| Classification | Hookeriaceae: Callicostella | 
| Harvard University Herbaria Barcode(s) | 00213338 | 
| Type Status | Isotype | 
| Collector | J. A. Steyermark | 
| Collector number | 29473 | 
| Country | Guatemala | 
| State | Zacapa | 
| Geography | North America: Central America (Region): Guatemala: Zacapa | 
| Locality | Sierra de las Minas, trail between Rio Hondo and waterfall, near hydro-electric station | 
| Date Collected | 1939-10-10 | 
| Elevation | 250 - 400 m | 
| Habitat | moist rocky slopes | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/dc6c6329-2576-448f-8280-f5587caf2ebf | 
| Harvard University Herbaria Barcode | 00213338 | 
| Herbarium | FH | 
| Family | Hookeriaceae | 
| Type Status | Isotype | 
| Isotype of | Callicostella vatteri E. B. Bartram | 
| Verified by | B. H. ALlen (MO) | 
| Date Determined | 2007 | 
| Taxon Reference | (for  Callicostella vatteri E. B. Bartram) Bryologist 1946. 49: 118. | 
| Family | Hookeriaceae | 
| Determination | Callicostella merkelii (Hornschuch) Jaeger | 
| Determined by | B. H. Allen (MO) | 
| Date Determined | 2007 | 
| Determination Remarks | [current name] | 
| Family | Hookeriaceae | 
| Determination | Callicostella vatteri E. B. Bartram | 
| Determined by | E. B. Bartram | 
| Determination Remarks | [label name] | 
| Annotation Text | Callicostella glabella Bartr. sp nov. C. vatteri Bartram sp. nov. fide E. B. Bartram | 
| Sex | not determined | 
| Phenology | Sporophyte | 
| Preparation Type | Packet | 
| Preparation Method | Dried |