how to differentiate L97, L282, L65, & Pseudo. sp 'Alenquer

[samoht]

Hi, need some advice on sexing L97.

I have 6pcs of L97 which i have acquired to try breeding them.
However, I just simply could not differentiate their gender

will looking at its head size, pectoral fins and vent be able to tell the sex?

here are pic of some of them


another pc


here's a third pc


thanks for reading

[MatsP]

If they are mature and well fed, put them in a light-coloured container and photo from above. It should be quite easy to tell the rounder form of the females from the slimmer males.

--
Mats

[Cattleya]

Hi
i think your L97 => Pseudacanthicus sp. "Alenquer" http://www.l-welse.com/reviewpost/showp ... 402/cat/41
Udo

[samoht]

Hi
i think your L97 => Pseudacanthicus sp. "Alenquer" http://www.l-welse.com/reviewpost/showp ... 402/cat/41
Udo

pseuda sp Alenquer? these were bought as L97 from hobbyist, who has bought from fish shop. they are labeled as L97.

so are pseuda sp Alenquer more related to L185? L343? pardon me but are L185/ L343 collected from Alenquer to start with? i compare with these because some of them does have patterns that resembles L185 or L343.

thanks

[samoht]

here are some more pictures of the others

this is another view of the third pc shown in post #1


this pc is 11in


here's a 5in


wonder what is the different between L97, L282 & this pseuda sp Alenquer?

[blueblue]

you may judge from their sex organs.

[Cattleya]

wonder what is the different between L97, L282 & this pseuda sp Alenquer

L97= smaler and black wit wite spots, from Rio Tapajos = http://www.l-welse.com/reviewpost/showp ... 09/cat/all
L282 = much biger , from Venezuela, http://www.planetcatfish.com/catelog/sp ... ies_id=639
sp Alenquer= , biger , from area of Alenquer, http://www.l-welse.com/reviewpost/showp ... 02/cat/all
sp . Alenquer = No L-nuber now, but comming son

my L97
the Boss is about 20cm
the femals about 15cm only
excuse my bad bad English
Udo

[samoht]

wonder what is the different between L97, L282 & this pseuda sp Alenquer

L97= smaler and black wit wite spots, from Rio Tapajos = http://www.l-welse.com/reviewpost/showp ... 09/cat/all
L282 = much biger , from Venezuela, http://www.planetcatfish.com/catelog/sp ... ies_id=639
sp Alenquer= , biger , from area of Alenquer, http://www.l-welse.com/reviewpost/showp ... 02/cat/all
sp . Alenquer = No L-nuber now, but comming son
Udo

thanks for replying
so L97 is black - i think mine are not then since they are not black but brown with black patterns on body.

the only difference between L97 & L282 is their size?
does this mean differentiating them when they are juvenile would be very difficult.
any other ways to tell the difference, e.g. L282 have gold spots instead of white?
are the teeth structure of L97 & L282 difference too?

sorry for asking so many questions , i am now very confused and really keen to learn more

[Cattleya]

HI

thanks for replying
so L97 is black - i think mine are not then since they are not black but brown with black patterns on body.

i am not shure, but i think yours ar sp. Alenquer

the only difference between L97 & L282 is their size?

and div spots (i dont have L282, )

does this mean differentiating them when they are juvenile would be very difficult.

shure

other ways to tell the difference, e.g. L282 have gold spots instead of white?

i think so

are the teeth structure of L97 & L282 difference too?

i dont no =>i dont have L282. But i think the teeth structure its the same. Same teeth structure because, both are Pseudacanthicus.

My L97 are smal, dark black, with white spots.
Your Cactus are Big, brown green grey , with white-grey-brown spots
==> certainly not l97

Udo

[hotchiliz]

wonder what is the different between L97, L282 & this pseuda sp Alenquer

L97= smaler and black wit wite spots, from Rio Tapajos = http://www.l-welse.com/reviewpost/showp ... 09/cat/all
L282 = much biger , from Venezuela, http://www.planetcatfish.com/catelog/sp ... ies_id=639
sp Alenquer= , biger , from area of Alenquer, http://www.l-welse.com/reviewpost/showp ... 02/cat/all
sp . Alenquer = No L-nuber now, but comming son

excuse my bad bad English
Udo

When i saw the pictures of Alenquer, it reminds me of Mustang cactus, L65, by its vertical spots on the tail as well as its soon-to-fade spots. Is there any physical difference between these two??

