LABARQUE ET AL.: REDESCRIPTION OF ILODESMUSMARGARITIFERUS 
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Materials And Methods 
The examined materials are deposited in the following institutions: Museum fiir Naturkunde, 
Universitat Humboldt Berlin, Gemiany (ZMB, J. Dunlop); The Louis Agassiz Museum for Com¬ 
parative Zoology, Massachusetts, USA (MCZ, G Giribet); California Academy of Sciences, Cali¬ 
fornia, USA (CAS, C. Griswold); Museum of Natural History, University of the Philippines Los 
Banos, Laguna, Philippines (UPLB, 1. Lit, Jr.). 
Morphological observations were made using a Leica MZ125 and a Motic SMZ-143 Series 
stereomicroscopes, all of them with a camera lucida. Pictures were taken with a Nikon DXM1200 
digital camera mounted on a Leica DM4000 M compound microscope, and with a Leica DEC 500 
digital camera mounted on a Leica M216 stereoscopic microscope. Extended focal range images 
were composed with Helicon Focus 4.70 Pro and 5.30 (Khmelik et al. 2006). 
Scannmg electron micrographs (SEM) were taken under high vacuum with a LEO 1450VP 
after paper diying and gold-platinum coating. Measurements were taken with a micrometric ocu¬ 
lar and are given in millimeters. The gnathochilarium, head capsule, antennae, mandibles, 
gonopods and legs (feeding and walking) were dissected with fine-pointed forceps. Preparations 
were cleaned using a fine brush and a Bransonic 151 OR MT ultrasonic cleaner for 10-20 minutes. 
Excess head tissues were digested overnight with a contact lens cleaner solution (ReNu®). Prepa¬ 
rations were mounted on adhesive copper tape (Electron Microscopy Sciences, EMS 77802) 
affixed to a stub for SEM examination. 
General tenninology follows Attems (1899), Hoffinan (1980) and Mesibov (2012), for 
mandibles, Seminyuk et al. (2011); see Hoffman (2001:406) for a discussion on the gonopod ter¬ 
minology and underlying homology assumptions. Abbreviations used throughout the text: Habi¬ 
tus: col, collum; epp, epiproct; hyp, hypoproct; pp, paraproct; tsn, telson. Head: cly, clypeus; to, 
tomosvary organ; vs, vertigial sulcus. Gnathochilarium and Mandible: pi: pectinate lamellae; et, 
external tooth; it, internal teeth; men, mentum; mp, molar plate; 11, lingual lobe; stp, stipites. Leg: 
eox, coxa; fern, femur; tar, tarsus; tib, tibia; por, postfemur; prf, prefemur. Gonopod: enl, eannula; 
gex, gonopodcoxa; pg, prostatic groove; sol, solenomere; tbtr, tibiotarsus; tub, tubereles. Epigyne: 
epi, epigyne; pro, prong; 2^^, seeond body ring, 3’"^, third body ring; fourth body ring. 
Results 
Taxonomy (taken in part from Hoffman 1980, 1998; Shelley 2003; Jeekel 2007; Shear 2011; 
Shelley and Martinez-Torres 2013) 
Order Polydesmida Pocock, 1887 
Suborder Leptodesmidea Brolemann, 1916 
Superfamily Platyrhacoidea Pocock, 1895 
Family Platyrhacidae Pocock, 1895 
Tribe Erythrhacini Jeekel, 2007 
Genus Ilodesmus Cook, 1896 
Ilodesmus margaritifems (Gervais, 1836) 
Figures 1-8 
Polydesmus margaritifems Gervais, 1836:379. Female holotype from Philippmes, Luzon Island, Manila, type 
specimen not examined. 
Polydesmus margaritifems:- Gervais, 1837:44 non vidi. 
