Papers by Rueangrit Promdam
Tropical Natural History, 2023
A new species of vampire crab, Geosesarma todaeng, is described from a freshwater swamp forest in... more A new species of vampire crab, Geosesarma todaeng, is described from a freshwater swamp forest in Narathiwat Province, Peninsular Thailand. This lowland species belongs to the G. foxi species group and can be distinguished from congeners by its carapace, male pleon and male first gonopod features. This brings to three the number of Geosesarma species now known from Thailand. The other member of G. foxi species group that previously record in Peninsular Thailand, G. serenei is discussed.
Raffles Bulletin of Zoology, Oct 14, 2022
A new species of the gecarcinucid crab genus Phricotelphusa Alcock, 1909 is described from a moun... more A new species of the gecarcinucid crab genus Phricotelphusa Alcock, 1909 is described from a mountain in Phatthalung, Peninsular Thailand. The new species is arboreal and has very long ambulatory legs and superficially resembles P. aedes from Nakhon Si Thammarat, Peninsular Thailand, but can easily be distinguished by live colouration, carapace features, as well as structures of the epistome and male first gonopod. This is the first report of an arboreal freshwater crab in Thailand.
Fig. 7. A, E, Terrapotamon thungwa n. sp., holotype male (44.6 × 35.0 mm) (ZRC 2016.0595), Satun,... more Fig. 7. A, E, Terrapotamon thungwa n. sp., holotype male (44.6 × 35.0 mm) (ZRC 2016.0595), Satun, Thailand; C, T. thungwa n. sp., paratype female (46.1 × 37.2 mm) (ZRC 2016.0596), Satun, Thailand; B, D, F, T. longitarsus Lheknim & Ng, 2016, holotype male (47.4 × 38.6 mm) (ZRC 2016.0161), Satun, Thailand. A, B, dorsal view of carapace; C, D, frontal view of cephalothorax; E, F, outer view of right major chela.
FIGURE 8. Lithoselatium kusu Schubart, Liu & Ng, 2009. Paratype male (25.1 x 22.8 mm) (ZRC 2009.0... more FIGURE 8. Lithoselatium kusu Schubart, Liu & Ng, 2009. Paratype male (25.1 x 22.8 mm) (ZRC 2009.0569). A, dorsal overall view; B, anterior thoracic sternum and male abdomen; C, dorsal view of dactylar finger of right chela showing tubercles.
FIGURE 6. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140).... more FIGURE 6. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140). A, anterior thoracic sternum and male abdomen; B, posterior thoracic sternum and male abdomen. Abbreviation: s8 = sternite 8.
FIGURE 3. Lithoselatium tantichodoki new species. Colours in life. A, paratype ovigerous female (... more FIGURE 3. Lithoselatium tantichodoki new species. Colours in life. A, paratype ovigerous female (18.8 x 16.6 mm) (PMBC 25380); B, paratype juvenile female (12.6 x 11.0 mm) (PMBC 25379).
FIGURE 2. Lithoselatium tantichodoki new species. Colour in life. Holotype male (25.0 x 22.9 mm) ... more FIGURE 2. Lithoselatium tantichodoki new species. Colour in life. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140). A, overall view; B, frontal view and chela.
FIGURE 1. Map of Surat Thani region where Lithoselatium tantichodoki new species, was collected. ... more FIGURE 1. Map of Surat Thani region where Lithoselatium tantichodoki new species, was collected. The stars represent the type localities.
Two species of deep-water spider crabs, Cyrtomaia suhmii Miers, 1886, and Platymaia alcocki Miers... more Two species of deep-water spider crabs, Cyrtomaia suhmii Miers, 1886, and Platymaia alcocki Miers, 1886, based on the materials of the BIOSHELF Project (1996–2000) are recorded for the first time from Thailand. It is also the first record of these two genera from the Andaman Sea coast of Thailand. Adult and juvenile forms of C. suhmii collected from the same locality confirm that C. curviceros Bouvier, 1915, is a junior synonym, the characters previously used to separate them explained by size and age.
FIGURE 5. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140).... more FIGURE 5. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140). A, dorsal view of right chela showing pectinated ridge; B, dorsal view of dactylar finger of right chela showing tubercles.
FIGURE 7. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140).... more FIGURE 7. Lithoselatium tantichodoki new species. Holotype male (25.0 x 22.9 mm) (ZRC 2009.1140). A, left third maxilliped (denuded); B–D, left G1 (denuded); E, left G2.
Genus <i>Pseudopalicus</i> Moosa & Serène, 1981 <i>Pseudopalicus</i> Moos... more Genus <i>Pseudopalicus</i> Moosa & Serène, 1981 <i>Pseudopalicus</i> Moosa & Serène, 1981: 35.— Castro, 2000: 448; 2010: 83. TYPE SPECIES.— <i>Palicus serripes</i> Alcock & Anderson, 1895, by original designation.
