http://www.jstor.org New Species and Records of Cave Shrimps from the Yucatan Peninsula (Decapoda: Agostocarididae and Hippolytidae) Author(s): Brian Kensley Source: Journal of Crustacean Biology, Vol. 8, No. 4, (Nov., 1988), pp. 688-699 Published by: The Crustacean Society Stable URL: http://www.jstor.org/stable/1548704 Accessed: 25/07/2008 14:22 Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/action/showPublisher?publisherCode=crustsoc. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit organization founded in 1995 to build trusted digital archives for scholarship. We work with the scholarly community to preserve their work and the materials they rely upon, and to build a common research platform that promotes the discovery and use of these resources. For more information about JSTOR, please contact support@jstor.org. JOURNAL OF CRUSTACEAN BIOLOGY, 8(4): 688-699, 1988 NEW SPECIES AND RECORDS OF CAVE SHRIMPS FROM THE YUCATAN PENINSULA (DECAPODA: AGOSTOCARIDIDAE AND HIPPOLYTIDAE) Brian Kensley ABSTRACT The second known agostocaridid shrimp, Agostocaris bozanici, is described from a cenote on Cozumel Island. The new species is characterized by having a dorsally unarmed rostrum, and 5 pairs of lateral, and 5 pairs of posterior spines on the telson. A new genus and species of hippolytid, Yagerocaris cozumel, is described from a different cenote and an anchialine cave on Cozumel. The genus is characterized primarily by the possession of a very strong pterygos- tomian spine on the carapace, subequal second pereiopods in which the carpi have 5 articles, a single arthrobranch of maxilliped 3, and a rectangular posterior lobe on the telson. Both shrimps are true anchialines, having been taken from marine-salinity water in cenotes well away from the coast, and both have reduced eyes. The hippolytid shrimps Somersiella sterreri Hart and Manning (previously known only from Bermuda) and Janicea antiguensis (Chace) (previously recorded from Antigua, Bermuda, and the Bahamas) are recorded from a cave on Cozumel Island. While these latter 2 species show some differences from the original descrip- tions, it is felt to be premature to place them in new taxa. Numerous species of caridean shrimps have been recorded from the fresh-water, anchialine, and marine caves on islands of the Caribbean and the Yucatan Peninsula of Mexico (Hobbs and Hobbs, 1976; Hobbs, et al., 1977; Holthuis, 1986). From the latter area alone, three species of Typhlatya are known (one undescribed), in addition to Creaseria morleyi (Creaser), while a species of Procaris awaits description. With many more caves and cenotes being explored, fur- ther shrimp records can be expected, as the present two records demonstrate. (Cenote is the Mayan word for a cave or naturally oc- curring well containing water.) With each such record, another piece falls into place in the jigsaw puzzle that is the biogeography of anchialine shrimps of the world. The present material was collected by a team of cave divers who visited some of the cenotes of the Yucatan Peninsula during 1987 and 1988, and was made available to the Smithsonian Institution by Ms. Jill Ya- ger. Family Agostocarididae Hart and Manning, 1986 Agostocaris bozanici, new species Figs. 1-3 Material.-Holotype USNM 211443, 9 CL 7.4 mm, paratypes USNM 211444, 1 2 CL 8.0 mm, 3 immature CL 5.9, 4.8, 4.3 mm; Xcan-ha Cenote (Cenote Roja), Cozumel Island, Quintana Roo, Mexico, 80-100 ft (24.4-30.4 m) below surface of water, salinity 34%o; collected by J. Bozanic 25, 29 September 1987.-Para- type USNM 211465, 9 CL 5.2 mm; Xcan-ha Cenote, Cozumel Island, Quintana Roo, Mexico; collected by H. Ayala, D. Drago, 18 March 1988.