

Ss 
a 
SS 
——= 
= 
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S55 
‘A 
(it 
fae 
M.J. ORLOVA-BIENKOWSKAJA 


A 
2 CSSeZ 
} ~N INNSsss < 
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WS B 


Soy 
Sey 
<—<Soe 
SS 
zs 
es 
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za 
SS 
mas 
SSF 
CSS QS 
BREET 
ERR 
HES 
Lp 
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LES 
LESH 
Six 
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ss 
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SS 
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FE 
L 
a 
Fig. 11S. vetulus, female trunk limbs. A, 4th limb, B, endopod of 4th limb, C, 5th limb. 
Female. Dorso-posterior valve prominence of moderate length, with 
wide base and large diameter (Fig. 23). Its diameter (Fig. 2) exceeds 
its length. Dorsal valve margin high, protruding backward. Depres- 
sions above and below dorso-posterior prominence of moderate size 
(deeper than in S. vetulus, but more shallow than in S. vetuloides, S. 
gibbosus and S.elizabethae). Ventral head margin straight or slightly 
concave, sometimes with small prominence. Depression on ventral 
head margin near rostrum deep. Ocellus elongate. 
DISTRIBUTION. 
America. 
(Fig. 21) Asia, Eastern Europe, N. Africa, N. 
REMARKS. Behning (1941) supposes S. mixtus to be a separate 
species. Manujlova (1964) believes it to be a synonym of S. 
elizabethae. Negrea (1983) and Fléssner (1972) consider it to be a 
synonym of S. vetulus. Investigation of the type has shown that S. 
mixtus differs from both S. vetulus and S. elizabethae. 
S. corniger Methuen was described from South Africa. There is 
no information about the type material. The original description 
(Methuen, 1910) 1s very brief. Judging fromillustrations, S. corniger 
is a Junior synonym of S. mixtus. 
S. beianensis Shi, Shi, 1994 was described from China 
(Heilongjang Province, 48°16'N, 126°31'E)(Shi & Shi, 1994). The 
authors write that this species differs from S$. vetulus in details of 
ocellus and in number of the anal teeth. Both characters are variable. 
Referring to the illustration, the ocellus of S. beianensis does not 
sufficiently differ from the ocellus of S. vetulus and S. mixtus. The 
number of anal teeth does not also differentiate these species. 
S. mixtus hungaricus Ponyi, 1956 is not in fact S. mixtus. It is a 
synonym of S$. vetulus (see above). S. serrulatus var. mixta 
Grochmalicki (1915) belongs to another subgenus. It is a junior 
homonym of S. mixtus. 
S. vetuloides Sars, 1898 
Fig. 24 
Simocephalus vetuloides Sars, 1898: 328; S. elizabethae: Behning, 
1941: 182 partim; Manujlova, 1964: 148; S. vetulus: Fryer, 1957: 
225 partim; Negrea, 1983: 138 partim. 
TYPE MATERIAL. Lectotype (designated here): Russia, North Sibe- 
ria, Jana river, 30. 6. 1885, leg. Ignatov: MPA: @ ad. (ZICC, 4690). 
Paralectotypes collected with lectotype: 38 9 Q ad. (ZICC, 4690). 
The vicinity of Jana river: CBS: 9 ad. (ZICW). Dolgulach, 16-18. 6. 
1885: 32 Gad. (ZICW). 
MATERIALEXAMINED (Fig. 21). Lectotype, paralectotypes and other 
specimens from AC: Russia, vicinity of Yakutsk, 7. 1990, leg. 
Smirnov: 189 Qad., 99 Qjuv. Chita, sand-pit, 9. 9. 1991, leg. 
Smirnov: more than 709 Qad., 702 Qjuv., 1000h’'o’, 409 Qe. 
