Parathelphusa pallida ( Schenkel, 1902 )

Ng, Oliver K. S. Chia Peter K. L., 2006, The Freshwater Crabs Of Sulawesi, With Descriptions Of Two New Genera And Four New Species (Crustacea: Decapoda: Brachyura: Parathelphusidae), Raffles Bulletin of Zoology 54 (2), pp. 381-428 : 395-397

publication ID	https://doi.org/ 10.5281/zenodo.13245646
persistent identifier	https://treatment.plazi.org/id/03DF1C3D-FFA9-FFBB-7C81-F948FCF8FDD1
treatment provided by	Felipe
scientific name	Parathelphusa pallida ( Schenkel, 1902 )
status

Treatment

Parathelphusa pallida ( Schenkel, 1902) View in CoL

( Figs. 12 View Fig , 13 View Fig , 14 View Fig F-J)

Potamon (Potamonautes) celebensis var. pallidum Schenkel, 1902:

530. Potamon (Potamonautes) celebensis var. annulipes Schenkel, 1902:

530. Potamon celebense var. pallida - Roux, 1904: 565. Potamon celebense var. annulipes - Roux, 1904: 565. Potamon (Potamonautes) celebensis pallidus - Rathbun, 1905: 199. Potamon (Potamonautes) celebensis annulipes - Rathbun, 1905: 199. Parathelphusa (Meostelphusa) pallida - Bott, 1970c: 128, Pl. 24

Figs. 83, 84, Pl. 32 Fig. 4 View Fig .

Material examined. – Lectotype: male (23.9 x 18.3 mm) ( NMB 23 View Materials VIb), Kalaena tributaries, Central Sulawesi , coll. Gesch & Sarasin, 1901. Others: 1 female ( NMB 23 View Materials Ia) (lectotype of Potamon (Potamonautes) celebensis var. annulipes Schenkel, 1902 ), Tamarolowi, Lake Poso , ca. 550m, Central Sulawesi , coll Gesch & Sarasin, 1901; 15 males, 8 females ( ZRC 2000.1691 View Materials ), 2 males, 2 females ( MZB 1489 View Materials ), Lake Matano , small river west of Soroaka , near Pontada, South Sulawesi , 2 ° 31'19.7"S 121 ° 20'32.6"E, coll. C. D. Schubart et al., 26 Jan.2000; 4 males, 4 females, 1 juvenile ( ZRC 2000.2577 View Materials ), Lake Towuti , cold tributary of Lake Towuti , about 7 km south of Timampu , Tandjung Balaote (station 7), South Sulawesi , coll. M. Kottelat, 12 Jul.1988; 7 males, 4 females ( ZRC 2000.2578 View Materials ), 2 males, 2 females ( MZB 1497 View Materials ), Sungai Balambano , about 500m above Balambano , road from Malili to Soroako , South Sulawesi , 2 ° 37'40"S 121 ° 12'50"E, coll. M. Kottelat, 10 Feb.1995; 1 female ( ZRC 1990.489 View Materials ), Lubang Pangngi , Langa China, Benge , South Sulawesi , coll. D. Rigal, 25 Jul.1989; 6 males, 1 female ( ZRC 2000.2579 View Materials ), unnamed tributary entering Sungai Larona from the South , about 300m downriver of bridge on road to power plant, South Sulawesi , 2 ° 39'35"S 121 ° 14'50"E, coll. M. Kottelat, 12 Feb.1995; 26 males, 14 females ( ZRC 2000.2580 View Materials ), Sungai Balambano , about 500 m above Balambano , on road from Malili to Soroako , South Sulawesi , coll. M. Kottelat, 19 Jun.1988; 1 female ( ZRC 2000.2581 View Materials ), Lake Towuti , cold tributary of Lake Towuti , about 3 km South of Timampu, Tandjung Balaote (station 4), South Sulawesi , coll. M. Kottelat, 22 Jun.1988; 3 males, 1 female ( ZRC 2000.2582 View Materials ), Lake Mahalona , southwest coast, South Sulawesi , coll. M. Kottelat & A. Werner, 16 Mar.1989; 1 female ( MZB 1401 View Materials ), Mount Watuivila, forest at 450m a.s.l., South Sulawesi, 3 ° 47'S 121 ° 34'E, coll. S. Kahono, Sep.1989. GoogleMaps

Diagnosis. – Carapace convex, dorsal surfaces smooth; cervical groove shallow, but distinct; H-shaped central depression pronounced. Epigastric and postorbital cristae continuous, sharp, subparallel to frontal margin; outer edge of cristae not reaching anterolateral margin, stopping between base of first and second epibranchial teeth. Front sinuous, entire, median point with distinct depression; frontal median triangle distinct, lateral and dorsal ridge distinct and complete. Anterolateral margin granulated, external orbital angle broadly triangular, outer margin almost straight, about 2.7 times length of inner margin, first and second epibranchial teeth very low almost continuous with anterolateral margin. Posterolateral regions lined with distinct oblique striae. Suture between thoracic sternites 2 and 3 complete, almost straight. Palm of chelipeds slightly inflated, fingers shorter than palm. Ambulatory legs relatively long, second pair longest. Dorsal margin of merus slightly cristate, without distinct subterminal spine. Male abdomen reaching imaginary line joining anterior edges of cheliped bases, T-shaped, segment 6 distinctly longer than segment 7; lateral margins of segment 7 gently concave; lateral margins of segment 6 subparallel, gently sinuous. G1 relatively stout, curved slightly outwards, directed upwards, outer margin very gently sinuous along distal two-thirds, proximal part with slight cleft; distal part tapering. G2 with well developed distal segment, about 0.5 times length of basal segment.

Distribution. – Central and South Sulawesi, especially around the Malili Lakes System (Lake Towuti, Lake Mahalona, Lake Matano) up to the Poso area.

Remarks. – Schenkel (1902) described Potamon

(Potamonautes) celebensis var. pallidum from Kalaena on the basis of two male specimens. Bott (1970c) in his monograph designated one male (NMB 23VIb) as the lectotype. Bott (1970c) also regarded Parathelphusa tenuipes , P. linduensis and P. possoensis as junior synonyms of P. pallida . However, on examining the type specimens of the respective taxa and additional specimens, we find that P. tenuipes , P. linduensis and P. possoensis should be regarded as valid species (see discussion for these species). Parathelphusa annulipes on the other hand, after examining the type specimens, is similar to P. pallida , with their external morphologies virtually identical. It is here regarded as a junior synonym of P. pallida , as had been indicated by Bott (1970c).