There are at least three Arachnopeziza araneosa-like species in New Zealand. All of the New Zealand species match A. araneosa ecologically, forming apothecia on large pieces of partly rotten wood. All have small, sessile, whitish to pale yellow apothecia held on a subiculum of whitish hyphae. The genetically distinct groups differ in ascospore size, in and appreance of the hairs.
Whether any of them match the Tasmanian type specimen of A. araneosa is not known. I have DNA sequences from only one Australian specimen (AU09-47, PDD 111524), an undescribed species with much larger ascospores than A. araneosa (based on the description in Spooner 1987).
NZ Group 1 [D693/PDD 59117; D781/PDD 59980; D386/PDD 55510; D1599/PDD 74085; D997/PDD 69076] Ascospores 30-58 x 3.5-4.5 µm, average 43.9 x 3.7 µm, 5-7 septate, septa form early are are well defined. Hairs broad, more or less cylindric, often constructed at septa, about 49-97 x 7.5-18 (avge 74 x 9.8 um) The spores are about the right size and have the right number of septa for A. araneosa based on Spooner’s description, but the hairs differ in shape to those illustrated by Spooner.
NZ Group 2 [D955/PDD 105290] Compared with Group 1 the spores are longer, 70-85 x 3.5-4.5, average about 77 x 4 µm and the septa form late in development and are poorly defined. AU09-47 has very similar spores (60-90 x 3.5.5, avge 74.4 x 4.2 µm, and again with poorly defined late-forming septa). The hairs are quite regular, tapering toward apex but with apical cell slightly swollen, similar to Spooner description of A. araneosa.
NZ Group 3 [D2154/PDD 105289] Ascospores intermediate in size between the other two groups, septa develop early and are well defined, 48-72 x 3.5-4.5, average 61.6 x 3.9 µm. The hairs are short and broad, 33-66 x 4-8.5, avge 49.2 x 6.3 µm.

See Manaaki Whenua datastore https://doi.org/10.7931/tdhv-aj12, and 'Arachnopeziza araneosa and related species in NZ'.