Phymodius monticulosu

Ng, Peter K. L., 2000, The Indo-Paci ® c Pilumnidae XII. On the familial placement of Chlorodiella bidentata (Nobili, 1901) and Tanaocheles stenochilus Kropp, 1984 using adult and larval characters with the establishment of a new subfamily, Tanaochelinae (Crustacea: Decapoda: Brachyura), Journal of Natural History 34, pp. 207-245 : 216-219

Phymodius monticulosu s ( Dana, 1852)

(®gures 8a±e, 9a±c, 10a, b, 11a, b)

Material examined. Thailand: Phuket region, one m (ovigerous) (spent crab and zoea I, NHM, reg. no. 1998.601), hatched 18 March 1973, coll. S. Lindoez, 12 March 1973 .

Zoea I description. Carapace (®gure 8a, d, e): dorsal spine long and curved distally with small tubercules, nearly twice as long as rostral spine; rostral spine much shorter than dorsal spine, approximately equal in length to protopod of antenna, with three spines distally; lateral spines short and straight; one pair of posterodorsal setae; ventral margin without setae; eyes sessile.

Antennule (®gure 8a, b): uniramous, endopod absent; exopod unsegmented with two broad, long, two shorter, slender terminal aesthetascs and one terminal setae.

Antenna (®gure 8a, c): protopodal process distally spinulate, approximately equal in length to rostral spine; endopod reduced; exopod rudimentary, unsegmented with two unequal terminal setae.

Mandible: endopod palp absent.

Maxillule (®gure 9a): coxal endite with seven setae; basial endite with ®ve setal processes and two small teeth; endopod two-segmented, proximal segment with one seta; distal segment with six (2 subterminal, 4 terminal) setae; exopod seta absent. Maxilla (®gure 9b): coxal endite bilobed with 4 +4 setae; basial endite bilobed with 5 +4 setae; endopod bilobed, with 3 +5 (2 subterminal and 3 terminal) setae; exopod (scaphognathite) margin with four setae and one long distal stout process.

First maxilliped (®gure 10a): coxal segment without setae; basis with 10 setae arranged 2,2,3,3; endopod ®ve-segmented with 3,2,1,2, 5 (1 subterminal and 4 terminal) setae respectively; exopod two-segmented, distal segment with four long terminal plumose natatory setae.

Second maxilliped (®gure 10b): coxa without setae; basis with four setae; endopod three-segmented, with 1,1,6 (3 subterminal and 3 terminal) setae respectively; exopod two-segmented, distal segment with four long terminal plumose natatory setae.

Third maxilliped: absent.

Pereiopods: absent.

Abdomen (®gure 11a, b): ®ve somites; somite 2 with one pair of dorsolateral processes directed anteriorly; somite 3 with one pair of dorsolateral processes directed ventrally; somites 1±2 with rounded posterolateral processes and 3±5 with short posterolateral spinous processes; somite 1 without setae; somites 2±5 with one pair of posterodorsal setae; pleopod buds absent.

Telson (®gures 9c, 11a, b): each fork long, gradually curved distally; one large and one small lateral spine; one large dorsal medial spine; posterior margin with three pairs of stout spinulate setae.