I have seen where common bristlenose were labeled L144
a, not L144....there's a strain difference. To say all bristlenose are L144 is like saying all tetras are just tetras regardless of difference in location found, size difference, body shape, body coloring, living requirements, etc. But we give each tetra a name. We do the same for many species of ancistrus. While all bristlenose are ancistrus, they are not all L144. Common bristlenose either piebald, albino or brown is categorized as
Ancistrus cf. cirrhosus formerly ancistrus species 3. This includes both long fin and short fin varieties.
If you take a look at the link TwoTank gave you you will see many different colors and names and some have very, very specific living requirements quite different than the common ancistrus cirrhosus. Some are black water species only. Some are 3", some are almost 8". A variety of patterns as well. So, in my opnion, you need to know what kind of bristlenose you have in order to advertise it properly.
The number L144 is for an xanthoristic bristlenose referred to only to the Black Eyed Yellow bristlenose also known as the Blue Eyed albino ancristrus which I am raising. They are yellow with dark eyes and not albinos like the common albinos with red eyes. And their markings are not the same. There is also a longfin and a short fin variety and they cost more than double the price of commons for the short fin variety, and the long fins are 4 to 5 times more expensive than the common long fin albino.
http://www.planetcatfish.com/catelog/species.php?species_id=905
New strains of ancistrus are still being discovered and imported from South America and have no connection whatsoever with the common bristlenose raised by many hobbyists in the US today. I have already spawned and raised one of the newer species from peru, sp. Pucallpa (still not given an L number yet)
http://www.planetcatfish.com/catelog/species.php?species=ancistrus+sp`pucallpa`&species_id=2128. This particular species of ancistrus came from warmer waters than most other ancistrus and thus turned out to be a better bristlenose for the discus keepers tanks than common albinos. Seems the higher temps shorten the life span of the common albinos. Lots of reading and research to do.