Sea cucumbers of the genus Labidodemas (Holothuroidea: Holothuriida: Holothuriidae) from Indonesia, with the description of a new species and a revised key to the genus Author Setyastuti, Ana Research Center for Oceanography, National Research and Innovation Agency (BRIN). Jalan Pasir Putih I, Ancol Timur, Jakarta Utara, 14430, Indonesia Author Solis-Marin, Francisco Alonso Colección Nacional de Equinodermos “ Dra. Ma. Elena Caso Muñoz ”, Laboratorio de Sistemática y Ecología de Equinodermos, Instituto de Ciencias del Mar y Limnología (ICML), Universidad Nacional Autónoma de México (UNAM), Ciudad de México, C. P. 04510, México Author Lüter, Carsten Museum fuer Naturkunde, Leibniz Institute for Evolution and Biodiversity Science. Invalidenstr. 43, 10115, Berlin, Germany text Zootaxa 2024 2024-09-06 5506 2 227 244 http://dx.doi.org/10.11646/zootaxa.5506.2.4 journal article 303283 10.11646/zootaxa.5506.2.4 0e7b0873-7341-4112-b9b4-492b0d23cf17 1175-5326 13746857 55527A8F-3454-49A2-AD65-ECBAE234C03D

TABLE 1. Characters differentiate Labidodemas javaensis sp. nov. from L. quadripartitum Massin, Samyn & Thandar 2004, L semperianum Selenka, 1867, and L. pseudosemperianum Massin, Samyn & Thandar 2004.

Character	L. javaensis sp. nov.	L. quadripartitum Massin,	L. semperianum Selenka,	L. pseudosemperianum
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		Samyn & Thandar, 2004	1867 (Massin et al. 2004;	(Massin et al. 2004;
		(Massin et al. 2004;	Samyn et al. 2005)	Samyn et al. 2005)
		Samyn et al. 2005)
Body colour in	White uniformly,	Dorsally whitish,	According to the original	White-pink with yellow
the living animal	anterior and posterior	ventrally reddish	description, animal	tube feet; around the
	parts dark brown		colourless, and brownish	mouth colour deep pink
			at the ends of the body	to brown
			(“Thier farbios, an den
			Körperenden bräunlich”).
			Not available for lectotype
			and paralectotype
Tentacle	20, dendritic, yellowish	Tentacles retracted;	12 in lectotype (but	20
		number could not be	probably the number
		determined	is 20 as in all the other
			Labidodemas species)
Anal papillae	present	absent	present	absent
		Samyn & Thandar, 2004	1867 (Massin et al. 2004;	(Massin et al. 2004;
		(Massin et al. 2004;	Samyn et al. 2005)	Samyn et al. 2005)
		Samyn et al. 2005)
Tables	-Disc with 4–5 central	-Disc with 4 central holes	-Disc with 4–6 central	-Disc with 5–8 central
	holes	-Disc with 0–2	holes	holes
	-Mainly disc devoid of	(occasionally six)	-Disc with 5–10 peripheral	-Disc with 5–15
	peripheral holes, rarely	peripheral holes	holes	peripheral holes
	with 2–4 peripheral
	holes	-Disc 30–60 µm across
	-Disc 40–100 µm across	-Rim of the disc spiny	-Disc 55–90 µm across	-Disc 70–95 µm across
	-Rim of the disc very	-Crown with 4 huge	-Rim of the disc spiny	-Rim of the disc smooth
	spiny	spines that occasionally	-Crown with 4–5 huge	-Crown with 5–8 huge
	-Crown with 4–5 huge	bifurcate distally	spines that bifurcate	spines that bifurcate
	spines, arranged in		slightly distally	deeply distally
	regular or irregular/
	overlapping, always	-Table crown> table disc
	bifurcate distally		-Table crown ≥ table disc	-Table crown >> table
	-Table crown> table disc	-Crown of spines with		disc (crown up to twice
		one central hole	-Crown of spines with one	the disc)
	-Crown of spines with		(occasionally two) central	-Crown of spines with
	one central hole	-Dorsal table few	hole	2–10 central holes
	-Dorsal table numerous	-Ventral tube feet table	-Dorsal table numerous	-Dorsal table numerous
		mostly reduced to
	-Ventral tube feet table	disc, 33–42 µm across,	-Ventral tube feet tables are	-Ventral tube feet
	mostly reduced to	perforated by 3–4 central	reduced to the spiny-edge	table mostly reduced
	disc, 40–60 µm across,	holes and occasionally a	disc, 40–50 µm across,	to disc, 45–50 µm
	perforated by 4–5	single peripheral hole, rim	perforated by 3–4 central	across, perforated by
	central holes, never with	of disc slightly spinous	holes and occasionally 1–2	4–6 central holes and
	peripheral holes, rim of		peripheral holes	occasionally a single
	disc very spinous with			peripheral hole, rim of
	several elongated spines			the disc slightly spinous
	that bifurcate distally
Buttons	Absent	Absent	Present in dorsal body wall	Present in dorsal and
				ventral body wall
Pseudo-buttons	Present in dorsal body	Absent	Present in dorsal body wall	Present (a few) in
	wall, dorsal papillae, and		and dorsal papillae	ventral tube feet
	ventral tube feet
Tri-radiate rods	Present	Absent	Absent	Absent
dorsal body wall
and anal papillae