What happened to _tamesnensis_?

[Mike Taylor <mike@indexdata.com>]

I am trying to figure out what happened to the species _tamesnensis_,
erected by Lapparent 1960 to contain material that he thought
pertained to _Rebbachisaurus_ but which he considered camarasaurid.

According to Sereno et al. 1999, it seems that this material is now
considered to be _Jobaria tiguidensis_ -- note 5 of that paper says:

5. Fragmentary sauropod remains from the Tiouraren Formation were
   initially described as a new species, _Rebbachisaurus tamesnensis_
   [A. F. de Lapparent, _Mem. Soc. Geol. France_ 88A, 1 (1960)]. Type
   material, however, was not designated, and no diagnostic features
   were mentioned (3). Lapparent considered the Tiouraren sauropod to
   be a camarasaurid; elsewhere it has been referred to the
   Diplodocidae [J. S.  McIntosh, in _The Dinosauria_ (Univ. of
   California Press, Berkeley, CA, 1990), pp. 345-401].  Etymology:
   _Jobar_, Jobar ( Tamacheck); _ia_, pertaining to (Greek);
   _tiguidi_, Tiguidi ( Tamacheck); _ensis_, from (Latin).  Named
   after the mythical creature "Jobar," to whom local Touregs had
   attributed the exposed bones, and after the Falaise de Tiguidi, a
   cliff near the base of which lie the horizons yielding all of its
   remains.  [...]

(If I am correctly interpreting this rather enigmatic note as meaning
that Lapparent's material is now _Jobaria_, why did Sereno et
al. choose a new specific name instead of using the combination
_Jobaria tamesnensis_?)

But the matter is confused by Upchurch et al. 2004, whose taxonomic
table says of _Nigersaurus taqueti_ Sereno et al. 1999 that this name
is "including _Rebbachisaurus tamesnensis_ Lapparent, 1960a".

So it looks as though "_Rebbachisaurus_" _tamesnensis_ is one of the
two new sauropods named by Sereno et al. 1999, but it's not clear
which.  Any light shed on this situation will be very wecome.

References
----------

Lapparent, Albert F. de, 1960, Les dinosauriens du "Continental
Intercalaire" du Sahara Central: Memoires de la Societe Geologique de
France (Nouvelle Serie), 88A, 56 pages.
    - PDF of translation available at 
        http://ravenel.si.edu/paleo/paleoglot/files/Lapparent_60.pdf

Sereno, Paul C. et al. (1999).  Cretaceous Sauropods from the Sahara
and the Uneven Rate of Skeletal Evolution Among Dinosaurs.  Science,
vol. 282, pp. 1342-1347; 12 November 1999

Upchurch, Paul., Paul. M. Barrett and Peter. Dodson.  2004.
Sauropoda, p. 259-322.  In: D. B. Weishampel, P. Dodson and
H. Osmolska (eds.), The Dinosauria, 2nd edition.  University of
California Press, Berkeley and Los Angeles.

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