We present H I spectral line and optical broadband images of the nearby low surface brightness dwarf galaxy KDG 215 .
The HI images , acquired with the Karl G. Jansky Very Large Array ( VLA The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities , Inc . ) , reveal a dispersion dominated ISM with only weak signatures of coherent rotation .
The HI gas reaches a peak mass surface density of 6 M _ { \odot } pc ^ { -2 } at the location of the peak surface brightness in the optical and the UV .
Although KDG 215 is gas-rich , the H \alpha non-detection implies a very low current massive star formation rate .
In order to investigate the recent evolution of this system , we have derived the recent and lifetime star formation histories from archival Hubble Space Telescope images .
The recent star formation history shows a peak star formation rate \sim 1 Gyr ago , followed by a decreasing star formation rate to the present day quiescent state .
The cumulative star formation history indicates that a significant fraction of the stellar mass assembly in KDG 215 has occurred within the last 1.25 Gyr .
KDG 215 is one of only a few known galaxies which demonstrates such a delayed star formation history .
While the ancient stellar population ( predominantly red giants ) is prominent , the look-back time by which 50 % of the mass of all stars ever formed had been created is among the youngest of any known galaxy .