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(Fabricius, 1798)

Carapace pubescent, with transverse granular lines on protogastric and mesogastric regions, epibranchial line interrupted at the cervical groove and across midline; front with 6 triangular subacute teeth; antero-lateral borders with 6 teeth, first and second smaller than the following ones and subequal; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Cheliped merus with 3 spinules on anterior border, posterior border smooth; carpus with a strong internal spine, outer border with 3 spines; palm with 4 spines on upper border. Merus of swimming leg with a subdistal posterior spine, propodus with 4-7 denticles on posterior border. (Türkay 1995)

Antennal flagellum excluded from orbital hiatus; median lobule of lateral part of lower border of orbit not dentiform; frontal teeth rounded; posterior border of cephalothorax curved, forming curved postero-lateral junction; 6 antero-lateral teeth, first antero-lateral tooth not truncate, second antero-lateral tooth about as large as first; granular ridges on carapace faint, but no distinct cardiac ridges; carpus of fifth leg without a spine; chelipeds not very granular. (Davie 1999)

Type locality: "Oceano Indico", probably from Tranquebar.
Range: South Africa - Scottburgh and Durban (Barnard, 1947, 1950); Madagascar - (Apel & Spiridonov, 1998), Nosy Bé, Tôlanaro and Toamasina (Crosnier, 1962); Oman - Dhofar (Apel & Spiridonov, 1998); Pakistan - Karachi (Alcock, 1899a, Apel & Spiridonov, 1998) India - Bimlipatam (Alcock, 1899a), Bombay (Chhapgar, 1957), Tranquebar (Apel & Spiridonov, 1998), Travancore; Sri Lanka (Apel & Spiridonov, 1998); Burma - Maungmagan, near Tavoy (Chopra & Das, 1937); Malaysia - Pinang (Alcock, 1899a); Japan - Shimoda, Ise Bay and Nagasaki (Sakai, 1939), Sagami Bay, Kii Minabe, and Yoron-jima (Sakai, 1976a), Kushimoto (Miyake, 1983); China - Guangxi, Guangdong, and Fujian (Dai & Yang, 1991); Taiwan - (Lin, 1949), T'ai-pei, Kaohsiung, Ping-tung, I-lan, and T'ai-tung Provinces (Huang & Yu, 1997); Thailand; Singapore (Nobili, 1903c); Philippines; Indonesia; New Guinea (Apel & Spiridonov, 1998); ?Tahiti.

Charybdis annulata