R. Houart 
Siratus evelynae n.sp. 
Text Fig. 1. Spiral cords terminology (paratype MNHN) 
SYSTEMATICS 
Family MURLCIDAE Rafinesque, 1815 
Subfamily MURICINAE Rafinesque, 1815 
Genus Siratus Jousseaume, 1880 
Type species, by original désignation: Purpura Sirat 
"Adanson" Jousseaume, 1880 (= Murex senegalensis 
Gmelin, 1791), Recent, Brazil. 
Siratus evelynae n. sp. 
Text Figs 1-2, Figs 1-3 
Type material. Philippines, Digos, Davao del sur, 
coral rubble, 150-200 m, by tangle nets, holotype 
IRSNB IG.32073/MT2574. 
Paratypes: Philippines, Balut Island, south of 
Mindanao, in 400 m, by tangle net, 1 MNHN IM- 
2010-19527; Digos, Davao, in 400 m, by tangle nets, 
2 RH coll.; Davao, coral rubble, sandy mud, 200-400 
m, by tangle net, 1 RH coll, 1 EGS coll. 
Distribution. Currently only known trom the type 
material: Philippines, south of Mindanao, live in 150- 
400 m, by tangle nets. 
Description. Shell medium sized foi the genus, up to 
112 mm in height (paratype EGS). Height/width ratio 
2.0-2.2. Slender, biconical, broadly ovate, heavy, very 
weakly spinose, tuberculate. Subsutural ramp broad, 
strongly sloping, convex. Creamy white or light tan 
with tan, brown or dark brown spiral cords. Aperture 
white. 
Spire high, acute, with a teleoconch of 8 broadly 
convex, weakly shouldered, nodose whorls. Suture 
weakly adpressed. Protoconch unknown. 
Axial sculpture of teleoconch whorls consisting of 
high, broad, rounded ribs and high, narrow, rounded 
varices. Two first teleoconch whorls eroded. Three 
varices and two intervarical broad ribs from third to 
last whorl. Last whorl occasionally with two broad 
and one narrow ribs on last portion of whorl, between 
second and apertural varix. Spiral sculpture of low, 
narrow, primary, secondary, tertiary cords and narrow 
threads. Spiral sculpture of shoulder ramp of last 
teleoconch whorl consisting of adis, IP and abis with a 
tertiary cord between each. Convex part of last 
teleoconch whorl of PI (shoulder cord), t, si, t, P2, t, 
s2, t, P3, t, s3, t, P4, s4, P5, s5, P6, t, s6, t, ABP, abs, 
MP, ms, ABP, abs. Few threads and secondary cords 
occasionally of same strength and height; occasionally 
with a few additional narrow threads. 
Aperture moderately large, roundly ovate. Columellar 
lip naiTOw, smooth, with strong, low pariétal tooth at 
adapical extremity. Lip adhèrent. Anal notch deep, 
narrow. Outer lip erect, crenulated with numerous, 
elongate, narrow denticles within, many of them split. 
Siphonal canal long, 39-43% of total shell length., 
broad adapically, abruptly tapered and very narrow 
abapically, weakly recurved dorsally. 
Operculum dark brown, ovate, inverted tear-shaped, 
with apical nucléus and 9 or 10 concentric ridges at 
outer surface. Attached surface with 10 growth lines 
and broad, callused rim. 
Radula unknown. 
Figures 1-15 
1-3. Siratus evelynae n. sp. 
1-2. Philippine, Digos, Davao del sur, coral rubble, 150-200 m, holotype IRSNB IG.32073/MT2574,83.3 mm; 
3. Balut Island, south of Mindanao, in 400 m, paratype MNHN IM-2010-19527, 81.7 mm 
4-7. Siratus pliciferoides (Kuroda, 1942). 4-5. Northeast of Taiwan, RH, 134 mm; 6. Philippines, Bohol, RH, 
128.4 mm; 7. Japan, Tosa, RH, 113.5 mm; 8-10. Siratus pliciferoides "form" propinquus Kuroda & Azuma, 
1961; 8-9. Northeast of Taiwan, RH, 106.4 mm; 10. West Australia, Port Hedland, RH 93 2 mnr 11-12 Siratus 
pliciferoides "form" hirasei Shikama, 1973, Japan, Minabe, RH, 96.1 mm; 13-14. Siratus pliciferoides "form" 
vicdani Kosuge, 1980, Philippines, Mactan, RH, 38.4 mm; 15. Siratus pliciferoides (Kuroda 19421 Philippines, 
juvénile, RH, 38.2 mm. h 
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