Table 1. Taxa collected for the classical and metabarcoding reference collection.

(A) Number of arthropods collected per pitfall in the first two sampling seasons (September 2010 and May 2011). In September 2017 we only recorded the presence of each arthropod category for the DNA reference collection. (B) Plant and vertebrate sampled for the DNA reference collection. NI stands for non-identified preys and • for prey presence.

A				B
Taxonomic category	09/10	05/11	09/17	Taxonomic category	09/17
Arachnida				Magnoliopsida
NI Acari	0.00	2		Apiales
Pseudoscorpiones				Apiaceae
Cheliferidae	1	1		Astydamia latifolia	•
Araneae				Asterales
Gnaphosidae	7	2		Asteraceae
Salticidae	–	–	•	Senecio incrassatus	•
Insecta				Caryophyllales
Coleoptera				Aizoaceae
Carabidae	5	2	•	Aizoon canariensis	•
NI Sp. A	1	0		Mesembryanthemum sp.	•
Tenebrionidae				Amaranthaceae
Hegeter latebricola	–	–	•	Chenopodium coronopus	•
Diptera				Fabales
Dolichopodidae	2	3		Fabaceae
Hybotidae	2	0		Lotus glaucus	•
Limoniidae	1	0		Solanales
NI Sp. C	6	18		Solanaceae
Hemiptera				Lycopersicon esculentum	•
Aphididae	0	1		Solanum nigrum	•
Cicadellidae	–	–	•	Gentianales
Hymenoptera				Apocynaceae
Formicidae	213	147	•	Periploca laevigata	•
Isopoda
Porcellionidae	–	–	•
Lepidoptera
Cosmopterigidae	–	–	•	Aves
Pyralidae	–	–	•	Procellariiformes
Psocoptera				Procellariidae
Ectopsodidae	1	0		Bulweria bulwerii	•
Psyllipsocidae	32	1		Calonectris borealis	•
Zygentoma
Lepismatidae	2	0	•
Chilopoda
Scutigeromorpha
Scutigeridae
Scutigera coleoptrata	–	–	•