Notacanthomysis hodgarti (W.M. Tattersall, 1922 )

Yolanda, Rofiza, Ambarwati, Reni, Rahayu, Dwi Anggorowati, Budijastuti, Widowati, Fitrihidajati, Herlina, Kuntjoro, Sunu, Rachmadiarti, Fida & Purnomo, Tarzan, 2023, An annotated checklist of the species of Lopogastrida and Mysida (Crustacea Peracarida) from Thailand and its adjacent waters, Zootaxa 5244 (3), pp. 201-232 : 216-217

Notacanthomysis hodgarti (W.M. Tattersall, 1922)

= Acanthomysis hodgarti (W.M. Tattersall, 1922)

= Neomysis hodgarti W.M. Tattersall, 1922

Type locality. Rajang River , Sarawak, Borneo Island (W.M. Tattersall 1922) .

Record from Thailand. Chacoengsao and Bang Pakong River, Chaehoengsao, northern part of Gulf of Thailand ( Murano 1988; Fukuoka & Murano 2000).

Habitat and depth. Murano (1988) and Fukuoka & Murano (2000) did not provide the depth of this species when it was recorded, but its habitat is in estuarine and coastal water. According to Chaiyarak et al. (2019) Chacoengsao estuary dan Bang Pakong River can reach about 45 meter in depth. Meanwhile, specimens from Singapore were collected from 82 meter vertical haul (O.S. Tattersall 1960).

Distribution. This species is known from Sarawak, Borneo (W.M. Tattersall 1922), Singapore Strait (O.S. Tattersall 1960), Strait of Malacca (O.S. Tattersall 1965), Bang Pakong River and Chaehoengsao ( Murano 1988; Fukuoka and Murano 2000) and Matang Mangrove, Malaysia ( Ramarn et al. 2012a)

Remarks. W.M. Tattersall (1922) originally described this species as two separate taxa, Neomysis hodgarti and Acanthomysis hodgarti . These species were later revised by Fukuoka & Murano (2000) who established the genus Notacanthomysis for A. hodgarti (W.M. Tattersall 1922) and A. platicauda ( Pillai, 1961) . Characteristics of the genus Acanthomysis differing from Notacanthomysis as follows: in Acanthomysis (1) the carpopropodus of the third to eighth thoracic endopods is divided into three articles, (2) the proximal lobes of all the pleopods in both sexes, except the fourth pleopod of the male are well developed, (3) the two terminal setae of the exopod of the male fourth pleopod are not only unequal in length (longer seta about one and half times as long as shorter one) but subequal in diameter, and they become abruptly more slender in the terminal portion, which is unarmed and spiniform, and (4) the lateral margin of the telson is armed with a few spines on the basal region. In Notacanthomysis , (1) the carpopropodus of the third to eighth thoracic endopods is divided into four or five articles; (2) the proximal lobes of all the pleopods in both sexes, except the fourth pleopod of the male, are less developed (3) the two terminal setae of the exopod of the male fourth pleopod are remarkably different in length (longer seta stouter and more than three times as long as the shorter one) and gradually narrowing towards the tip (4) the telson is laterally unarmed on the proximal margins ( Fukuoka & Murano 2000).