Phaeoblastophora peckii corresponds to an asexual form and it is not clear whether a corresponding sexual morph is known. It likely has a wide distribution, but taxonomic revision is needed to confirm which records can be rightfully attributed to this species. There are at most only three complete records (including date) from the last 50 years, so it is difficult to establish current distribution and population size. The species is assessed as Data Deficient (DD).

Partridge and Morgan-Jones (2002) established Phaeoblastophora peckii in place of Alysidium resinae var. microsporum, Torulosa peckii and Torulosa ramosa Peck (Nom. illegit.) based on its morphological characteristics. However, Species Fungorum (2023) does not list Alysidium resinae var. microsporum as a synonym of Phaeoblastophora peckii, but rather of Alysidium resinae.
Since the only other previous Phaeoblastophora species (P. resinae) is currently accepted as Alysidium resinae, Phaeoblastophora is now a monotypic genus according to Species Fungorum (2023).
It is not clear if a sexual morph form for this species is known.

Phaeoblastophora peckii has wide distribution. It was originally described for the United States and more recently for China (Wang et al. 2016) and GBIF.org (2023) includes records for its synonym Alysidium resinae var. microsporum from Sweden, Canada, United Kingdom, and India.

GBIF.org does not include any records for Phaeoblastophora peckii, but does for Alysidium resinae var. microsporum, which can be used to help establish population size for P. peckii since they were determined as synonymous. However, most have no collection date, except for one record from the United Kingdom from 1900, one from Canada in 1965 and one record from Sweden in 2001. The establishment of Phaeoblastophora peckii was based on records for Torulosa ramosa Peck from before 1879 and a record from 1978 (Partridge and Morgan-Jones, 2002), and a more recent record from 2014 was also published for China (Wang et al. 2016).
Altogether, there are only 3 complete records from the last 50 years (1978 in USA, 2001 in Sweden and 2014 in China) but its wide distribution suggests there may be a higher number of unknown sites. Nevertheless, without more recent observations and confirmation that all Alysidium resinae var. microsporum records can be attributed to Phaeoblastophora peckii it is difficult establish population size.

Anamorph. Grows on dead wood.

Unknown.

Research into substrate preferences and further sampling is needed to establish population size and distribution limits. Taxonomic revision is also important to confirm its placement in a monotypic genus and clarify which records should be attributed to this species.