84 



L. BOUCK, D. THISTLE AND R. HUYS 



DIAGNOSIS. Harpacticidae. Antennule 9 6- or 7-segmented, with- 

 out pinnate or plumose setae on segments 1-6; with strong, modified 

 spines on segments 3-5 and enlarged pectinate or pinnate spines on 

 segment 6. Antennule cf with modified spine on segment 3. Antennary 

 exopod 1 -segmented, with 2 apical setae. Maxilla with 3 spines/ 

 setae on praecoxal endite. P2 endopod 3-segmented (2- ind"of N. 

 areolatus), P3 endopod 2- or 3-segmented, P4 endopod 2-seg- 

 mented. P2 9enp-3 with 1-2 inner setae. P3 9enp-2 without inner 

 seta. P4 exp-3 with 3 outer spines in both sexes. P4 enp-2 with 1 

 inner seta in both sexes. P2d"enp-2 without apophysis, inner seta 

 (proximal one in 2-segmented endopod of N. areolatus) not modi- 

 fied; enp-3 (-2 in N. areolatus) with 1 apical seta (inner one lost), 

 outer spine not fused to segment. P3cfenp-2 outer distal corner not 

 attenuated. 



Swimming leg setal formula: 





exopod 



endopod 





P2 



0.1.223 



0.1.221 or 0.1.121 



[9] 







0.1.211 



[(fsextus] 







0.311 



[cf areolatus] 







0.1.111 



[cfcf other species] 



P3 



0.1.323 



1.0.221 or 1.221 





P4 



0.1.323 



1.121 





P5 exopod round in both sexes. P5 endopodal lobe 9 expressed; 

 all setae well developed. 



Sexual dimorphism in rostrum, antennule, P2 endopod, P5, P6, 

 genital segmentation and size. 



Type SPECIES. Zausodes areolatus Geddes, 1968a = Neozausodes 

 areolatus (Geddes, 1968a) comb. nov. 



Other SPECIES. Z. limigenus Jakobi, 1954 = N. limigenus (Jakobi, 

 1954) comb, nov.; Z. paranaguaensis Jakobi, 1954 = N. 

 paranaguaensis (Jakobi, 1954) comb, nov.; Z. stammeri Jakobi, 

 1954 = /V. lawmen' (Jakobi, 1954);Z sextusLzng, 1965 =N. sextus 

 (Lang, 1965) comb, nov.; N. shulenbergeri sp. nov. 



Etymology. The generic name is derived from the Greek prefix 

 neos, meaning new, and alludes to the advanced position of this 

 genus within the Zausodes-group. Gender: masculine. 



Neozausodes areolatus (Geddes, 1968a) comb. nov. 



Type LOCALITY. Bahamas, Eleuthera, SW of Glass Window; 

 25°26'03"N, 76°36'10"W; 5 m depth, sand bottom. 



Material examined. 



American Museum of Natural History: holotype 9 dissected and 

 mounted on 3 slides (AMNH 12944); paratypes are 19 and 

 1 cf dissected on 3 slides each, and 8 9 9 in alcohol, collected from 

 type locality (AMNH 12945). Note that the holotype registration 

 number was inadvertently misprinted in Geddes (1968a) as 12949. 

 Zoological Museum of the University of Bergen: paratypes (2d" cf, 

 3 9 9) from Exuma Cays, Great Guana Cay, between White Point 

 and Black Point, 24°04'25"N, 76°23'45"W; 3^ m depth, sand 

 bottom (ZMUB 49315). 



REDESCRIPTION. All female illustrations are from the holotype 

 except Figs 8B-C, which are from paratypes. Male habitus and P5 

 illustrations are from a Bergen Museum paratype; other male illus- 

 trations are from an AMNH paratype. 



FEMALE. Body length measurements from AMNH paratypes: 

 measured from anterior margin of rostrum to posterior margin of 

 caudal rami: x = 606 pm (n = 3); without rostrum and caudal rami: 



x = 561 um (n = 3). Body (Figs 8B-C, 9B-C) dorsoventrally 

 flattened. Body width: x = 3 14 um (n = 3). Integumental surface (e.g. 

