I think this is M. gracile, but this still looks odd to me.
Other identifications
Identification
Determined name:
Macromitrium cf. gracile
Determiner:
Fife AJ
Identification date:
1997-12-11 (Verbatim: 11-DEC-1997)
Preferred name:
Macromitrium gracile (Hook.) Schwägr.
Active:
no
Identification type:
Determination
Collection events
Primary collection event
Collection event type:
Field
Standard locality
Location:
Chatham Island, Awatotara Creek area, track to "Tuanui Covenant" near southern limit of Awatotara Creek catchment
Verbatim locality:
Chatham Island, Awatotara Creek area, track to "Tuanui Covenant" near S limit of Awatotara Creek catchment.
Verbatim collector:
Fife AJ 11321
Standardised collector:
Allan J. Fife
Verbatim date:
11-DEC-1997
Start date:
1997-12-11
Land District:
Wellington Land District
Country:
New Zealand
Native lands:
Moriori
Moriori
Ngati Mutunga o Wharekauri
Georeferences:
New Zealand Map Series 260:
CH2 41- 44- (WGS84 -44.048976 -176.605461)
Abundance:
Occasional
Altitudes:
from 200m
Habitat:
6-8 m high Dracophyllum arboreum - Pseudopanax chathamica - Myrsine ?coxii - Corokia macrocarpa - tree fern dominated forest on peat soil over volcanic bedrock.