R. Houart & S. Gori 
Two new Favartia species from Masirah Island 
Axial sculpture of teleoconch whorls consisting of 
high, strong, narrow varices, each witli short, broad, 
blunt, open primary spines. First whorl with 8 varices, 
second to fourth with 8 or 9 varices, last whorl with 4 
varices. Varices of last whorl broader and more distant 
from each other than in other whorls, with a large gap 
between third and fourth (apertural) varices, almost 
twice the distance between second and third varices. 
Spiral cords from First to penultimate teleoconch 
whorl of high, narrow, smooth primary cords. First 
and second whorls with visible PI and P2, or P1-P3, 
P3 partially covered with next whorl, third and fourth 
whorl with visible P1-P3, P3 still partially covered by 
next whorl. Last whorl with IP, P1-P5, (s5), P6, (s6), 
ADP, MP. IP only weakly visible on axial varices, 
P1-P3 almost of same strength, P3 occasionally 
narrower, P4-P6 decreasing in strength abapically, P4 
and P5 high, broad, P6 very small, almost obsolète, 
occasionally preceded by almost obsolète s5. 
Aperture small, ovate, columellar lip narrow, smooth, 
lip partially erect, adhèrent on shell at 30-40% of 
adapical extremity. Anal notch moderately broad. 
Outer lip erect, with weak elongate, narrow denticles 
within: ID (split), DI split, D2 (split), D3, D4, D5. 
Siphonal canal short, narrow, strongly dorsal ly 
recurved at tip, narrowly open, with ADP and MP 
giving rise to short, open, blunt spines. 
Operculum and radula unknown. 
Remarks. A few species of Favartia hâve an elongate 
and narrow shell such as observed in F. roseotincta n. 
sp., namely F. flexirostris (Melvill, 1898), F. 
guamensis Emerson & D’Attilio, 1979, F. iredalei 
Ponder, 1972, F. jeanae Bertsch & D’Attilio, 1980 
and F. peregrina (Olivera, 1980). 
Favartia flexirostris (Figs 20, 31) which also 
occurs in Oman, differs from F. roseotincta n. sp. by 
many shell characters, namely in having a rounded, 
globose protoconch (Fig. 31), more rounded 
teleoconch whorls with a globose last whorl and a 
rounded aperture, numerous, broad, secondary spiral 
cords on the whole shell, and a longer, more strongly 
tapered siphonal canal. 
Favartia guamensis differs also in many ways, 
namely by having a very different, conical protoconch 
of sinusigeral type, consisting of 3-3.5 whorls, 
denoting planktotrophic larval development. Its 
geographical distribution is therefore also much more 
expanded, ranging from off Mozambique (East Africa) 
to the Tuamotus (Central Pacific). Other différences 
are numerous such as the lower and broader spire 
whorls, the narrower and straighter shoulder ramp, the 
broader and more squamous primary spiral cords, the 
small, rounded aperture with a characteristic narrow, 
deep anal notch and the single spine (ADP) on the 
narrower siphonal canal. 
Favartia iredalei (Fig. 21) from Lord Howe 
Island, NSW, Australia and West Sumatra also has a 
different protoconch of 1.5 rounded whorls. It differs 
also in having a less sloping and narrower shoulder 
ramp with IP, or adis and IP, and in having more 
squamous primary cords and obvious secondary cords 
on the convex part of the last teleoconch whorl. 
Both F. jeanae and F. peregrina from the 
Philippines also differ in having a different larval 
development, denoted by their conical, multispiral 
protoconch of 3-3.5 whorls and a terminal lip of 
sinusigeral type. The shell morphology of F. jeanae is 
close to F. roseotincta n.sp but besides the protoconch 
différences, the shell differs in having a comparatively 
higher spire, narrower primary spiral cords, obvious 
adis and IP on the shoulder ramp, and a narrower, 
tapered siphonal canal. 
Favartia peregrina differs in many ways and does 
not need to be compared further here. 
Another species from Elat (Red Sea), was named 
Favartia elatensis Emerson & D'Attilio, 1979 but it 
actually tumed out to be a Mitrexsid species (Houart, 
1994, Merle & Houart, 2003) and differs from F. 
roseotincta in many respects. 
Figures 2-22 
2-6. Favartia (Favartia) colombi n. sp. 
2-3. Oman, Masirah Island, Ras Al Ya, 20°29’42" N, 58°57'029" E, 21 m, holotype IRSNB IG 31676/MT 2316, 
15.6 mm; 4-5. Oman, Masirah Island, Ras Al Ya, 20°39’504" N, 58°52’138" E, 21 m, paratype RH 12 mm; 6. 
Oman, Masirah Island, Ras Al Ya, 20°29’42" N, 58°57'029" E, 21 m, paratype MNHN 23206 
7-12. Favartia (Favartia) roseotincta n. sp., Oman, Masirah, Ras Al Ya, 20°39’504" N, 58 0 52’138” E, 21 m. 
7-8. Holotype MNHN 23205, 8.3 mm; 9-10. Paratype SG, 8.2 mm; 11-12. Paratype RH, 8.1 mm. 
13. Favartia (F.) cecalupoi Bozzetti, 1993, Ras Hafun, Somalia, SG, 12.4 mm; 14. Favartia (F.) rosamiae 
D Attiho & Myers, 1985, Seychelles, RH, 15.6 mm; 15-16. Favartia (F.) paulboschi Smythe & Houart, 1984, 
iuw\\a Masirah, Oman, paiatype RH, 17 mm; 17-18. Favartia (Pygmaepterys) yemenensis (Houart & 
ïamk, 1989); 17. Gulf ot Aden, RH, 23 mm; 18. Oman, Masirah Island, Ras Al Ya SG 16 7 mm - 19 
Favartia (P.) adenensis (Houart & Wranik, 1989), Gulf Of. Aden, PDR Yemen, paratypeRH. 15.4 mm; 20. 
!" (F)flexirostris (Melvill, 1898), Oman, N Of. Muscat, RH, 11.3 mm; 21. Favartia (F.) iredalei Ponder, 
. f Australla - NSW, Lord Howe Island, RH, 6.1 mm; 22. Favartia (F.) jeanae Bertsch & D'Attilio. 1980, 
Philippines, Cebu, RH, 8.5mm. 
42 
