Can anyone help me identify 4 of my Pleco?

[Thanusan]

I have 4 plecos( i got it from a friend) no L-number?Pic 1 and 4 look the same
http://i684.photobucket.com/albums/vv201/thanusan/Picture241-1.jpg
http://i684.photobucket.com/albums/vv201/thanusan/Picture246-1.jpg
http://i684.photobucket.com/albums/vv201/thanusan/Picture238-1.jpg
http://i684.photobucket.com/albums/vv201/thanusan/Picture248-1.jpg
sorry for the bad pic
I think it L205 and L271
Shawn

[Thanusan]

hope this pic help
pic 2&3
http://i684.photobucket.com/albums/vv201/thanusan/Picture040.jpg
pic#2
http://i684.photobucket.com/albums/vv201/thanusan/Picture035.jpg
pic 1&4
http://i684.photobucket.com/albums/vv201/thanusan/Picture043-1.jpg
http://i684.photobucket.com/albums/vv201/thanusan/Picture044-1.jpg