Name: CAS Invertebrate Zoology (IZ)
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)

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

Published

August 10, 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

Archive

http://ipt.calacademy.org:8080/archive.do?r=invz

Contacts

Christina Piotrowski
California Academy of Sciences

Jon Fong
California Academy of Sciences

282,718

total submitted occurrences

231,187

accepted occurrences

18,685

taxa

15,045

species

Taxa

Missing and invalid fields

Field	Missing	Invalid
coordinateUncertaintyInMeters	139,954		49.5%
decimalLatitude	33,910		12.0%
decimalLongitude	33,915		12.0%
eventDate	30,510		10.8%
maximumDepthInMeters	225,168	1	79.6%
minimumDepthInMeters	140,988	2	49.9%
occurrenceStatus	282,718		100.0%
scientificName	61		0.0%
scientificNameID	282,718		100.0%

Quality flags

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

Flag	Records
NO_DEPTH	140,990	49.9%
ON_LAND	34,682	12.3%
NO_COORD	33,916	12.0%
NO_MATCH	19,991	7.1%
NOT_MARINE	17,649	6.2%
DEPTH_EXCEEDS_BATH	14,120	5.0%
NO_ACCEPTED_NAME	1,674	0.6%
MARINE_UNSURE	1,658	0.6%
WORMS_ANNOTATION_RESOLVABLE	414	0.1%
WORMS_ANNOTATION_REJECT_AMBIGUOUS	30	0.0%
DATE_IN_FUTURE	20	0.0%
DATE_BEFORE_MIN	13	0.0%
DEPTH_OUT_OF_RANGE	3	0.0%
ZERO_COORD	1	0.0%

CAS Invertebrate Zoology (IZ)

Taxa

Missing and invalid fields

Quality flags

Measurement types

DNA derived data