-Paratypes, USNM 211466, 2 CL 7.2 mm, 2 immature CL 4.0 mm, 4.1 mm; Xcan-ha Cenote, Cozumel Island, Quin- tana Roo, Mexico, 60-136 ft (18.3-41.5 m) below sur- face of water, salinity 34%0; collected by J. Bozanic, 6 April 1988. Description. -Integument firm, thin, with sparse scattering of tiny black chromato- phores. Rostrum triangular, apically acute, bilaterally compressed, dorsally unarmed, carinate, carina extending onto anterior car- apace for distance equal to rostral length, ventrally carinate. Dorsal profile of cara- pace evenly convex; infraorbital and bran- chiostegal angles rounded; very faint orbi- tobranchial sulcus present. Pleuron of abdominal somite 2 broadly ovate; pleura of somites 3-5 posteroventrally rounded; somite 6 dorsally twice length of somite 5, with small posteroventral tooth. Telson about 3 times longer than basal width, ta- pering slightly, bearing 5 pairs of mobile lateral spines; posterior margin slightly con- vex, armed with 5 pairs of spines, second pair from lateral margin longest. Eye not differentiated into cornea and stalk, lacking pigment, conical, directed an- terodorsally. Antennule with basal pedun- cular article subequal in length to articles 2 and 3 combined; stylocerite with proximal two-thirds parallel-sided, apically acute; su- 688 KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN 4~444 '~~~~~4 689 C) CO CO 0) 0 0) 0) CO3 0 0 0) 0 011 e t, ! l / It II II 41 r" u u u u u u p u u JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 8, NO. 4, 1988 G Fig. 2. Agostocaris bozanici, new species: A, mandible; B, mandible, further enlarged; C, maxilla 1; D, maxilla 2; E, maxilliped 1; F, maxilliped 2; G, maxilliped 3. perior flagellum subequal to carapace in length, inferior flagellum slightly longer. Antennal scaphocerite 1.7 times as long as greatest width, small distal tooth on lateral margin not reaching apex of blade; flagellum at least 3 times longer than carapace length. Mandible with palp of 2 broad articles, dis- tal article bearing marginal setae; incisor process having row of 11 small teeth; molar thin walled, distally blunt. Scaphognathite of maxilla 2 having elongate setae at pos- terior end reaching well into branchial chamber. Disposition of branchiae, epipods, and exopods:. maxilliped 1, exopod, bilobed epi- pod; maxilliped 2, exopod, unilobed epi- pod; maxilliped 3, exopod, straplike epipod, 1 bipartite arthrobranch, 1 pleurobranch; 690 KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN A Fig. 3. Agostocaris bozanici, new species: A, antennule; B, antenna; C, pereiopod 1; D, pereiopod 2; E, pereiopod 3; F, pereiopod 4; G, pereiopod 5; H, anterior carapace in dorsal view; I, telson and right uropod in dorsal view; J, pleopod 1 $; K, pleopod 2 Y. pereiopod 1, exopod, 1 arthrobranch, 1 pleurobranch; pereiopod 2, exopod, 1 ar- throbranch, 1 pleurobranch; pereiopod 3, 1 arthrobranch, 1 pleurobranch; pereiopod 4, 1 arthrobranch, 1 pleurobranch; pereiopod 5, 1 rudimentary arthrobranch, 1 pleuro- branch. Maxilliped 1 with distally triangular en- dite, digitiform endopod, exopod distally setose, with broad caridean lobe at base, epipod broadly bilobed. Maxilliped 2, en- dopod pediform, ischium and basis fused. Maxilliped 3 of 4 articles, article 2 having incomplete suture indicating fusion of ar- ticles. Pereiopod 1 shorter than maxilliped 3 and pereiopod 2, chelate, dactylus more slender than propodal finger, flattened-ovate in cross section, entire cutting edge bearing single row of minute, finely serrate, trian- gular spines; propodal fixed finger with broad 691 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 8, NO. 4, 1988 transparent flange along cutting margin, lat- ter having single row of minute, closely set blunt spines; propodal palm about half length of fingers; carpus distally widened, articulating on posterior surface of propo- dus. Pereiopod 2 more slender but longer than pereiopod 1, chelate, dactylus lamel- late, margins setose; propodal finger heavier than dactylus, faintly curved along outer margin, compressed, with numerous setae. Pereiopod 3, ischium bearing 2 spines on outer surface; dactylus having 3 spines on posterior surface. Pereiopod 4, ischium bearing 2 spines on outer surface; propodus with cluster of serrate grooming setae pos- terodistally; dactylus having 3 spines on posterior surface. Pereiopod 5, ischium with 2 spines on outer surface; propodus 1.8 times length of propodus of pereiopod 4, bearing dense serrate grooming setae along poster- odistal third; dactylus with row of about 8 small spines on posterior margin. Pleopod 1 biramous, exopod elongate, setose; en- dopod short, ovate, devoid of spines or se- tae. Pleopods 2-5 biramous, exopod and endopod elongate, setose; endopod bearing slender