Irenaeus Fabula 11. De Lupo et Vulpe

I'm embarking on a new Latin fable project here at the Latin Via Fables blog: digitizing the 300 fables in the Mithologica sacro-profana, seu florilegium fabularum by P. Irenaeus, published in 1666, which has recently become available at GoogleBooks. For a complete index of the fables in the book, with links to the fables I've digitized so far, check out the Aesopus wiki page at Aesopus.PBwiki.com.

Today's fable is De Lupo et Vulpe, the story of the petition of the fox and the wolf to the great god Jupiter. This is not an Aesop's fable that I have seen in another source, although it uses very familiar motifs. Does anybody recognize this fable from another source?

To make reading the fable easier, I've provided a segmented version of the story below.

Convenerant Lupus et Vulpes adire Iovem, ut ab eo peterent ambo quod sibi quisque deesse existimabat: Lupus rapax, calliditatem Vulpis; Vulpes callida, Lupi vires et impetum; sic fore, ut singuli abundantius praedas facerent. Respuit crudelium animalium vota Iupiter, utpote iniusta et iniuria proximis suis; ab origine mundi singulis animantibus largissime data munera, non uni omnia, respondit.

Convenerant Lupus et Vulpes
adire Iovem,
ut ab eo peterent ambo
quod
sibi quisque deesse existimabat:
Lupus rapax,
calliditatem Vulpis;
Vulpes callida,
Lupi vires et impetum;
sic fore,
ut singuli
abundantius praedas facerent.
Respuit
crudelium animalium vota
Iupiter,
utpote iniusta et iniuria
proximis suis;
ab origine mundi
singulis animantibus
largissime data munera,
non uni omnia,
respondit.

Here's an illustration for the fable (image source), showing a statue of Jupiter in the Vatican Museum:

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Aesop's Fables in Latin now available at Amazon.com.