In the wild, D. lamasi use hollow bamboo stalks for raising tadpoles, but in captivity, they will use either bromes or film canisters. While they are egg feeders and female will deposit eggs for the tadpoles, they are more omnivorous than imitators and require some algae and detritus for grazing. So you might supplement a bit with some finely crushed tadpole bits containing spirula or other algaes, or even crushed fish flake. Just a little bit--don't over-do it. Mount the film canisters at a slight angle on the background, and keep them filled with water by misting and allowing this to overflow a bit to keep it fresh. Like imitators, they will also eat extraneous fruit flies that fall in the water. This is just information from my own research, no first hand experience here, but here is what I DON'T know for sure, but which might be extrapolated from experience with imitators:
The lamasi will lay 2 or perhaps more eggs and guard them. Then one of them (whether the male or female in this case, I do not know, but with imitators, it's the male) will back up onto the eggs and a tad or more will crawl onto his back. He will carry it and deposit it in the chosen nursery water, either a brome axil or canister. The smart imitator Dads deposit only one tadpole per axil or canister, as imitator tadpoles are cannibalistic. If two or more end up in the same place, none will survive, as they will tear each other up. (I could not find whether lamasi are cannibalistic or not, but for safety sake, assume so.) The male will then guard the tads and call the female to feed them with an infertile egg periodically.
D. lamasi are more omnivorous as tads than imitators, and need some algae and detritus to graze upon along with the eggs. So you could probably crush some spirula or other algae source and sprinkle a tiny bit of it in the cup occasionally. They will also attack and devour fruit flies and springtails, etc. that fall into the cup. I've seen one of my imitator tads rip a tiny snail right out of its shell and eat it.
The odd man out in your tank may be either sex, but with imitators, it's usually a male just staying the hell out of the way, while the alpha male does all the work and has all the fun. (In my experience, female imitators always seem to compete for the same guy, ignoring the nerd in the corner.) I've found the female imitators to be much more competitive and aggressive than males, and will even fight over who gets to feed the tadpoles if there's more than one female, whether or not it belongs to her. These fights look very fierce, but no one seems to get hurt or particularly stressed out or intimidated in the long run. They are very athletic ladies, and the real mom usually wins, at least temporarily. The Dad just watches, sitting by the tadpole like a cautious Mormon polygamist. Whether this pertains to D. lamasi, I really don't know. All you can do is provide the things they need and then sit back and enjoy the show.
Other people have reported different scenarios with imitators, so these are just what I've observed. I can't find any source for "enjoying the show" with lamasi, only remarks that they are rather more skittish and shy. Half the fun is letting them do their own thing and reporting your own voyeuristic impressions. If letting them raise their own doesn't work, you can always pull the eggs and do it yourself the next time. It may take them several tries to get it right, so be patient.
Above all, please keep us informed about your experiences.
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Patty
Pahsimeroi, Idaho
D. auratus blue
D. galactonotus pumpkin orange splash back
D. imitator
D. leucomelas
D. pumilio Bastimentos
D. fantasticus
P. terribilis mint and organe
D. reticulatus
D. castaneoticus
D. azureus
P vittatus
P. lugubris
