  Condensed matter systems can host quasiparticle excitations that are
analogues to elementary particles such as Majorana, Weyl, and Dirac fermions.
Recent advances in band theory have expanded the classification of fermions in
crystals, and revealed crystal symmetry-protected electron excitations that
have no high-energy counterparts. Here, using angle-resolved photoemission
spectroscopy, we demonstrate the existence of a triply degenerate point in the
electronic structure of MoP crystal, where the quasiparticle excitations are
beyond the Majorana-Weyl-Dirac classification. Furthermore, we observe pairs of
Weyl points in the bulk electronic structure coexisting with the 'new
fermions', thus introducing a platform for studying the interplay between
different types of fermions.