 Al, rostrum, urosome) with areolated ornamentation/sculpturing 

 (not illustrated). Sensillae present dorsally and dorsolateral^ on 

 urosomites 2- 4 and anal somite. Urosomites 2-5 with fine denticle 

 rows dorsally and dorsolaterally; antepenultimate and penultimate 

 somites with ventral spinular rows; anal somite with spinular rows 

 dorsally, ventrally, and laterally on the posterior margin. Ventral 

 posterolateral corners of urosomites 4-5 and lateral margins of 

 urosomites 2-A with spinules. Anal somite cleft medially; anus 

 located terminally, triradiate, bordered by incised frill that is par- 

 tially exposed in dorsal and ventral aspects; with two ventral pores 

 near posterior margin; anal operculum and reduced pseudoperculum 

 present. Caudal rami (Figs 8B-C. 9B-C) wider than long, with 7 

 setae: setae I — III bare, setae IV-V bipinnate, seta VI bipinnate, 

 dorsal seta (VII) carried on a Particulate socle. No gelatinous string 

 was apparent. 



Rostrum (Fig. 9A) prominent, lateral margins roughly parallel, 

 defined at base; with two short sensillae anteriorly and two sensillae 

 subdistally; with middorsal pore. 



Antennule (Fig. 8A) 6-segmented; segments 1 and 2 longest; first 

 segment widest with spinules; fourth segment with an aesthetasc 

 (50 um long), a surface indentation running from the anterior mar- 

 gin towards, but not reaching, the posterior margin, and an 

 uninterrupted cuticle extending the length of the posterior margin; 

 with setal formula 1-[1], 2-[10], 3-[8 + 2 unipinnate], 4-[4 + 2 

 unipinnate + (1 + ae)], 5-[6 + 2 pinnate], 6-[5 + acrothek]. The setal 

 formula was based on the holotype, but setae missing in the holotype 

 specimen that were found in the paratypic slides were added to the 

 formula. Added setae include 1 seta from segment 2, 1 unipinnate 

 seta from segment 3, and 1 seta from segment 5. The setation in the 

 illustration is a composite, showing all setae. 



Antenna (Fig. 9D). Coxa short and unornamented; allobasis with 

 spinular row, abexopodal seta, and membranous insert marking 

 original segment boundary between basis and first endopod seg- 

 ment; free endopod 1 -segmented; lateral armature consisting of a 

 pinnate spine and 1 pinnate, 1 short bare, and 1 long bare seta; distal 

 armature comprising 1 seta, 1 unipinnate, curved spine, and 4 

 geniculate spines, longest one of which bearing spinules proximal to 

 geniculation and fused at base to a slender seta; with spinular rows 

 and hyaline surface frill as indicated in Fig. 9D; exopod 1 -seg- 

 mented with 2 distal, unequal setae and a spinular row. The short, 

 bare, lateral seta of the endopod was found on the paratype but could 

 not be discerned on the holotype. 



Mandible (Fig. 10A). Gnathobase with pinnate seta at dorsal 

 corner; coxa with proximal row of spinules; palp biramous, com- 

 prising basis and 1 -segmented exopod and endopod; basis produced 

 transversely, with proximal spinular row and 3 bipinnate setae (one 

 of which broken off in the holotype but observed in the paratype); 

 endopod longer than exopod, with 1 bare and 1 pinnate lateral seta 

 and 6 apical setae; exopod with 3 lateral and 4 distal setae and 

 subdistal spinules. 



Maxillule (Fig. 10C). Praecoxa with spinular row along outer 

 edge and with arthrite bearing 8 spines around distal margin, 2 

 anterior surface setae, and posterior spinular row; coxal endite with 

 5 setae; basal endite with 6 setae; endopod with 3 pinnate setae 

 distally and a lateral spinular row; exopod with 1 pinnate inner seta, 

 1 bare and 2 pinnate distal setae. 



Maxilla (Figs 10E-F). Syncoxa with 3 endites; praecoxal endite 

 with 3 bipinnate setae; coxal endites each with 1 bare seta and 2 

 pinnate setae; allobasis with claw and 3 bare setae; endopod 1- 

 segmented with 1 distally pinnate and 3 bare setae. 



Maxilliped (Fig. 1 0D). Syncoxa with a pinnate seta and numerous 



