Dataset

CAS Invertebrate Zoology (IZ)

OBIS USA Open in mapper Explore occurrences

The electronic catalog of the invertebrate zoology collection at the California Academy of Sciences, San Francisco.

Published: June 29, 2026 at 22:53

First registration: October 14, 2022 at 13:05

License: To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0)

URL: http://ipt.calacademy.org:8080/resource?r=invz

Contacts:

Christina Piotrowski
California Academy of Sciences

277,280
total submitted occurrences
228,175
accepted occurrences
18,410
taxa
14,965
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 136,824
49.3%
decimalLatitude 31,960
11.5%
decimalLongitude 31,965
11.5%
eventDate 28,392 38
10.3%
maximumDepthInMeters 220,171 1
79.4%
minimumDepthInMeters 137,358 2
49.5%
occurrenceStatus 277,280
100.0%
scientificName 59
0.0%
scientificNameID 277,280
100.0%

Quality flags

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

Flag Dropped Records
NO_DEPTH 137,360
49.5%
ON_LAND 34,235
12.3%
NO_COORD 31,966
11.5%
NO_MATCH 19,113
6.9%
NOT_MARINE 16,598
6.0%
DEPTH_EXCEEDS_BATH 13,393
4.8%
NO_ACCEPTED_NAME 1,664
0.6%
MARINE_UNSURE 1,638
0.6%
WORMS_ANNOTATION_RESOLVABLE 414
0.1%
WORMS_ANNOTATION_REJECT_AMBIGUOUS 30
0.0%
DATE_IN_FUTURE 24
0.0%
DATE_BEFORE_MIN 14
0.0%
DEPTH_OUT_OF_RANGE 3
0.0%
ZERO_COORD 1
0.0%

Measurement types

DNA derived data