22
finger bigeniculate, three teeth on proximal part, two
on the inner dorsal side and a third and smallest, on
the dorsal side; apex of finger inerm and acuminate;
frontal appendage simple, short, usually rounded at
tip; genitalia without linguiform outgrowths; scleroid
cercopods, fused with telson and spinose distally; anus
ventrally subterminal.
Female. Ovaries uniramous; cysts sphaerical, ornamented by ribs forming polygonal areas.
Differential diagnosis. S. similis is distinguished from
S. sealii and S. woottoni by the three teeth on the finger
and the absence of linguiform genital outgrowths (Fig.
3 C, D). S. similis like S. sealii has spinose cercopods
(Fig. 3 E), while S. woottoni has setose cercopods.
S. similis along with to the African S. bourquinii, S.
distinctus, and S. spinosus are the forms of the sealii
group without linguiform genital outgrowths. However, S. similis differs from them by the three teeth on
the finger, and from S. bourquinii, beside the former
characters, by spinose cercopods, which are setose in
the last species.
Distribution. S. similis has been recorded from Texas,
USA; from Mexico in the states of Nuevo Leon, San
Luis Potosi, and Tamaulipas, and from the Caribbean
islands of Jamaica, Puerto Rico, and Hispaniola
(Moore, 1958; Belk, 1975; Maeda-MartInez, 1991).
Streptocephalus woottoni Eng, Belk & Eriksen, 1990
(Fig. 4 A-F)
Streptocephalus woottoni Eng, Belk & Eriksen,
1990.
Type material. Holotype USNM 234417, paratypes
USNM 234418, and Department of Invertebrate Zoology, California Academy of Sciences, San Francisco
California, USA (CASIZ 064927).
Type locality. A pool situated between Murrietta Hot
Springs Golf Course and California Highway 79,
Riverside County, California, USA.
Material examined. DB 689 Riverside, Co., California,
USA 4 cf' cf'; DB 1071 San Diego County., California,
USA 2 cf'cf'17.7 mm used for SEM), 4 Q Q c. 15 mm.
Diagnosis. Male. Peduncle of distal outgrowth of
intermediate type; rotation of hand no more than
40°; inner side of proximal part of peduncle without
protuberances; peduncle with pulvinus; spur acuminate; lateral lamella with curved border between distal
part of thumb and spur; inner lamella mediolaterally produced, forming a cavity; distal part of thumb
inerm, geniculate, apex acuminate; finger bigeniculate,
two oblique teeth dorso-laterally directed on dorsalinner side of proximal part; proximal tooth spatulate
and shorter than distal tooth; distal tooth robust and
semirectangular; apex of finger inerm and acuminate;
frontal appendage simple, short, bilobed at tip; genitalia with a pair of lateral linguiform outgrowths; cercopods setose along inner and lateral borders; anus
terminal.
Female. Ovaries uniramous; cysts sphaerical ornamented by ribs forming reduced polygonal areas.
Differential diagnosis. See differential diagnosis of S.
sealii and S. similis. The main differences of S. woottoni as compared with the African species of the sealii
group are the robust and semi-rectangular distal tooth,
the linguiform genital outgrowths and the setose cercopods. S. bourquinii also has setose cercopods, but
its distal tooth, like in S. distinctus and S. spinosus, is
ridge-shaped (Hamer & Appleton, 1993).
Distribution. S. woottoni is endemic to California,
USA, and northern Baja California Norte, Mexico (Eng
et at., 1990; Brown et aI., 1993). It has been collected in the Riverside and San Diego Counties, and is
considered the most restricted Californian anostracan
(Eng et al., 1990).
torvicornis group, torvicornis subgroup
Streptocephalus guzmani n. sp.
(Fig. 5 A-F)
Streptocephalus sp. Maeda-Martinez, 1991. Streptocephalus sp. B. Maeda-MartInez et al. (1995; this volume).
Type material. Holotype cf' 14.4 mm, allotype Q 14.0
mm USNM 259672, 259673. Paratypes 30 cf' cf' 13.3
(12.1-15.l)mm,1O Q 13.1 (l1.3-14.8)mm USNM
259674-5, UJED 245, UG 234, collected 11 September
1985 by A. M. Maeda-Martinez. Additional specimens
from the type locality, 180 cf' cf' UJED 248 collected
21 October 1981,14 cf cf UJED 247 collected 15 July
1982, and from Saucillo, Viesca, c. 40 km E Torre6n,
Coahuila,4 cf' cf UJED 241 collected 15 May 1981
by A. M. Maeda-MartInez.
finger bigeniculate, three teeth on proximal part, two
on the inner dorsal side and a third and smallest, on
the dorsal side; apex of finger inerm and acuminate;
frontal appendage simple, short, usually rounded at
tip; genitalia without linguiform outgrowths; scleroid
cercopods, fused with telson and spinose distally; anus
ventrally subterminal.
