Dataset

Selmar Schonland Herbarium Marine Algae Collection

AfrOBIS Open in mapper Explore occurrences

The Selmar Schonland Herbarium (GRA) was formed in 1993 by the amalgamation of the Albany Museum Herbarium (GRA) and the Rhodes University Herbarium (RUH). It is named in honour of the distinguished botanist, Selmar Schonland, who did much to establish botany in South Africa, at Rhodes University and the botanical collections of the Albany Museum in the late 19th century. The herbarium is affiliated to Rhodes University Department of Botany and the Albany Museum. Today the herbarium houses approximately 200 000 plant specimens, making it the 4th largest herbarium in South Africa and the 9th largest on the whole African continent. Taxonomic coverage is broad, and although the majority of specimens are Angiosperms, the herbarium has a very large collection of marine algae based on M.A. Pocock's work. Geographically GRA focuses on the flora of the Eastern Cape Province of South Africa, although collections from most parts of southern Africa are also available, including the Jacot-Guillarmod Lesotho material. The herbarium also has a limited number of specimens from other regions of Africa and other continents. Collections of several historically important collections include Burchell, Ecklon, Flanagan, Galpin, MacOwan, Pappe, Pegler, Rogers, Schlechter, Sim and Zeyher. Thanks to Schonland’s early exchange programmes the herbarium is exceptionally rich in type specimens.

Citation: Griffin, N (2012). Selmar Schonland Hermarium Marine Algae Collection; Dataset published by AfrOBIS; consulted via iOBIS

Published: January 26, 2017 at 13:44

URL: http://ipt.iobis.org/afrobis/resource?r=pocock_seaweeds

Neil Griffin
Rhodes University

Tony Dold
Rhodes University

Ursula von St Ange
AfrOBIS / CSIR

18,214
occurrence records
1,545
taxa
1,303
species

Taxa

Missing and invalid fields

Field Missing Invalid
basisOfRecord 18,214
100.0%
coordinateUncertaintyInMeters 206
1.1%
eventDate 629 17,585
100.0%
maximumDepthInMeters 18,214
100.0%
minimumDepthInMeters 18,214
100.0%
occurrenceStatus 18,214
100.0%
scientificNameID 837 112
5.2%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 18,214
100.0%
ON_LAND 10,045
55.1%
NO_MATCH 707
3.9%
ZERO_COORD 206
1.1%
WORMS_ANNOTATION_RESOLVABLE_LOSS 186
1.0%
WORMS_ANNOTATION_REJECT_AMBIGUOUS 167
0.9%
NO_ACCEPTED_NAME 100
0.5%
WORMS_ANNOTATION_RESOLVABLE 32
0.2%
MARINE_UNSURE 13
0.1%
NOT_MARINE 1
0.0%

Measurement types

DNA derived data