix also has black patches on the dorsal, they run into one or both of the bars, so they aren't really spots as such.
It should be noted that
T. microlepis is said by some authors (e.g. Schaefer) to be more common than
T. jaculatrix in the trade, despited not being a widely used name. Though a freshwater species, it is brackish water as well, and is known to tolerate 1.010 or more. Consequently, many of the supposed
T. jaculatrix kept by aquarists or seen on Google could quite possibly be
T. microlepis. Also, going through some of the Fishbase pictures, there are a lot of
T. jaculatrix there that don't match Allen's description. Since Fishbase is a compilation, whereas Allen is an actual fish taxonomist, I'd tend to favour Allen's interpretation here.
Cheers,
Neale