Female. Ovaries uniramous; cysts sphaerical, ornamented by ribs forming polygonal areas.
Differential diagnosis. S. similis is distinguished from
S. sealii and S. woottoni by the three teeth on the finger
and the absence of linguiform genital outgrowths (Fig.
3 C, D). S. similis like S. sealii has spinose cercopods
(Fig. 3 E), while S. woottoni has setose cercopods.
S. similis along with to the African S. bourquinii, S.
distinctus, and S. spinosus are the forms of the sealii
group without linguiform genital outgrowths. However, S. similis differs from them by the three teeth on
the finger, and from S. bourquinii, beside the former
characters, by spinose cercopods, which are setose in
the last species.
Distribution. S. similis has been recorded from Texas,
USA; from Mexico in the states of Nuevo Leon, San
Luis Potosi, and Tamaulipas, and from the Caribbean
islands of Jamaica, Puerto Rico, and Hispaniola
(Moore, 1958; Belk, 1975; Maeda-MartInez, 1991).
Streptocephalus woottoni Eng, Belk & Eriksen, 1990
(Fig. 4 A-F)
Streptocephalus woottoni Eng, Belk & Eriksen,
1990.
Type material. Holotype USNM 234417, paratypes
USNM 234418, and Department of Invertebrate Zoology, California Academy of Sciences, San Francisco
California, USA (CASIZ 064927).
Type locality. A pool situated between Murrietta Hot
Springs Golf Course and California Highway 79,
Riverside County, California, USA.
Material examined. DB 689 Riverside, Co., California,
USA 4 cf' cf'; DB 1071 San Diego County., California,
USA 2 cf'cf'17.7 mm used for SEM), 4 Q Q c. 15 mm.
Diagnosis. Male. Peduncle of distal outgrowth of
intermediate type; rotation of hand no more than
40°; inner side of proximal part of peduncle without
protuberances; peduncle with pulvinus; spur acuminate; lateral lamella with curved border between distal
part of thumb and spur; inner lamella mediolaterally produced, forming a cavity; distal part of thumb
inerm, geniculate, apex acuminate; finger bigeniculate,
two oblique teeth dorso-laterally directed on dorsalinner side of proximal part; proximal tooth spatulate
and shorter than distal tooth; distal tooth robust and
semirectangular; apex of finger inerm and acuminate;
frontal appendage simple, short, bilobed at tip; genitalia with a pair of lateral linguiform outgrowths; cercopods setose along inner and lateral borders; anus
terminal.
Female. Ovaries uniramous; cysts sphaerical ornamented by ribs forming reduced polygonal areas.
Differential diagnosis. See differential diagnosis of S.
sealii and S. similis. The main differences of S. woottoni as compared with the African species of the sealii
group are the robust and semi-rectangular distal tooth,
the linguiform genital outgrowths and the setose cercopods. S. bourquinii also has setose cercopods, but
its distal tooth, like in S. distinctus and S. spinosus, is
ridge-shaped (Hamer & Appleton, 1993).
Distribution. S. woottoni is endemic to California,
USA, and northern Baja California Norte, Mexico (Eng
et at., 1990; Brown et aI., 1993). It has been collected in the Riverside and San Diego Counties, and is
considered the most restricted Californian anostracan
(Eng et al., 1990).
torvicornis group, torvicornis subgroup
Streptocephalus guzmani n. sp.
(Fig. 5 A-F)
Streptocephalus sp. Maeda-Martinez, 1991. Streptocephalus sp. B. Maeda-MartInez et al. (1995; this volume).
Type material. Holotype cf' 14.4 mm, allotype Q 14.0
mm USNM 259672, 259673. Paratypes 30 cf' cf' 13.3
(12.1-15.l)mm,1O Q 13.1 (l1.3-14.8)mm USNM
259674-5, UJED 245, UG 234, collected 11 September
1985 by A. M. Maeda-Martinez. Additional specimens
from the type locality, 180 cf' cf' UJED 248 collected
21 October 1981,14 cf cf UJED 247 collected 15 July
1982, and from Saucillo, Viesca, c. 40 km E Torre6n,
Coahuila,4 cf' cf UJED 241 collected 15 May 1981
by A. M. Maeda-MartInez.