Sea Slugs in Horse Shoes, Okinawa Island (Onna and Yomitan area) 263

Phyllidia willani

Brunckhorst, 1993

Hypselodoris apolegma

(Yonow, 2001)

Tomoberthella martensi

(Pilsbry, 1896)

Halgerda carlsoni

Rudman, 1978

Aegires lemoncello

Fahey & Gosliner, 2004

Goniobranchus kuniei

(Pruvot-Fol, 1930)

Goniobranchus sp. 3

Sagaminopteron psychedelicum

Carlson & Hoff, 1974

Elysia mercieri

(Pruvot-Fol, 1930)

Aldisa albatrossae

Elwood, Á. Valdés & Gosliner, 2000

Phyllidiopsis xishaensis

(G.-Y. Lin, 1983)

Ardeadoris cruenta

(Rudman, 1986)

Chromodoris colemani

Rudman, 1982

Lamprohaminoea cymbalum

(Quoy & Gaimard, 1833)

Halgerda brunneomaculata

Carlson & Hoff, 1993

Halgerda diaphana

Fahey & Gosliner, 1999

Halgerda elegans

Bergh, 1905

Chromodoris strigata

Rudman, 1982

Hypselodoris bullockii

(Collingwood, 1881)

Tenellia sp.97

Elysia rufescens

(Pease, 1871)

Pleurehdera sp. 1

Notodoris citrina

Bergh, 1875

Chromodoris willani

Rudman, 1982

Ardeadoris averni

(Rudman, 1985)

Hypselodoris maculosa

(Pease, 1871)

Diversidoris crocea

(Rudman, 1986)

Phyllidia babai

Brunckhorst, 1993

Phyllidia elegans

Bergh, 1869

Phyllidiopsis cardinalis

Bergh, 1876

Phyllidiopsis sphingis

Brunckhorst, 1993

Samla bicolor

(Kelaart, 1858)

Tenellia sp.10

Volvatella viridis

Hamatani, 1976

Phyllidiella pustulosa

(Cuvier, 1804)

Reticulidia fungia

Brunckhorst & Gosliner, 1993

Elysia lobata

A. A. Gould, 1852

Pleurobranchus peronii

Cuvier, 1804

Kaloplocamus dokte

Vallès & Gosliner, 2006

Gymnodoris okinawae

Baba, 1936

Halgerda tessellata

(Bergh, 1880)

Jorunna funebris

(Kelaart, 1858)

Rostanga sp. 2

Chromodoris aspersa

(A. A. Gould, 1852)

Goniobranchus geometricus

(Risbec, 1928)

Goniobranchus rufomaculatus

(Pease, 1871)

Goniobranchus sp. 1

Diversidoris flava

(Eliot, 1904)

Verconia norba

(Er. Marcus & Ev. Marcus, 1970)

Verconia simplex

(Pease, 1871)

Thorunna australis

(Risbec, 1928)

Thorunna halourga

R. F. Johnson & Gosliner, 2001

Phyllidia coelestis

Bergh, 1905

Phyllidiopsis krempfi

Pruvot-Fol, 1957

Dermatobranchus semilunus

Gosliner & Fahey, 2011

Halgerda sp. 3

Hypselodoris sp.24

Sagaminopteron ornatum

Tokioka & Baba, 1964

Julia zebra

Kawaguchi, 1981

Thuridilla hoffae

Gosliner, 1995

Cyerce kikutarobabai

Hamatani, 1976

Costasiella fridae

Fernández-Simón & Moles, 2023

Pleurobranchus forskalii

Rüppell & Leuckart, 1828

Halgerda albocristata

Gosliner & Fahey, 1998

Hallaxa paulinae

Gosliner & S. Johnson, 1994

Ardeadoris egretta

Rudman, 1984

Cadlinella ornatissima

(Risbec, 1928)

Chromodoris sp.14

Goniobranchus decorus

(Pease, 1860)

Goniobranchus reticulatus

(Quoy & Gaimard, 1832)

Glossodoris hikuerensis

(Pruvot-Fol, 1954)

Glossodoris buko

S. B. Matsuda & Gosliner, 2018

Glossodoris rufomarginata

(Bergh, 1890)

Ardeadoris tomsmithi

(Bertsch & Gosliner, 1989)

Hypselodoris krakatoa

Gosliner & R. F. Johnson, 1999

Thorunna purpuropedis

Rudman & S. Johnson, 1985

Ceratophyllidia sp. 1

Phyllidia picta

Pruvot-Fol, 1957

Phyllidiopsis fissurata

Brunckhorst, 1993

Phyllidiopsis pipeki

Brunckhorst, 1993

Abronica purpureoanulata

(Baba, 1961)

Chromodoris sp. 3

Tenellia sp.51

Phyllidiidae spp.