As Alenquer was not far from Tapajos and Santarem, could what Samoht had got them as a containment inside a L97 shipment?

Anyone wished to share on the difference on L65, L97 and this Alenquer?
As it was my first time knowing of this new species, all along, i always thought that there are alot of confusion between L65 and L97.
L65, to me is that, it's spots will faded completely when they turn adulthood and the "verticle spots" markings on the tail, tells them apart from the rest.
L97 share close similarities as L282. However, 97 has white spots while 282 has a "mustard yellow" spottings. L97 have their spots faded when they approached adult. Either their spots becomes smaller or irregular, that turns to have a "worm-line" pattern. 282 still retains its spots throughout.

In fact, i have not seen anything larger than a 8inch 282 being imported into Singapore. So there isn't any much comparison with a L97 of 10inch being imported before. So, if anyone who have been keeping them, share about their differences.

[Cattleya]

Hi
Fact
L97 from Rio Tapajos
L65 from Rio Tocantins
L282 from Venezuela (?)
sp. "Alenquer" from Alenquer

differently River =differently L-Number
until Mr.Armbruster put al to Leporcanthicus or Peckoltia
consider, L46 L400 L66 L333 L399 L... are from the same river and have an own L-number .
lg Udo

[samoht]

here are some pics of these fishes taken from the top

this pc about 7in


this pc 11in


last pc which i managed to snap, also 11in

[samoht]

another pc which i was unable to catch it, this pc is humongous at 12in, very massive



comparing with this pc, there seems to be some resemblance

http://www.planetcatfish.com/catelog/im ... ge_id=7889

[Cristoffer Forssander]

here are some pics of these fishes taken from the top

this pc about 7in


this pc 11in


last pc which i managed to snap, also 11in

Perhaps the first one is a female but they all seems to be males to me! But I'm not so sure about this!

I would like sideshots on the dorsal fin cause you also can tell the gender by looking at the shape on the dorsal fin!
I've don'e this with some help from my teacher Udo. And from what I've seen in other Pseudacanthicus, other species display the same differences in the dorsal fin!

Regards
Cristoffer

[hotchiliz]

Hi
Fact
L97 from Rio Tapajos
L65 from Rio Tocantins
L282 from Venezuela (?)
sp. "Alenquer" from Alenquer

differently River =differently L-Number
until Mr.Armbruster put al to Leporcanthicus or Peckoltia
consider, L46 L400 L66 L333 L399 L... are from the same river and have an own L-number .
lg Udo

Yes, i agree with you on the locality of the species.
However, over here in Singapore, although it is one of the main ornament fish exporter countries in Asia, we have no idea where these fishes came from, apart from being labeled as "from brazil".
So our only chance of having a proper identification of the fishes are through their physical characteristics, through any form of publications. We does not have the luxury of having lots of imports on them. So the chances of looking at a large specimens is relatively low.
Sometimes,our importers do have a shipment of mixed L97 and L282 coming together. That is why, it is even more difficult for us to proper identify them. And such knowledge of comparison between different looks-alike species is so important which we could not find a possible answer either through publications or the web.

I remember 3 years ago, we came in a pseudacanthicus from peru. It was labelled as a peru pseudacanthicus. At that time, i do not believe it was a new species as it was neither on planetcatfish nor on aqualog. It was not on any other publication we can look for. We were thinking if it is a "marketing gimmick" for a L65 or something like what samoht have posted. Until recently this year, when Hongkong came a shipment on them from peru, then we realised that it is true and this Peru pseudacanthicus did really exist at that time.

Thus, such knowledge of close comparison can helps us to understand this hobby better.