Hi,

the first picture seems to be ok, but without knowing the origin it is difficult to be sure in this genus.
All the other pictures look to me like Ancistrus forms from French Guyana that are not identical to Ancistrus temminckii .

https://www.l-welse.com/gallery/files/3/9/9/8/ancistrus ...

Hi,

L 217, L 256 & L 431 are all Paralithoxus.

Cheers,

Hi,

the first picture is no Paralithoxus planquettei , do you know the catching location ?
In the Lithoxini revision of Lujan et al. table 2: "white spots on body: absent", see also here: Paralithoxus planquettei how they do look like.
The pictures from Yann are unidentifiable.

Cheers,

Hi Eric,

in Corantijne river system (Sipaliwini river) we have three Corydoras with similar colour pattern:
- Cordoras filamentosus : lineage 1
- Corydoras sipaliwini : lineage 9 (= CW114)
- Corydoras sp. "CW143" : lineage 8

The picture from Raphael Covain in the link (MHNG 2707.015-SU07-625) was ...

Hi,

Corydoras filamentosus belongs to acutus group, lineage 1.
Similar story as with C. spilurus , the tissue sample used within the framework of the phylogeny of Alexandrou et al. 2010 belonged to the sympatric CW143 which belongs to lineage 8. I have discussed this with Raphael Covain and he ...

Hi,

this species belongs to acutus group, lineage 1.
In the phylogeny of Alexandrou et al. 2010 the tissue samples used belonged to CW138 and not to C. spilurus , that's why this species ended up in the wrong lineage.
I have written an article on this topic in the BSSW report 3-2017 "Über die ...

Hi,

this species belongs to the aeneus group, lineage 7.

Cheers,

Hi,

do you have any information from where those were imported, together with the C. similis ?
I can definitely confirm C. similis and for the others CW063 could be an option. However, the specimen on the original picture has an even smaller caudal spot that is more elongated and a much more ...

Hi,

I would tentatively agree with CW029. I have not kept those myself, so I only know pictures of adult specimen and not too much about variability etc. However, the dark broad stripe going from the eye towards the dorsal fin spine insertion seems to me a good diagnostic feature of this form which ...

Hi,

pictures 6-9 on the species page are in fact Hypostomus spiniger. It's rather outside distribution range for H. commersoni and the last picture with the adult is without any doubt not H. commersoni.

Cheers,

Hi,

on the species page the first 6 pictures are not H. albopunctatus (dorsal spine much too long).
Picture 7 is difficult to judge, picture 8 looks ok.

Cheers,

Hi,

also maximum length needs a correction, afaik it is rather in the range of 25 cm (SL) which is the largest size mentioned in Weber et al. 2012 (based on 158 specimen) and also corresponds to my experience from Suriname.
Since a few years I keep two of them in a 500l tank and those have only ...

Hi Shane,

thanks !
Unfortunately in Weber et al. 2012 the distribution is not defined very precisely, but Venezuela is not listed in Eschmeyer's catalogue but Colombia/Orinoco basin whereas in Weber er al. 2012 they wrote Essequibo:
In the Guianas, Hypostomus plecostomus is found in the coastal ...

Hi,

there some quite doubtful pictures in your data base. As there are lots of similar species from various locations that have been considered to belong to this species and also the populations in Suriname show quite a high variability in pattern it's difficult to identify them with pictures alone ...

Hi,

I don't see anything that would suspect me of this being a hybrid. However, it is most likely C. trilineatus which is commonly sold as C. julii.
The albinos are most likely C. schultzei / C. aeneus, a sharper picture especially of the dorsal fin could confirm this.

Cheers,

Hi,

Corydoras sp. "San Juan" is to my knowledge only a trade name (like deckeri cory in Colombia) not used for only one species or form but a mix.
No one in Iquitos will keep those separated acc. to locations and when those are stressed or juveniles they look probably anyway same. This is one of ...

Hi Daniel,

I can remember that many years back there were in GB some alleged Corydoras bilineatus which might have been descendants of the stock of Joachim Knaack but I don't remember if this was confirmed or not.
If so, I assume Ian or Hans-Georg might know more...

Cheers,

Hi,

I'm quite sure than some if not all picture in the data base are not really Corydoras bilineatus .
They are all additionally labeled as "San Juan" cory which is the trade name for Elegans group corys in Iquitos, Peru. I think it's named after the district San Juan Bautista south-west of Iquitos ...

Hi,

Corydoras bilineatus is a species that you would not expect to find in the pet trade, so I would exclude this species, there are many forms that are much more likely...
I fully agree that this is a really a tough group for ID'ing, I'm leaning towards CW029 without being sure though...

Cheers,

Hi Jools,

I recommend to add the catching location for my picture as well, considering the huge distance to the type locality and Eschmeyer is listing only:
Distribution: Upper Madeira and lower Amazon River basins, Bolivia.

Tapanahony river is a tributary of Marowijne/Maroni river system and ...

Hi,

size info is quite off...

Cheers,

Hi,

you can also use this one of a juvenile (~2,5 cm):


lower Coppename river, Suriname

Cheers,

Hi,

I just saw that you are lacking some Hypostomus pictures in your DB.

https://www.l-welse.com/gallery/files/3/9/9/8/hypostomus_micromaculatus_ks_10383_800.jpg
Hypostomus micromaculatus , Gran Rio, Suriname

https://www.l-welse.com/gallery/files/3/9/9/8/hypostomus_nickerie_3610.jpg ...

Hi,

this first picture from Roland is CW137 (Corantijne drainage), the second one is a true C. coppenamensis.

Cheers,

Hi,

CW151 belongs to lineage 8.4
you can use this picture:


Suriname, Tibiti river (Coppename drainage)

Cheers,

Hi,

bekateen wrote: 29 Oct 2020, 21:11 Yes, but more likely the leopardus relative

Corydoras(ln8sc4) sp(c102)

. The black markings are thicker and farther apart on C102 than on

Corydoras(ln8sc4) leopardus

once they are fully grown.

I fully agree on this.

Cheers,

Hi,

I would tentatively also say C. napoensis and C. elegans.
CW008 looks also similar but to my experience this is unlike many other species in the elegans group quite uniform in colouration and has a more regular striped pattern.

C. nanus can be excluded by minimum 100% .

Cheers,

Hi,

well, I kept C. melanotaenia quite a time ago and the extent to which they show the yellow colour can vary significantly and I do see yellow ventral fins which is not known for "standard" C. aeneus (which is not C. aeneus in sensu stricto) but there are definitely other forms of the aeneus ...

Hi,

it's definitely not C. aeneus in sensu stricto and I would not even call it C. aeneus at all but C. melanotaenia even though the fins are not so bright yellow to exclude all doubts...

There are so many C. aeneus look-a-likes in South America.
One thing is clear, it's a really nice shot of a ...