appendix intema. Outer uropodal ramus bearing 2 spines on outer distal mar- gin, diaeresis in distal third, distal margin broadly rounded; inner uropodal ramus narrower and distally more narrowly round- ed than outer ramus. Gut Contents. -The foregut of the dissected 8.0-mm CL female specimen was removed, and found to be packed with the fine fila- ments of Oscillatoria corallinae Gomont, a cyanobacterium thought to be a benthic form (J. Norris, personal communication). The gut contents of a second female (USNM 211465) was examined, in which the ante- rior foregut contained densely packed fila- ments of 0. corallinae, while the posterior part contained a brown mass of fine organic detrital material including what happened to be oval fecal pellets of about 0.06 mm longer diameter. Remarks. -The family Agostocarididae was established for Agostocaris williamsi from caves on Grand Bahama Island and the Turks and Caicos Islands by Hart and Man- ning (1986). Several features easily distin- guish A. williamsi from the present species. These include the five pairs of lateral tel- sonic spines (four pairs in A. williamsi), and five pairs of posterior telsonic spines (four pairs in A. williamsi), and the presence of a pleurobranch above maxilliped 3 and pe- reiopod 1 (absent in the earlier species). The rostrum of A. williamsi was originally de- scribed as dentate; in fact, this is a variable feature. Five paratypes in the Smithsonian Institution were examined, in which the dorsal rostral dentition was found to be 9, 5, 1, 1, and 0. In all five, the anterior ros- trum bears fine upright dorsal setae. In A. bozanici, both teeth and dorsal setae are ab- sent. With only two species known in the fam- ily, the affinities of the agostocaridids con- tinue to be unclear. A similarity not men- tioned by Hart and Manning (1986) in their original description of the family, lies in the form of the first two pairs of pereiopods of members of the Atyidae. In these, the car- pus, which is distally widened or even cup- shaped, articulates on the underside of the propodus, while the dactylus articulates proximally on the propodus to form the che- la. Given the many differences between these two families in branchial formulae and mouthpart structure, however, this pereio- podal similarity may well be a parallelism. Etymology. -This species is named for vet- eran cave diver Jeff Bozanic. Family Hippolytidae Dana, 1852 Yagerocaris, new genus Diagnosis. -Carapace with strong pterygos- tomian spine. Upper antennular flagellum biramous. Mandibular palp of 2 articles. Exopods on maxillipeds 1-3. Epipods pres- ent on maxillipeds 1-3, and pereiopods 1- 4. Single arthrobranch present on maxil- liped 3 only. Left and right pereiopods 2 subequal; carpus of 5 articles. Telson with posterior margin between inner pair of spines produced into rectangular lobe reaching more than halfway along elongate inner spines. Type species. - Yagerocaris cozumel, new species. Etymology. - Yagerocaris is a combination of"Yager," for Ms. Jill Yager, indefatigable cave diver and biologist, and the Greek kar- is, a shrimp. The gender is feminine. Remarks. -The above diagnostic charac- 692 KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN ters in combination separate the present ge- nus from any earlier-described hippolytid (see key in Holthuis, 1955: 95). Of the more recently described cave and anchialine hip- polytids, the present material bears a su- perficial resemblance to the genus Callias- mata Holthuis, 1973, especially in the finely setose carapace. Calliasmata, with one species in the Red Sea area and one from the Dominican Republic, possesses second pereiopods having multiarticulate carpi and meri, whereas Yagerocaris has only a 5-ar- ticulate carpus of pereiopod 2. Further, the form of the very strongly spiniform ptery- gostomian area of the carapace and the con- figuration of the posterior part of the telson find no equivalents among the hippolytid genera. Yagerocaris cozumel, new species Figs. 4-6 Material. -Holotype, USNM 211445, ovigerous spec- imen, CL 7.0 mm; paratypes, USNM 211446, oviger- ous specimen, CL 7.0 mm, postovigerous specimen, CL 7.2 mm, nonovigerous specimen, CL 5.5 mm (dis- sected); Areolito Cenote, Cozumel, Quintana Roo, Mexico, 40 ft (12.2 m) below surface of water, salinity marine; collected by J. Bozanic, 20 September 1987.