Table 4 All mitochondrial genomes used in the present study

SOLENOGASTRES

“Cavibelonia” - Amphimeniidae

Alexandromenia crassa +

PP333953

15,748 bp, two contigs*

“Cavibelonia” - Amphimeniidae

Amphimeniidae sp. +

PP333954

15,587 bp, two contigs*

“Cavibelonia” - Proneomeniidae

Dorymenia sp. +

PP333956

15,103 bp, two contigs

“Cavibelonia” - Pruvotinidae

Pruvotininae sp. +

PP333952

15,347 bp, one contig

“Cavibelonia” - Simrothiellidae

Kruppomenia borealis +

PP333955

15,857 bp, two contigs

Pholidoskepia - Gymnomeniidae

Wirenia argentea +

PP333957

17,090 bp, two contigs

Neomeniamorpha - Neomeniidae

Neomenia carinata

MF693834.1 [22]

12,318 bp*

CAUDOFOVEATA

Chaetodermatida - Chaetodermatidae

Chaetoderma nitidulum

EF211990.1

21,008 bp

Chaetodermatida - Chaetodermatidae

Falcidens acutargatus

MF568514 [22]

14,209 bp

Chaetodermatida - Chaetodermatidae

Falcidens halanychi

MF568515 [22]

14,508 bp

Limifossorida - Scutopodidae

Scutopus ventrolineatus

KC757645 [28]

14,662 bp

Limifossorida - Scutopodidae

Scutopus robustus

MF579533 [22]

14,515 bp

Limifossorida - Limifossoridae

Psilodens balduri

MF579532 [22]

14,513 bp*

POLYPLACOPHORA

Chitonida - Acanthochitonidae

Acanthochitona avicula

NC047426 [21]

15,203 bp

Chitonida - Callochitonidae

Callochiton steinenii

MN864061 [21]

11,923 bp*

Chitonida - Chitonidae

Sypharochiton pelliserpentis

KJ534307 [73]

15,048 bp

Chitonida - Tonicellidae

Nuttallina californica

KJ569362 [74]

15,604 bp

Chitonida - Mopaliidae

Cryptochiton stelleri

KJ569363 [74]

15,082 bp

Chitonida - Mopaliidae

Katharina tunicata

KTU09810 [75]

15,532 bp

Chitonida - Chaetopleuridae

Chaetopleura apiculata

KY824658 [54]

15,108 bp

Lepidopleurida - Nierstraszellidae

Nierstraszella lineata

NC047421 [21]

15,765 bp

Lepidopleurida - Lepidopleuridae

Leptochiton nexus

NC047422 [21]

15,488 bp

MONOPLACOPHORA

Tryblidiida - Neopilinidae

Laevipilina antarctica

NC033380 [19]

18,642 bp