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abstract: 'Scorpius-Centaurus is the nearest OB association and its hundreds of members were divided into sub-groups, including Lower Centaurus Crux. Here we [study the dynamics of the Lower Centaurus Crux area]{}. We report the [[revelation of a large moving group containing [more than]{} 1800]{}]{} intermediate- and low-mass young stellar objects and brown dwarfs, that escaped identification until [[*Gaia*]{}]{} DR2 allowed to perform a kinematic and photometric selection. [We investigate the stellar and substellar content of this moving group using the [[*Gaia*]{}]{} DR2 astrometric and [photometric]{} measurements. ]{} [The median distance of the members is 114.5 pc and 80% lie between 102 and 135 pc from the Sun.]{} Our new members cover a mass range of 5M$_\odot$ to 0.02M$_\odot$, and add up to a total mass of about 700M$_\odot$. The present-day mass function follows a log-normal law with m$_c$ = 0.22 [M$_\odot$]{} and $\sigma$ = 0.64. We find more than 200 brown dwarfs in our sample. The star formation rate had its maximum of $8\times10^{-5}\rm M_\odot yr^{-1}$ at about 9Myr ago, We grouped the new members in four denser subgroups, which have increasing age from 7 to 10Myr, surrounded by “free-floating" young stars with mixed ages. [[Our isochronal ages, now 