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Mystery Nannostomus
February 15, 2009
9:56 pm
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Matt
Málaga, Spain
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I was going to add this pic to the knowledge base as Nannostomus beckfordi but looking at it again I'm not so sure. Am I having a blonde moment or not? /unsure.gif" style="vertical-align:middle" emoid=":unsure:" border="0" alt="unsure.gif" />

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Cake or death?
February 16, 2009
1:27 am
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Mark Duffill
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Thats a nice one Matt

Here it is over at Aquaticquotient N.beckfordi

February 16, 2009
12:05 pm
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mickthefish
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every thing fits for a beckfordi exceptthe red stripe and the red top eye.
possibly a location caught or if farmbred a slight mutation.

mick

February 16, 2009
1:10 pm
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Mark Duffill
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If I remeber rightly Nannostomus nitidus has a slight orange stripe above the black stripe but I dont think it is as pronuonced as that.

February 16, 2009
1:26 pm
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mickthefish
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Bolton mu has a shoal of nitidus and i'm sure that isn't the same fish.

mick

February 16, 2009
7:44 pm
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Matt
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Yup that's it Mark Chor Kiat Yeo who took the pic has kindly donated a whole series of different species for us. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" /> I'm still not sure it's beckfordi although it's something real close...

Cake or death?
February 16, 2009
8:45 pm
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ulster exile
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Mine are like that too though... I wasn't focusing on the pencilfish, but you can clearly see the red over the eye

IMG_1062.jpgImage Enlarger

Again, not a great pic, but you can see the glint of the red in the eyes of those behind the main character here.

IMG_0755.jpgImage Enlarger

The one thing I will say about these is that the red strip above the black easily disappears if the fish are stressed. I only notice it coming out (like the thickness of the black stripe) when they are in tip top condition.

February 17, 2009
12:36 am
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Matt
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I've kept what I bought as N. beckfordi and they never had such a defined red line as in CK or Chrissy's pics even when in super-display mode. So back to (guru) Mick's original points then. /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" /> Is it a locality or a mutant? Chrissy any idea if the shop you bought them from stock wild fish?

Cake or death?
February 17, 2009
11:25 am
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Mark Duffill
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I would say locality variant as I think if they were mutant or farm bred their markings/colours would be weakened.

February 17, 2009
1:48 pm
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ulster exile
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QUOTE (Matt @ Feb 17 2009, 12:19 AM) < {POST_SNAPBACK}>
Chrissy any idea if the shop you bought them from stock wild fish?

Sorry Matt, I've no idea!

February 18, 2009
12:54 am
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Matt
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QUOTE (Mad Duff @ Feb 17 2009, 12:08 PM) < {POST_SNAPBACK}>
I would say locality variant as I think if they were mutant or farm bred their markings/colours would be weakened.

I was thinking the same; their markings are really well-defined. *strokes chin* Grr we need more smilies! /laugh.gif" style="vertical-align:middle" emoid="Laugh" border="0" alt="laugh.gif" />

Cake or death?
March 8, 2009
8:18 pm
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Byron Hosking
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I would think this is a form of N. beckfordi. I have a photo in a late 1990's Aqualog update that is very close to your fish, and it is labelled as N. aripirangensis [Meinken 1931] a probable synonym for N. beckfordi. Gery [1977] says that N. aripirangensis may be a sibling species or subspecies of N. beckfordi. Weitzman & Cobb did a revision of the Nannostomini in 1975 that I have never come across; if anyone has access to it, it might have more information.

I have a small shoal of N. beckfordi and there is no indication of a red line on the females but there is on the males, although the brown above the black lateral stripe is so dark the red is quite difficult to see on a couple of them.

Byron.

Byron Hosking, BMus, MA Vancouver, BC Canada
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