LABARQUE ET AL.: REDESCRIPTION OF ILODESMUS MARGARITIFERUS 
431 
9048615 [$], CASENT 9017860 [c?]); and $, same locality as previous specimens, 
6-8.May.2011, V. San Juan, M. Yngente, J. Vicarizas and S. De Guzman cols., deposited in UPLB 
(MYR 00134-00137). 
Diagnosis. — Males of/, margantiferus resembles those of/, bakeri by having the acropodite 
of gonopod with two branches (solenomere and tibiotarsus), solenomere extended anteriorly and 
curved postero-ventrally and tibiotarsus pointing dorsally with tubercles on posterior edge; but /. 
margaritifenis can be distinguished by the solenomere secondarily recurved dorsally (Figs. 7 A-D, 
8 A-D) and by the tibiotai*sus with four tubercles (Figs. 7 C-D, 8 A-D), while /. bakeri lack a sec¬ 
ond curvature in the solenomere and have five tubercles in the tibiotarsus ( Wang, 1951, fig. 77). 
Redescription. — Color fresh specimen: Head, collum and dorsum brownish black (Figs. 1 
A-B). Collum with four transverse rows of yellow tubercles (Fig. 1 B). Paranota yellow. Antennae 
pale orange, 6^^ and last segments dark orange (Figs. 2 A-B). Coxa and prefemur pale yellow, rest 
of leg segments pale orange (Figs. 1 C-D). Prozonite brownish black dorsolaterally, dark orange 
ventrally (Figs.l B-C, E). Metazonite brownish black with tluee transverse rows of yellow tuber¬ 
cles, posterior row conspicuous (Figs. 1 B-C, E). Stemite pale orange (Fig. 1 D). Telson brownish 
black with pale orange borders dorsally (Fig. 1 C), and pale orange ventrally (Fig. 1 D). Epiproct, 
paraproct and hypoproct dark orange (Fig. 1 D). Head and antennae: Head tuberculate, frons 
roughly at a 45 degree angle to the ground, covered by the collum with antennae and vertex visi¬ 
ble dorsally (Figs. 1 A-B, E). Collum almond shaped (Figs. 1 A-B). Vertigial sulcus present, deep¬ 
est at vertex, which extends from vertex to a point just above antennae (Figs. 1 A-B, 2 A), with a 
pair of lateral short seta. Antennal sockets oval (Fig. 2 A). Interantennal distance and socket diam¬ 
eter almost equal (Figs. 1 A, 2 A). Pair of Tomosvaiy organs behind antennal sockets, ovoid with 
longitudinal central ridge (Figs. 2 A,E). Border surface with several pores randomly distributed, 
internal surface smooth without pores (Figs. 2 F-G). Pores with single hole bordered by a suture 
(Fig. 2 G). Clypeus within a distinct trapezoid marked by four setae. Labrum with five supralabral 
and 15 to 17 sublabral setae tufts distributed transversally. Each setae tuft with eight to 14 setae 
(Figs. 2 H-I). Labrum with two teeth (Fig. 2 H). Labral pores alveolar with several holes, distrib¬ 
uted irregularly (Fig. 2 J). Antennal segment length foimula: 7 + 8<l<2<3 = 4 = 5<6(Figs. 1 
A, 2 B). Antennae with brush-tipped twisted setae (Figs. 2 C-D). Antennal surface with discrete 
cells (texture squamose) and several single pores, easily seen in the last segment. 6* segment with 
disperse distal ventral filiform setae. Last segments (7 + 8) with alveolar pores between the four 
sensoiy cones. Mandibles and Gnathochilanum: Mandibles with one external blunt tooth, and four 
internal blunt teeth forming a plate (Figs. 3 A-B). Pectinate lamellae with four rows of acute and 
long bristles (Fig. 3 C). Molar plate serrated forming the anterior fringe (Figs. 3 B, E). Membra¬ 
nous surfaces with spicules between pectinate lamellae and molar plate (Figs. 3 C-D). Gnathochi- 
larium with several dorsal alveolar surfaces (Fig. 4 A). Alveolar patches fonned by relatively big 
circulai* pits found on distal center of mentum, proximal inner sides of lingual lobes, and proximal 
inner and distal median sides of the stipites. Mentum heai't-shaped, lingual lobes parallel thin 
plates, and stipites concave and distally wide plates (Fig. 4 A). Ventral surface of gnathochilarium 
with long filifonn setae (Fig. 4 B). Anterior tips of palps with sensoiy cones (Figs. 4 C-D). Stip¬ 
ites and borders of lingual lobes with pair of spoon-like concavities transverse to midline axis (Fig. 
4 A). Anterior tips of lingual lobes with peg in a semicircular depression (Figs. 4 E-F). Body rings 
(diplosegments): Surface sculpture of prozonite with spicules. Metazonite with three transvei*se 
tuberculate rows (Fig. 1 B), with 8-12 tubercles per row, posterior row conspicuous. Paranota 
extended posteriorly (Figs. 1 C, G), except for second and third segments which are produced ante¬ 
riorly (Fig. 1 B); with 5-9 marginal blunt tubercles and several anterior and posterior acute teeth 
(Figs. 5 A-C). Some metazonite tubercles have pores, especially marginal tubercles of paranota 