- Paratype, USNM 211463, ovigerous specimen, CL 6.0 mm, Cueva de Quebrada, Parque de Chankanaab, Cozumel, Quintana Roo, Mexico, salinity 350o, col- lected by D. Williams, 18 September 1984.-Para- types, USNM 211467, 2 ovigerous specimens CL 6.0 mm, 6.2 mm, 2 nonovigerous specimens CL 5.5 mm, 5.9 mm; Areolita Cenote, Cozumel, Quintana Roo, Mexico, 30 ft (9 m) below surface of water, salinity marine; collected by J. Bozanic, 31 March 1988. Description. -Integument of carapace and terga and pleura of abdomen bearing fairly dense, very short setules. Rostrum broad- based, triangular in dorsal view, ventral margin faintly sinuous in lateral view, reaching to about second antennular pe- duncle article. Carapace margin slightly convex in antennal region; pterygostomian region produced into strong spine. Anterior margin ofpleuron 1 straight; pleuron 2 more broadly rounded posteroventrally than an- teroventrally; pleura 3-5 each with distinct posteroventral tooth. Abdominal somite 6 four-fifths middorsal length of somite 5, with acutely triangular posterolateral lobe. Tel- son with 2 pairs of articulated dorsal spines in posterior half; posterior margin bearing 2 pairs of spines, outer pair one-fourth length of inner pair; margin between inner pair of spines produced into rectangular lobe reaching more than halfway along elongate inner spines, with 18-20 plumose setae on truncate/rounded posterior margin. Eyestalks basally fused, anteriorly flat- tened, small weakly pigmented area flanked by pair of low subacute lobes. Antennule with distally acute stylocerite reaching be- yond distal margin of second peduncle ar- ticle; basal peduncle article subequal in length to 2 distal articles together; dorso- lateral flagellum slightly longer than cara- pace plus rostrum, fused basal portion of 5 articles, free part of shorter ramus single article bearing 3 clumps of aesthetascs; ven- tromesial flagellum subequal to dorsolateral flagellum in length. Antennal scaphocerite about two-thirds longer than greatest width; lateral margin nearly straight, ending in strong tooth reaching as far forward as an- terior margin of blade; flagellum almost 3 times carapace length. Mandibular palp of 2 articles, distal ar- ticle longer than proximal, bearing numer- ous setae; incisor process having 5 distal sclerotized cusps; molar stout, obliquely truncate. Palp of maxilla 1 faintly bilobed. Maxilla 2 with proximal endite somewhat reduced, bearing elongate setae, distal en- dite deeply divided, lobes subequal; setae of scaphognathite longest anteriorly. Disposition of epipods, exopods, and branchiae: maxilliped 1, exopod, obscure- ly bilobed epipod; maxilliped 2, exopod, unilobed epipod; maxilliped 3, exopod, epipod (mastigobranch), reduced arthro- branch; pereiopod 1, epipod (mastigo- branch), 1 setobranch, 1 pleurobranch; pe- reiopod 2, epipod (mastigobranch), 1 setobranch, 1 pleurobranch; pereiopod 3, epipod (mastigobranch), 1 setobranch, 1 pleurobranch; pereiopod 4, epipod (masti- gobranch), 1 setobranch, 1 pleurobranch; pereiopod 5, 1 setobranch, 1 pleurobranch. Maxilliped 1 with proximal endite round- ed, smaller than distal broad endite; endo- pod short, digitiform; exopod elongate, slender, with distinct setose caridean lobe at base; epipod obscurely bilobed. Maxil- liped 2 endopod pediform, with distal ar- ticle articulating lengthwise along penulti- mate article. Maxilliped 3 just overreaching antennal scaphocerite; distal article bearing several spines in distal one-third, several rows of setae in proximal two-thirds; is- chiomerus and basis distinct. 693 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 8, NO. 4, 1988 694 ": 11 v a, Cl u U) u~ .