PARACYCLOPS REVISION 



177 



(given by Reid (1987) as 540-640 urn, mean = 600). Genital, third, 

 fourth and fifth urosomal somites each ornamented with cuticular 

 pits on dorsal surface extending to ventral surface on third, fourth 

 and fifth somites (Figure 57A.B). First segment of antennule armed 

 with 8 setae plus an aesthetasc; one seta (A) large and modified by 

 ornamentation of strong spinules in proximal and mid sections, 

 tapering to fine point distally. 



All other appendages as in female except; one seta on terminal 

 endopodal segment of leg 1 spinulose (Figure 56J). Outer seta of 

 fifth leg plumose and less developed (Figure 57C). Sixth leg (Figure 

 57D) armed with 1 inner spine, shorter than second urosomal 

 somite, bearing spinules at base; middle seta spiniform, short and 

 stout; outer seta plumose. 



Differential diagnosis. P. novenarius can be differentiated 

 from other Paracyclops species by the combination of the following 

 characters: 



- the dorsal subdivision of second segment of female antennule, 

 observed in holotype and in one paratype (Figure 55C). Remain- 

 ing specimens with second segment divided into 2 segments as in 

 Figure 55E, F (partial suture line on second segment indicating 

 boundary between ancestral segments VI-X and XI). 



- the structure of the seminal receptacle (Figure 54B), the absence 

 of the mid-distal spinularrowon the posterior surface of the coxa 

 of leg 4 (arrowed in Figure 56C), the spinular pattern on the 

 caudal surface of the coxobasis of antenna (Figure 55D), and the 

 absence of spinular rows on the posterior surfaces of the first and 

 second endopodal segments of leg 2 (Figure 56B). 



Distribution: Brazil: Vereda Grande Pond, Aguas Emendadas Bio- 

 logical Reserve, Federal District, 15°32'30"S, 47°34'57"W; Wet 

 campo Marsh, Fazenda Agua Limpa, Distrito Federal; Goias, marsh 

 of Corrego Pocoes; Federal district, Brasilia, Lagoada peninsula 

 norte; Federal district, Brasilia, Lagoa Jaburu (Reid, 1987). 



Paracyclops smileyi Strayer, 1988 

 (Figures 58-60) 



Original description. 

 /ogifl 4 (3): 279-291. 



Paracyclops smileyi Strayer, 1 988: Stygo- 



TYPE LOCALITY. Type specimens were collected from the hyporheic 

 zone of Coxing Kill, Town of Gardiner, Ulster County, New York, 

 U.S.A, 17 December 1985 (Strayer, 1988). 



Material examined. Holotype (USNM Cat. No: 235368, one 

 slide) and Paratype (USNM Cat. No: 235369, one slide) females 

 were obtained on loan from United States National Museum of 

 Natural History. 



Redescription of adult female 



Due to the positioning of the dissected appendages on the slides and 

 to the poor condition of the slides it was not possible for this species 

 to be redescribed in detail. 



Genital double-somite, second and third abdominal somites (Fig- 

 ure 58C) without ornamentation of surface pits dorsally; posterior 

 margins of abdominal somites inconspicuously serrated dorsally. 

 Caudal rami short (Figure 58C.E), length given as 2.5 times longer 

 than broad by Strayer (1988). 



Antennule 12-segmented (Figure 59A); segment 6 with spiniform 

 seta (arrowed in Figure 59A); segment 9 with short aesthetasc 

 (arrowed in Figure 59A); apical segment with aesthetasc fused to 

 adjacent seta at base, and another aesthetasc located distally on 

 anteroventral margin of segment 1 1 . Setal formula 8, 4, 2, 6, 4, 2, 2, 

 3, 2 + aesthetasc, 2, 2 + aesthetasc. 7 + aesthetasc. Coxobasis of 



antenna (Figure 59D) with complex ornamentation on caudal and 

 frontal surfaces as figured and without spinular row near base of 2 

 inner setae on caudal surface. 



Spine and seta formula of swimming legs (Figures 60A-E) as 

 follows: 



Coxa 



Basis 



Exopod 



Endopod 



Legl 



0-1 



?-I 



I-1;1-1;III,5 



0-1:0-2:1,1,4 



Leg 2 



0-1 



1-0 



1-1:1-1 ;1II.I,5 



0-1:0-1(7); 1,1,4 



Leg 3 



0-1 



1-0 



1-1:1-1 ;IIU.5 



0-1:0-2:1.1,4 



Leg 4 



0-1 



1-0 



1-1:1-1:11,1,5 



0-1:0-2:1.11.2 



Leg 5 (Figure 58B) comprising single free segment, armed with 2 

 outer setae about 3-4 times longer than inner spine. 1 strong inner 

 spine. 



ADULT MALE. Unknown 



DIFFERENTIAL DIAGNOSIS. P. smileyi differs from otherParacyclops 

 species except P. waiariki Lewis. 1 974 and P. evtcyclopoid.es Kiefer, 

 1929 in having a 12-segmented antennule in the female. P. smileyi 

 differs from P. waiariki and P. eucyclopoides in the structure of leg 

 5 and in having shorter caudal rami (2.5 times longer than broad). P. 

 smileyi can also be differentiated from P. waiariki by the presence of 

 4 spines on the terminal exopodal segment of leg 3. 



Remarks 



There appears to be only a single inner seta on the second endopodal 

 segment of leg 2 in the available type material. It is probable that the 

 proximal seta (Figure 60C) is broken off in the types but it was 

 difficult to observe any scar indicating the position of such a missing 

 seta because of the poor condition of the slide. The presence or 

 absence of this seta should be confirmed by examination of new 

 material in the future. Similarly setal elements are missing from 

 mouthparts such as the maxillule and maxilla. 



Distribution. Known only from its type locality. 



Paracyclops reidae sp. nov. 



(Figures 61-64) 



Type locality. Pools in the leaf axils of a terrestrial bromeliad. 

 El Tucuche, Trinidad, W.I.; 24 July 1994. coll. R. Martinez and M. 

 Morton. 



Type material. The type material ( 1 1 specimens) is stored in the 

 collection of Smithsonian Institution, Washington D.C.. USA, Reg. 

 No: USNM 264163. 1 female and 1 male paratypes are stored in the 

 collection of The Natural History Museum, London, Paratype fe- 

 male, BMNH 1995.1668; paratype male, BMNH 1995.1669. 



Description of adult female 



Body length not including caudal setae 778 um. body width 341 urn. 

 Urosomal somites (Figure 6 1 A,B ) without ornamentation on ventral 

 and dorsal surfaces. Seminal receptacle divided into broad anterior 

 and posterior lobes (Figure 61 A). Fifth pedigerous somite with 

 fringe of 3-4 elongate setules at posterior margin. Anal somite with 

 spinular row on ventral surface (Figure 61 A). Caudal rami (Figure 

 61A.B) with convex inner margin; about 2.5 times longer than 

 broad. Anterolateral seta (II) longer than rami with 2 spinules near 

 base (Figure 61B); posterolateral seta (III) with spinular row at base 

 on ventral surface; terminal accessory seta (VI) plumose and about 

 2 times longer than caudal rami; outer terminal seta (IV) and inner 

 terminal seta (V) well developed and plumose; dorsal seta (VII) 

 about 1.5 times longer than ramus (Figure 61 B). 



