Typhlocarcinus craterifer Rathbun, 1914

Ng, Peter K. L., Devi, Suvarna & Kumar, Appukuttannair Biju, 2017, Typhlocarcinus kerala, a new species of rhizopine crab from southwestern India, and the identity of T. craterifer Rathbun, 1914 (Crustacea: Brachyura: Pilumnidae), Zootaxa 4272 (1), pp. 131-141: 132

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Typhlocarcinus craterifer Rathbun, 1914


Typhlocarcinus craterifer Rathbun, 1914 

( Figs. 1View FIGURE 1, 2View FIGURE 2, 7A –CView FIGURE 7)

Typhlocarcinus craterifer Rathbun, 1914: 147  ; Tesch 1918: 207; Serène 1968: 92; Ng 1987a: 89; Ng et al. 2008: 144. (not Serène 1964: 217, pls. 18C, 19A)

Material examined. Typhlocarcinus craterifer Rathbun, 1914  : holotype female (13.4 × 9.5 mm) ( USNM 46397View Materials), station 5213, Destacado Island , east of Masbate Island, Philippines, 12°15'N 123°57'30"E, 80 fathoms, collGoogleMaps  . U.S. Bureau of Fisheries steamer R.V. Albatross, 20 April 1908  .

Diagnosis. Carapace transversely subovate, width 1.41 times length; dorsal surfaces smooth, covered with short pubescence on surface, with longer plumose setae on lateral and frontal margins, regions demarcated, Hshaped gastric and cardiac grooves deep, distinct, surface adjacent appears crenulated in adult; anterolateral margin strongly convex, lined with small granules, appears entire except for low granulated tooth at junction with posterolateral margin; posterolateral margins subparallel, margin and surface with small rounded granules, median part with patch of raised granules resembling low lobe ( Figs. 1View FIGURE 1 A, B, 7A). Frontal margin deflexed downwards, barely visible from dorsal view; bilobed with distinct median cleft, margin of each lobe distinctly convex ( Figs. 1View FIGURE 1 B, C, 7B). Orbit ovate; eyes small, with stout peduncle, small cornea, fused to carapace, immovable ( Fig. 1View FIGURE 1 C). Posterior margin of epistome gently convex, not clearly divided into lobes ( Fig. 1View FIGURE 1 C). Outer surface of ischium, merus and exopod of third maxilliped with scattered small granules; anteroexternal angle of merus rounded; exopod slender ( Fig. 7CView FIGURE 7). Chelipeds stout, carpus with low subdentiform inner angle; margins of carpus and merus with numerous granules and dense setae; chela stout, dorsal and ventral margins with rounded granules and dense setae; cutting edges of propodal finger with prominent broad teeth ( Figs. 1View FIGURE 1 A, 2D –F). Ambulatory legs moderately short; propodus of last leg relatively long; dactylus of last leg straight from dorsal view, slightly curved on mesial view ( Figs. 1View FIGURE 1 A, 2G, H). Male not known. Female pleon ovate; telson triangular, elongate ( Fig. 1View FIGURE 1 D). Vulva relatively small, rounded ( Fig. 2View FIGURE 2 C).

Colour. Not known.

Remarks. See General Discussion for taxonomic comments.


Smithsonian Institution, National Museum of Natural History














Typhlocarcinus craterifer Rathbun, 1914

Ng, Peter K. L., Devi, Suvarna & Kumar, Appukuttannair Biju 2017

Typhlocarcinus craterifer

Serene 1968: 92
Serene 1964: 217
Tesch 1918: 207
Rathbun 1914: 147