<i>Pseudopalicus bidens</i> new species (Figs. 1–4) HOLOTYPE.—Male (8.1 × 10.4 mm), B... more <i>Pseudopalicus bidens</i> new species (Figs. 1–4) HOLOTYPE.—Male (8.1 × 10.4 mm), BIOSHELF St. C 5, western coast of Thailand, Andaman Sea (9 °00'N, 97 ° 25 'E), Agassiz trawl, 215–230 m, coll. C. Aungtonya &amp; V. Vongpanich, 0 2.02. 2000 (PMBC 26820). PARATYPES.— 1 male (7.8 ×10.0 mm), BIOSHELF st. L 6, west coast of Thailand, Andaman Sea (6 ° 45 'N, 98 °06'E), Agassiz trawl, 303–313 m, coll. C. Aungtonya &amp; V. Vongpanich, 23.02. 2000 (PMBC 26821).— 1 male (6.2 × 7.9 mm), BIOSHELF st. I 6, west coast of Thailand, Andaman Sea (7 ° 30 'N, 97 ° 50 'E), rectangular dredge, 299–301 m, coll. C. Aungtonya &amp; V. Vongpanich, 9.11. 1999 (PMBC 26819). TYPE LOCALITY.— BIOSHELF st. L 6, Andaman Sea coast of Thailand, (6 ° 45 'N, 98 °06'E), 303– 313 m. ETYMOLOGY.—The name <i>' bidens</i> ' (Latin for "two-toothed) refers to the appearance of the anterolateral borders of the carapace, which seems to be armed with only two teeth on each side because of the first two teeth are much larger than the last two. DISTRIBUTION.—Known only from the type locality on the Andaman Sea coast of Thailand. DIAGNOSIS.—Carapace (Figs. 2 A–B, 4 A) with 4 anterolateral teeth on each side, the first 2 teeth are broad, slightly pointed, first larger than second, much larger than the last 2 teeth. Dorsal surface of carapace with large granular bosses, 12 of which form an almost straight row across branchial, metagastric regions; posterior border with 6 low, elongated tubercles. Supraorbital borders each with 2 slightly rounded to triangular lobes; inner border slightly higher than outer. Outer surfaces of cheliped propodi (Fig. 2 D) with scattered thin, rounded tubercles of various sizes. Dactyli of walking legs (P 2–4) slender, with posterior borders entire. Abdomen of mature males (Fig. 3 C) with all segments free, one complete transverse ridge along each segment 1-3, incomplete ridge along median portion of segment 4. G 1 (Figs. 3 D–F, 4 B–D) with sinuous basal parts with thick, mammillate tooth near extremity of ventral surface; each di [...]
Fig. 4. Live coloration of Nakhonsimon ramromensis, new genus and new species, holotype, male, 31... more Fig. 4. Live coloration of Nakhonsimon ramromensis, new genus and new species, holotype, male, 31.8 × 24.6 mm, PSUNHM 211514-333-0005.
Fig. 2. Nakhonsimon ramromensis, new genus and species, holotype, male, 31.8 × 24.6 mm, PSUNHM 21... more Fig. 2. Nakhonsimon ramromensis, new genus and species, holotype, male, 31.8 × 24.6 mm, PSUNHM 211514-333-0005. A, left third maxilliped; B, ventral view of left G1; C, dorsal view of left G1; D, left G2. Scale bars = 2.0 mm.
Fig. 3. Vulvae position of Nakhonsimon ramromensis, new genus and species, paratype, female, 17.8... more Fig. 3. Vulvae position of Nakhonsimon ramromensis, new genus and species, paratype, female, 17.8 × 14.4 mm, PSUNHM 211514- 333-0006. Scale bar = 2.0 mm
Promdam, Rueangrit, Nabhitabhata, Jaruwat, Ng, Peter K. L. (2014): Nakhonsimon ramromensis, a new... more Promdam, Rueangrit, Nabhitabhata, Jaruwat, Ng, Peter K. L. (2014): Nakhonsimon ramromensis, a new genus and species of freshwater crab (Crustacea: Decapoda: Brachyura: Potamidae) from Nakhon Si Thammarat, Peninsular Thailand. Raffles Bulletin of Zoology 62: 496-500
Fig. 1. Nakhonsimon ramromensis, new genus and species, holotype, male, 31.8 × 24.6 mm, PSUNHM 21... more Fig. 1. Nakhonsimon ramromensis, new genus and species, holotype, male, 31.8 × 24.6 mm, PSUNHM 211514-333-0005. A, dorsal view; B, frontal view; C, ventral view.
FIGURE 3. Pseudopalicus bidens new species. A – B, Holotype male (8.1 × 10.4 mm) (PMBC 26820); C ... more FIGURE 3. Pseudopalicus bidens new species. A – B, Holotype male (8.1 × 10.4 mm) (PMBC 26820); C – F, Paratype male (7.8 × 10.0 mm) (PMBC 26821). A, ventral view; B, epistome, frontal view; C, male abdomen; D, left G 1, dorsal view; E, left G 1, apex, ventral view; F, left G 1, apex, lateral view (inner side).
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Papers by Rueangrit Promdam