- d) C's 2: V, v (.13 co;, ,GC KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN H Fig. 5. Yagerocaris cozumel, new genus, new species: A, antennule; B, antenna; C, mandible; D, maxilla 1; E, maxilla 2; F, maxilliped 1; G, maxilliped 2; H, maxilliped 3, with distal article further enlarged. Pereiopod 1 more robust but shorter than following legs, chelate, barely reaching base of antennal scale; dactylus about two-thirds length of propodal palm; cutting edges of fingers entire, straight. Pereiopod 2, both members subequal, overreaching maxil- liped 3 by chela and at least distalmost car- pal article; carpus consisting of 4 distal sub- equal articles plus more elongate proximal article. Pereiopod 3, ischium bearing 2 ar- ticulating spines on posterior margin; merus with single articulating spine at about mid- length of posterior margin. Pereiopod 4 sub- equal to pereiopod 3, ischium with 2 spines on posterior margin, merus with 1 or 2 spines on posterior margin. Pereiopod 5 little long- er than pereiopod 4, ischium with 1 spine on posterior margin; merus with 1 spine on posterior margin; propodus with postero- distal series of overlapping transverse rows of elongate grooming setae. Pleopod 1, endopod about one-fourth length ofexopod, with well-spaced marginal setae. Pleopod 2, endopod with appendix 695 O P it J JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 8, NO. 4, 1988 A F I ,Nf .1 Fig. 6. Yagerocaris cozumel, new genus, new species: A, pereiopod 1, with chela in lateral view; B, pereiopod 2; C, pereiopod 3; D, pereiopod 4; E, pereiopod 5; F, anterior carapace in dorsal view; G, telson and right uropod in dorsal view; H, pleopod 1; I, pleopod 2, with appendix masculina and appendix intema further enlarged. masculina and appendix intema articulat- ing at about midlength of mesial margin; appendix intera one-third length of appen- dix masculina, latter reaching beyond apex of rami, rodlike, with few distal spines. Uropodal rami barely overreaching tel- sonic apex; lateral ramus with articulating spine mesial to tooth on outer margin just overreaching distal margin of blade; diaresis complete. 696 KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN Hermaphroditism. -All nine specimens in hand possess a strong appendix masculina on pleopod 2, and a genital aperture can be seen at the base of the coxa of pereiopods 5. The smallest specimen (CL 5.5 mm) had eggs in the ovaries, visible through the car- apace, but lacked the elongate setae on the pleopodal protopods, used for the attach- ment of the eggs. The five ovigerous spec- imens (CL 6.0, 6.0, 6.2, 7.0, 7.0 mm) had lost some of the eggs, but eight, eight, seven, two, and six eggs, respectively, remained attached to the pleopodal protopod setae. The largest specimen (CL 7.2 mm) lacked eggs on the pleopods, but possessed the pro- topod setae. Given this combination of male and female characters, I tentatively suggest that this species possibly displays protan- drous hermaphroditism, a phenomenon not unknown in the Hippolytidae. Lysmata se- ticaudata (Risso) has been shown to exhibit irreversible protandrous hermaphroditism (Dohr, 1950), as has Lysmata nilita Dohr and Holthuis, 1950. Other members of the family that exhibit protandry include Chor- ismus antarcticus (Pfeffer) (see Yaldwyn, 1966) and Hippolyte inermis Leach (see Veillet et al, 1963). Bauer (1986) has dem- onstrated a more complex reproductive re- gime in the hippolytid Thor manningi Chace, in which primary males, primary fe- males, and protandric hermaphroditic in- dividuals occur in a given population. Bauer (1986) hypothesized that a proportion of about 50% primary males persists in the population of T. manningi, since these in- dividuals are more efficient at fertilizing breeding females than are the protandric in- dividuals. With only eight specimens of Ya- gerocaris cozumel available, it is not pos- sible to establish the type of reproductive pattern followed in this species. The occurrence of protandrous hermaph- roditism in a cave species possibly has a secondary reproductive advantage in ad- dition to the primary advantage correlated with the larger size of breeding females (Policansky, 1982). Given the somewhat re- stricted gene pool within a cave, there would be a greater chance for gamete exchange if two shrimps that happen to meet are both hermaphroditic and in the appropriate re- productive phase, than if the species were gonochoristic. Gut Contents.