We present a sample of eight extended X-ray sources detected in the wide-field ( \sim 2.3 { deg } ^ { 2 } ) , bright ( 2-10 ksec ) XMM-Newton /2dF survey , reaching a flux limit of \sim 2 \times 10 ^ { -14 } erg s ^ { -1 } cm ^ { -2 } .
Of these , seven are identified as secure X-ray clusters in the soft 0.3-2 keV band using a standard wavelet algorithm on either the PN or the MOS images .
Spectroscopic or photometric redshifts are available for five clusters , spanning a range between 0.12 and 0.68 .
The X-ray spectral fittings show temperatures between 1 and 4.6 keV , characteristic of poor clusters and groups of galaxies .
We derive for the first time the XMM-Newton cluster number count \log N - \log S distribution albeit with poor statistics .
Both the \log N - \log S and the Luminosity-Temperature relation are in good agreement with previous ROSAT results .