Amblydoras or Merodoras

[Peixes]

Hi, I've got this little guy for almost 9 months, and as far as I can tell it is still the same size, around 4 or 5 cm. I thougt it was a juvenile Amblydoras, based on the caudal fin. But yesterday I saw a

Merodoras nheco

, that has the same caudal fin and SL 54mm, so now I'm not so sure. Any thoughts?

This is the species description:

"Merodoras nheco, new species, is distinguished from other doradids by the unique combination of the following characteristics: 1) tips of retrorse spines on the midlateral scutes ventrally oriented in adults; 2) incomplete lateral line, with only a few midlateral scutes anteriorly; 3) pectoral girdle entirely exposed ventrally, with the opening of the arrector ventralis inferior reduced to a small fossae on the anterior edge of the coracoid; 4) caudal fin truncate; 5) dorsal-fin spine smooth, without serrae on both faces; 5) lacrimal serrated; 6) lateral ethmoid serrated"
Merodoras nheco, new genus and species from Rio Paraguay basin, Brazil
(Siluriformes, Doradidae), and nomination of the new subfamily Astrodoradinae
HORÁCIO HIGUCHI1, JOSÉ L. O. BIRINDELLI, LEANDRO M. SOUSA & HERALDO A. BRITSKI

[Jools]

Lovely fish. It does not look like

Amblydoras

that I am familiar with but I think @The.Dark.One is the best to comment on these.

Jools