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Table 1 Review of the characters from synonymized taxa of Thysanozoon brocchii

From: First record of Thysanozoon brocchii (Platyhelminthes: Polycladida) from Indian waters

Synonymized taxa

Body form

Colour -pattern

Eye spots/arrangement

Habitat/Locality

Remarks

Tergipes dicquemare Risso, 1818

oblong, flattened,

Dorsal: covered with many sessile papillae serving as respiratory organ, tentacles earlike,

Ventral: greyish

Dorsal

White- yellowish Intestinal canal - white –reddish

-

Under stone

Nice sea, France

-

Planaria tuberculata Delle chiaje, 1828

compressed, ovate, wide

Dorsal: papillate; absent towards margin, longitudinal median line present

Dorsal

Papillae: few with white dots, median line white colour

Margin: white band even on pseudotentacles

-

Algae dweller

Naples, Italy

Not identical to Planaria brocchii described by

Risso 1818, although has certain similar characters in body colouration

Thysanozoon tuberculatum Delle Chiaje, 1828

Elliptical

Dorsal: long tentacles, median papillae with conical tip

Dorsal: Blackish

Papillae: median with white tip and bluish at the base

-

Found among algae

-

Planaria verrucosa Delle chiaje, 1829

Dorsal: papillate; more on back and smaller towards margin

Dorsal

Margin: milky white and black

-

Naples, Italy

differs from P. tuberculata being small, colourful

margin without papillae and papillae bears white dots at the tip

Stylochus papillosus Diesing, 1836

½ - 1-1/2 in.

narrows ovate flattened

Tentacles: filament like, medially raised (keel on the middle)

Papillae: numerous papillae present on the keel area

Dorsal: light yellow or reddish-brown keel: white

Indefinite number on the disc shape bright spot

Adriatic Sea

-

Thysanozoon diesingii Grube, 1840

flat, leaf like

Dorsal: covered with papillae (pedicels)

Dorsal: longitudinal bright yellowish line

Margin: white with purple dash lines

Eye spots 31–28

Palermo-Italy

east coast of Ceylon (Sri-Lanka) Indian Ocean

compared with Mediterranean P. brochii and P. tuberculata

and mentioned the similarity with P. brochii except for the

absence of papillae opening

Planaria dicquemari Delle Chiaje, 1841

Papillae: larger in the middle and smaller towards margin

Dorsal: Yellow, blackish speckled

Margin: whitish

In two groups at the base of the tentacles

 

differs from P. tuberculata (Delle Chiaje, 1828)

in terms of size, papillae and colour

Thysanozoon diequemaris (Delle Chiaje, 1841) Diesing, 1850

Elliptical,

Papillae: long, conical, tentacles somewhat sickle shape

Dorsal: Body greyish

Papillae: yellowish white

Ventral: Grey

-

In stones- Mediterranean Sea

-

Eolidiceros brochii

Quatrafages, 1845

regularly elliptical, slightly curved in the middle

Tentacles: triangular, Papillae

(appendages): fusiform, longer and bigger and smaller towards edges

Size: 18 mm

Dorsal: light yellowish brown, edges are transparent and bluish

Upper side of the head region is white; tinted with greenish, sides are light brown

Papillae: reddish-brown but tip is yellowish white; blackish purple dots all over the surface

Numerous

CE: 20–25

TE: group of 5–6 eyespots between the tentacles

In Fucus

Naples

May be similar to Planaria tuberculate (Delle Chiaje, 1828)

Eolidiceros panormis Quatrefage, 1845

elliptical, triangular head and straight large tentacles

Dorsal: papillate (cylindrical appendages)

Size: 6 mm × 3 mm

Dorsal: mid region yellow-greenish speckled with brown, head region white, anterior end with purple and brown pigments, transverse pale yellow band present 1/3 posterior of the body

Papillae: similar colour like body but less numerous than E. brocchii

Margin: brown speckled and purple dashes

Dorsal: 3 large eyespots

surrounded by smaller ones;

one is posterior and two are at the base of the pseudotentacles

Ventral: arranged between and at the base of the pseudotentacles

on rock

Palermo, Italy

Compared with E. brocchii for eyespots, body shape, colour pattern and arrangement of dorsal papillae

Thysanozoon fockei Diesing, 1850

Sub elliptical

Dorsal: papillated

Papillae: yellow-purple papillae

-

Tergesti, Italy

-

Planeolis panormus, Stimpson 1857

Papillae: scattered over the body; head larger and with large tentacles

-

ocelli on the tentacles at the base of the tentacles and between the tentacles

-

information about genus is given but refers to Eolidiceros panormus Quatrefage, 1845 for the species description

Thysanozoon sp. (Eolidiceros quatrefages) Moseley, 1877

Size: when expanded 10 cm × 6 cm

Dorsal: dark purple, tubercles with white tip

-

Zamboangan, Philippines

 

Thysanozoon brochii var. cruciatum Laidlaw, 1906

Size: 8–16 mm

Dorsal: yellow-dark gray, narrow longitudinal white stripe and 1/3 posterior transverse band present

-

under rock

Porto Praya,

Cape Verde Island

-

Thysanozoon lagidium Marcus, 1949

Dorsal: papillate

Size: 13x7mm

Dorsal: Grayish brown-purplish

Papillae: darker, few with white tip light coloured papillae forming longitudinal stripe and medial transverse stripe present

-

Brazil

-

Thysazonoon cf. lagidium Quiroga et al. 2004

Based on image presented in the paper

-

Dorsal

Papillae: black- brown

midline papillae whitish; whitish papillae forming cross are present around 1/3rd of body length

 

Coloumbia; Brazil

-