Chromodorididae spp.

Halgerda labyrinthus

Donohoo & Gosliner, 2023

Phyllidiidae sp. 2

Bornella anguilla

S. Johnson, 1984

Chelidonura amoena

Bergh, 1905

Mariaglaja inornata

(Baba, 1949)

Dolabrifera dolabrifera

(Rang, 1828)

Oxynoe viridis

(Pease, 1861)

Elysia asbecki

Wägele, Stemmer, Burghardt & Händeler, 2010

Elysia sp. 7

Thuridilla livida

(Baba, 1955)

Cyerce liliuokalaniae

K. Moreno, Gosliner, N. G. Wilson, Krug & Á. Valdés, 2025

Polycera sp. 1

Plocamopherus imperialis

Angas, 1864

Nembrotha chamberlaini

Gosliner & Behrens, 1997

Aegires exeches

Fahey & Gosliner, 2004

Aegires petalis

Fahey & Gosliner, 2004

Aegires villosus

Farran, 1905

Gymnodoris sp. 3

Aldisa zavorensis

Tibiriçá, Pola & Cervera, 2017

Diaulula sp.

Halgerda onna

Fahey & Gosliner, 2001

Paradoris sp. 1

Hallaxa indecora

(Bergh, 1905)

Ceratosoma sp. 1

Chromodoris michaeli

Gosliner & Behrens, 1998

Goniobranchus setoensis

(Baba, 1938)

Diversidoris aurantionodulosa

Rudman, 1987

Glossodoris sp. 1

Ardeadoris symmetrica

(Rudman, 1990)

Hypselodoris sp.18

Hypselodoris bollandi

Gosliner & R. F. Johnson, 1999

Hypselodoris rositoi

Gosliner & R. F. Johnson, 2018

Mexichromis mariei

(Crosse, 1872)

Ardeadoris angustolutea

(Rudman, 1990)

Verconia romeri

(Risbec, 1928)

Verconia varians

(Pease, 1871)

Thorunna daniellae

(Kay & D. K. Young, 1969)

Thorunna furtiva

Bergh, 1878

Phyllidia exquisita

Brunckhorst, 1993

Phyllidia scottjohnsoni

Brunckhorst, 1993

Phyllidiidae sp. 1

Hancockia sp. 2

Tritonia sp. 1

Doto cervicenigra

Ortea & Bouchet, 1989

Cratena sp.11

Phyllodesmium magnum

Rudman, 1991

Pruvotfolia sp. 3

Tenellia sp.11

Cadlinella subornatissima

Baba, 1996

Diaphorodoris sp. 2

Goniobranchus sp. 4

Pelagella sp. 3

Samla sp. 1

Hypselodoris variobranchia

Gosliner & R. F. Johnson, 2018

Pteraeolidia semperi

(Bergh, 1870)

Facelina sp. 2

Phyllodesmium sp. 1

Hypselodoris lacuna

Gosliner & R. F. Johnson, 2018

Hallaxa sp. 1

Phyllodesmium acanthorhinum

E. Moore & Gosliner, 2014

Niparaya sp. 2

Aeolidina spp.

Tritoniopsis cf. frydis

Anteaeolidiella takanosimensis

(Baba, 1930)

Tenellia sp. 4

Polycera sp. 9

Elysia sp.24

Glossodoris sp. 2

Julia mishimaensis

Kawaguti & Yamasu, 1982

Hypselodoris sp.23

Thuridilla albopustulosa

Gosliner, 1995

Goniobranchus coi

(Risbec, 1956)

Tritoniopsis elegans

(Audouin, 1826)

Spinoaglaja orientalis

(Baba, 1949)

Odontoglaja guamensis

Rudman, 1978

Gastropteron sp. 3

Siphopteron brunneomarginatum

(Carlson & Hoff, 1974)

Ilbia mariana

Hoff & Carlson, 1990

Aplysia nigrocincta

E. von Martens, 1880

Volvatella angeliniana

M. Ichikawa, 1993

Lobiger viridis

Pease, 1863

Bosellia sp. 1

Elysia sp. 2

Elysia sp. 5

Thuridilla kathae

Gosliner, 1995

Thuridilla splendens

(Baba, 1949)