-The foregut which was re- moved from the dissected specimen con- tained an unidentifiable brown finely mac- erated mush. Etymology. -The specific epithet is the name of the type locality, the island of Co- zumel, used as a noun in apposition. Somersiella sterreri Hart and Manning, 1981 Fig. 7 Somersiella sterreri Hart and Manning, 1981: 442, figs. 1-28.-Manning and Hart, 1984: 661, fig. 5. Material. -USNM 211468, 1 nonovigerous Q CL 16.1 mm, 1 ovigerous Q CL 15.3 mm; Cueva Quebrada, Chankanaab Park, Cozumel, Quintana Roo, Mexico, marine water; collected by J. Bozanic 1 April 1988. Previous Records. -Bermuda, anchialine caves. Remarks. -Somersiella sterreri was de- scribed from Tucker's Town Cave and Chalk Cave, Bermuda (d holotype, USNM 184016, CL 12.0 mm, nonovigerous Q paratype, USNM 184017, CL 25.1 mm, respectively). Comparison of the Yucatan material with the types reveals differences in the rostrums, antennal spines, and the spination of the posterior three pairs ofpereiopods. The ros- tral differences almost certainly represent individual variation. The antennal spines of the types reach beyond the carapace margin, whereas in the two specimens from Cozu- mel, the spines do not reach the carapace margin. In the two specimens from Cozu- mel, the ischial spine count of pereiopods 3, 4, and 5 is 11, 5, and 4; that of the Ber- mudan types of 13 and 14, 8 and 11, and 5 and 7. The configuration of the antennal spines and the lower pereiopodal spine counts of the Cozumel specimens may be a reflection of a genetically isolated popula- tion. Until more material from both local- ities is available, it would be incautious to designate the Cozumel material as a sepa- rate taxon. The range extension of more than 1,500 miles (2,414 km) represented by this record is considerable. The ovigerous female from Cozumel carries an estimated 2,000 tiny eggs attached to the pleopods. The small size of these eggs would suggest an extended plank- tonic larval stage, in which case it might be predicted that this species will be recovered from other anchialine habitats in the Carib- 697 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 8, NO. 4, 1988 B Fig. 7. Somersiella sterreri Hart and Manning, 1981: A, anterior carapace and rostrum of holotype; B, anterior carapace and rostrum of paratype; C, carapace of nonovigerous 9 from Cozumel; D, carapace of ovigerous Q from Cozumel; E, telson and right uropod; F, pereiopod 3; G, pereiopod 4; H, pereiopod 5. bean area, and might also explain the oc- currence at Bermuda. Janicea antiguensis (Chace, 1972) Barbouria antiguensis Chace, 1972: 107, figs. 40,41. Janicea antiguensis: Manning and Hart, 1984: 657, fig. 2. Material.-USNM 211469, 2 ovigerous 2e, CL 8.5 mm, 10.0 mm; Cueva Quebrada, Chankanaab Park, Cozu- mel Island, Quintana Roo, Mexico, marine water; col- lected by J. Bozanic, 1 April 1988. Previous Records. -Antigua, seawall in dockyard, En- glish Harbour; Bermuda, cave on Cooper's Island; Ba- hamas, Cemetery Cave, Grand Bahama. Remarks. -The occurrence of this species on the Yucatan Peninsula is not entirely sur- prising, given the previous widespread rec- ords, especially that of the type locality in a relatively open, nonanchialine marine habitat. The numerous, very small eggs would also indicate an extended planktonic larval life, which, as with the previous species, would help to explain this wide dis- tribution. ACKNOWLEDGEMENTS I am grateful to Mr. Jeff Bozanic, Island Caves Re- search Center, Key Biscayne, Florida, Mr. Dennis Wil- 698 A KENSLEY: NEW CAVE SHRIMPS FROM YUCATAN liams, and Ms. Jill Yager, Old Dominion University, Norfolk, Virginia, who collected the shrimps described here, and made them available for study. Dr. James N. Norris, Department of Botany, National Museum of Natural History, Smithsonian Institution, identified the cyanobacterium mentioned here. This paper was read in manuscript by C. W. Hart, Jr., Janice Clark, and Dr. F. A. Chace, Jr., all of the Department of Invertebrate Zoology, Smithsonian In- stitution; I am grateful for their valuable comments. I also thank Dr. L. B. Holthuis of the Rijksmuseum van Natuurlijke Historie, Leiden, for his helpful sugges- tions. This paper is contribution number 5 of the Island Caves Research Center, Key Biscayne, Florida. LITERATURE CITED Bauer, R. T. 1986. 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