Odontonia katoi ( Kubo, 1940 )

Fransen, Charles H. J. M., 2006, On Pontoniinae (Crustacea, Decapoda, Palaemonidae) collected from ascidians, Zoosystema 28 (3), pp. 713-746 : 717

Odontonia katoi ( Kubo, 1940)

Pontonia katoi Kubo, 1940: 55 , figs 21-23 (type locality: off Shimoda, Shizuoka Prefecture, Japan, in branchial cavity of ascidian Halocynthia ).

Odontonia katoi – Fransen 2002: 339-352, figs 220-228, pls 15, 16.

MATERIAL EXAMINED. — Philippines. Mindanao, Davao, N side Talikud Island, Angel Cove , 6°57.59’N, 125°40.76’E, in Polycarpa captiosa (Sluiter, 1885) ( MNHN S1 POL. B 362 , see Monniot & Monniot 2001: 324), 27.III.1996, coll. CRRF, 1 ovigerous ♀ pocl. 3.0 mm ; 1 ♂ pocl. 2.8 mm (MNHN-Na 15231).

Tonga Islands. 20°59.80’S, 175°12.85’W, 7 m, in Polycarpa sp. , 19.XI.1997, coll. CRRF, 1 ovigerous ♀ pocl. 2.8 mm ; 1 non-ovigerous ♀ pocl 3.3 mm; 1 ♂ pocl. 2.8 mm (MNHN-Na 15235).

Loyalty Islands. Lifou “près du wharf”, 0-3 m, in Polycarpa

Pontoniinae ( Crustacea, Decapoda ) from ascidians cryptocarpa (Sluiter, 1885) , data unknown, 1 ovigerous ♀ pocl. 3.1 mm; 1 ♂ pocl. 3.3 mm (MNHN-Na 15234).

New Caledonia. In Polycarpa aurata (Quoy & Gaimard, 1834), 1987 , 1 ovigerous ♀ pocl. 3.4 mm ; 1 ♂ pocl. 3.8 mm (MNHN-Na 15229).

Maldives. N Malé Atoll, Feydhoo Findhu Island, 04°12.88’N, 73°29.27’E, 2 m, in Pyura gangelion (Savigny, 1816) ( MNHN S2 PYU 383, identified by Monniot & Monniot 2001: 344, identification on label by Monniot & Monniot as Pyura albanyensis Michaelsen, 1927 ), coll. CRRF, 1 ovigerous ♀ pocl. 2.8 mm; 1 ♂ pocl. 1.7 mm (MNHN-Na 15230).

Moçambique. Ibo Island, outer reef, 16.XI.1995, in Polycarpa nigricans (Heller, 1878) , 1 ovigerous ♀ pocl. 1.7 mm (MNHN-Na 15232). — Falaise de Matemo, 1995, in Polycarpa nigricans , 1 specimen pocl. 1.5 mm (MNHN-Na 15233).

Red Sea. In Pyura gangelion (Savigny, 1816), 1897 , coll. H. Coutière,? 1 ♂ pocl. 3.4 mm; 1 ovigerous ♀ pocl. 4.1 mm (MNHN-Na 8229).

REMARKS

The unguis of ambulatory pereipods has three to five distal scales and one to three denticles on the flexor margin of the corpus. The ambulatory pereiopods look slightly more slender than in the typical form from Indonesian waters. Material from New Caledonia has one to three scales on the unguis of the ambulatory pereiopods and one to three denticles on the corpus. Material from the Maldives has the unguis of the ambulatory pereiopods with one to three scales and the distal part of the flexor margin of the corpus with only one denticle. The ovigerous female from Moçambique has the third left pereiopod with the distal flexor margin of the corpus of the dactylus with one tooth, the unguis has a row of about six distal scales. Other specimens from Moçambique have four small denticles on the distal part of the flexor margin of the corpus of the third pereiopod; the unguis has a row of about eight small scales. This is here regarded as intraspecific variation.

Odontonia katoi is known from various localities in the Indo-West Pacific. It is now recorded for the first time from the Red Sea, Moçambique, Maldives, Loyalty Islands, and Tonga Islands.