Sacoproteus smaragdinus

(Baba, 1949)

Hexabranchus lacer

(Cuvier, 1804)

Plocamopherus maculatus

(Pease, 1860)

Martadoris sp. 1

Bermudella sp. 1

Aegires flores

Fahey & Gosliner, 2004

Aegires incusus

Fahey & Gosliner, 2004

Aegires malinus

Fahey & Gosliner, 2004

Notodoris gardineri

Eliot, 1906

Gymnodoris sp.33

Aldisa pikokai

Bertsch & S. Johnson, 1982

Carminodoris estrelyado

(Gosliner & Behrens, 1998)

Thordisa sp. 2

Miamira moloch

(Rudman, 1988)

Ceratosoma palliolatum

Rudman, 1988

Miamira sinuata

(van Hasselt, 1824)

Ceratosoma tenue

Abraham, 1876

Goniobranchus albopunctatus

Garrett, 1879

Chromodoris annae

Bergh, 1877

Goniobranchus collingwoodi

(Rudman, 1987)

Chromodoris magnifica

(Quoy & Gaimard, 1832)

Goniobranchus roboi

(Gosliner & Behrens, 1998)

Doriprismatica atromarginata

(Cuvier, 1804)

Mexichromis pusilla

(Bergh, 1874)

Glossodoris cf. cincta

(Bergh, 1888)

Ardeadoris electra

(Rudman, 1990)

Hypselodoris emma

Rudman, 1977

Hypselodoris infucata

(Rüppell & Leuckart, 1830)

Hypselodoris whitei

(A. Adams & Reeve, 1850)

Verconia sp. 4

Ceratophyllidia sp. 2

Phyllidia ocellata

Cuvier, 1804

Phyllidia polkadotsa

Brunckhorst, 1993

Phyllidia larryi

(Brunckhorst, 1993)

Phyllidiella annulata

(J. E. Gray, 1853)

Dermatobranchus albus

(Eliot, 1904)

Dermatobranchus rodmani

Gosliner & Fahey, 2011

Cephalopyge trematoides

(Chun, 1889)

Coryphellina delicata

(Gosliner & Willan, 1991)

Coryphellina exoptata

(Gosliner & Willan, 1991)

Cratena affinis

(Baba, 1949)

Cratena simba

Edmunds, 1970

Facelina bourailli

(Risbec, 1928)

Favorinus japonicus

Baba, 1949

Favorinus mirabilis

Baba, 1955

Herviella affinis

Baba, 1960

Moridilla brockii

Bergh, 1888

Sakuraeolis kirembosa

Rudman, 1980

Tenellia diversicolor

(Baba, 1975)

Tenellia ornata

(Baba, 1937)

Phestilla melanobrachia

Bergh, 1874

Phanerophthalmus lentigines

Austin, Gosliner & Malaquias, 2018

Verconia sp. 1

Lomanotus sp. 1

Thorunna sp. 4

Unidentia sp. 1

Paradoris sp. 4

Haminoeidae sp. 3

Micromelo barbarae

Feliciano, Malaquias, Stout, Brenzinger, Gosliner & Á. Valdés, 2021

Thorunna sp. 2

Thorunna sp. 3

Cratena sp. 3

Phyllodesmium undulatum

E. Moore & Gosliner, 2014

Lamprohaminoea evelinae

Oskars & Malaquias, 2020

Avaldesia albomacula

(J. M. Chan & Gosliner, 2007)

Eubranchus sp. 9

Elysia sp.10

Tenellia sp.37

Facelina sp. 5

Chromodoris sp. 4

Anteaeolidiella sp. 1

Discodorididae sp. 8

Tenellia sp. 7

Noumeaella sp. 4

Vellicolla muscaria

(A. A. Gould, 1859)

Facelinidae sp.11

Abronica payaso

A. Y. Kim & Gosliner, 2024

Gymnodoris sp.31

Bursatella ocelligera

(Bergh, 1902)

Facelinidae sp.14

Hexabranchus sanguineus

(Rüppell & Leuckart, 1830)

Goniodoridella sp.16

Avaldesia spp.

Chromodoris sp.13

Anteaeolidiella sp. 3

Gymnodoris bricei

De Souza-Canal & Valdés, 2025

Haminoeidae sp.11

Gymnodoris sp.43

Chromodorididae sp.10

Crimora sp. 1

Facelinidae sp.16

Hypselodoris sp.22