Gelasimus jocelynae ( Shih, Naruse and Ng, 2010 )

Murniati, Dewi Citra, Asakura, Akira, Nugroho, Dharma Arif, Hernawan, Udhi Eko & Dharmawan, Wayan Eka, 2022, On a collection of thoracotreme crabs (Crustacea: Brachyura: Ocypodidae, Macrophthalmidae, Dotillidae) from two offshore islands of Papua, eastern Indonesia, with descriptions of two new species, Raffles Bulletin of Zoology 70, pp. 461-491 : 466-469

publication ID

https://doi.org/ 10.26107/RBZ-2022-0026

publication LSID

lsid:zoobank.org:pub:2E07F63A-50B5-42CE-98FA-027B0BF38756

DOI

https://doi.org/10.5281/zenodo.7502082

persistent identifier

https://treatment.plazi.org/id/03B087C6-4E48-FF8F-60BE-25D64E4EFAD5

treatment provided by

Felipe

scientific name

Gelasimus jocelynae ( Shih, Naruse and Ng, 2010 )
status

 

Gelasimus jocelynae ( Shih, Naruse and Ng, 2010) View in CoL .

( Fig. 4 View Fig )

Mesuca (Latuca) neocultrimana Bott, 1973: 317 View in CoL (in part: Halmahera, Sulawesi). Not Mesuca (Latuca) neocultrimana Bott, 1973 View in CoL (= Gelasimus excisus ( Nobili, 1906)) View in CoL .

Uca (Thalassuca) vocans pacificensis Crane, 1975: 90 View in CoL (in part: Ambon). Not Uca (Thalassuca) vocans pacificensis Crane, 1975 View in CoL (= Gelasimus excisus ( Nobili, 1906)) View in CoL .

Uca jocelynae Shih et al., 2010: 51 View in CoL , fig. 2, fig. 3, fig. 4 (Sulawesi) Gelasimus jocelynae View in CoL – Shih et al., 2016: 151, fig. 7D (Bunaken, North Sulawesi).

Material examined. 17 males (14.0 × 9.4 mm – 18.4 × 12.8 mm) ( MZB.Cru.4912), Liki Village, Sarmi District, Sarmi Municipality , Liki Island , Papua Province, 01º37′25.29″S, 138º44′26.54″E, 23 November 2018, DC Murniati GoogleMaps ; 2 males (14.3 × 9.6 mm – 18.2 × 11.8 mm) ( MZB.Cru.3723), Kaimana , West Papua Province, 26 June 2001, DL Rahayu ; 1 male (24.5 × 15.4 mm) ( MZB.Cru.3911) Kamora Village , Mimika, Papua Province, DL Rahayu .

Comparative material examined. Gelasimus vocans ( Linnaeus, 1758) , 4 males (17.4 × 12.0 mm – 20.0 × 13.2 mm) ( MZB.Cru.3728), Gilimanuk Bay, Malaya District, Jembrana Municipality , West Bali National Park , Bali Province, 14 July 2009, DC Murniati; (18.3 × 12.4 mm – 23.1 × 14.8 mm) ( MZB.Cru.4179), Jebak River , Blonsong, Kidang Village , East Praya District , Central Lombok Municipality , 25 April 2015, DC Murniati, Mariana .

Remarks. This species belongs to the Gelasimus vocans complex, and was described as new based on morphological and molecular data by Shih et al (2010). Close similarities are present between G. vocans and G. jocelynae in the live colouration of the body and morphology of the major chela of the male. In both species, the carapace is generally white to greyish-white and the cheliped is deep yellow to orange in the lower part of the palm and fixed finger ( Fig. 4A View Fig ); the major chela has two distinct teeth with a wide gap on the cutting margin of the fixed finger ( Fig. 4C View Fig ). Our careful examination has shown that the specimens agree well with the description by Shih et al. (2010) for Uca jocelynae .

Based on our observation of comparative materials, Gelasimus jocelynae differs from G. vocans in the shape of the major chela. In G. jocelynae , the proximal portion of the dactylus is slightly wider than that of the fixed finger, and the distal tooth of the fixed finger is small and positioned subdistally ( Fig. 4C View Fig ). Meanwhile, in G. vocans , the proximal portion of the dactylus is narrower than that of the fixed finger, and the distal tooth of the fixed finger is large and positioned distally.

We found some morphological variations in the male chela within the population of G. jocelynae from Liki Island. In some specimens, the width of the proximal portion of the dactylus and fixed finger are similar, while others have a slightly wider proximal portion of the fixed finger compared to the dactylus. Nonetheless, the morphology of the G1 of all our specimens ( Fig. 4H–I View Fig ) is well in agreement with the illustration given by Shih et al. (2010).

According to Shih et al. (2010), the geographical distribution of this species is confined to the Western Pacific islands including Papua New Guinea. The present record extends the distribution of this species further eastward in the Indonesian Archipelago. This species inhabits sandy-muddy substrates on the intertidal zone of the coast.

MZB

Museum Zoologicum Bogoriense

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

InfraOrder

Brachyura

Family

Ocypodidae

SubFamily

Gelasiminae

Genus

Gelasimus

Loc

Gelasimus jocelynae ( Shih, Naruse and Ng, 2010 )

Murniati, Dewi Citra, Asakura, Akira, Nugroho, Dharma Arif, Hernawan, Udhi Eko & Dharmawan, Wayan Eka 2022
2022
Loc

Uca jocelynae

Shih HT & Ng PKL & Davie PJF & Schubart CD & Turkay M & Naderloo R & Jones D & Liu MY 2016: 151
Shih HT & Naruse T & Ng PKL 2010: 51
2010
Loc

Uca (Thalassuca) vocans pacificensis

Crane J 1975: 90
1975
Loc

Mesuca (Latuca) neocultrimana

Bott R 1973: 317
1973
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