The relative fraction of obscured galaxies at z>4 compared to lower redshifts remains highly uncertain as accurate bookkeeping of the dust-obscured component proves difficult. We address this shortcoming with SCUBADive, a compilation of the JWST counterparts of (sub-) millimeter galaxies in COSMOS-Web, in order to further analyze the distribution and properties of massive dust-obscured galaxies at early times. In this paper, we present a subset of SCUBADive, focusing on 60 ``dark'' galaxies that dropout at 1. 5. Motivated by JWST observations of AzTECC71, a far-infrared bright F150W-dropout with z ₇₎ₓ=5. 7^+0. 8-₀. ₇, we complete a systematic search of F150W-dropouts with SCUBA-2 and ALMA detections to find more candidate high redshift dusty galaxies. Within our subsample, 16 are most similar to AzTECC71 due to fainter F444W magnitudes (>24\, mag) and lack of counterparts in COSMOS2020. Despite high star formation rates (SFR=450^+920-₃₂₀\, \, yr^-1) and large stellar masses (log₁₀ () =11. 2^+0. 5-₀. ₆\, ) on average, these galaxies may not be particularly extreme for their presumed epochs according to offsets from the main sequence. We find that heavily obscured galaxies, which would be missed by pre-JWST optical imaging campaigns, comprise 20\% of galaxies across mass bins and potentially contribute up to 60\% at the very high mass end (log₁₀ (/) >11. 5) of the z>4 stellar mass function.
Manning et al. (Wed,) studied this question.