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Herpetologica, 61(3), 2005, 268–275 Ó 2005 by The Herpetologists’ League, Inc. A NEW SPECIES OF ISCHNOCNEMA (ANURA: LEPTODACTYLIDAE) FROM LA PAZ, BOLIVIA MICHAEL B. HARVEY1,4 1 AND COLEMAN M. SHEEHY, III 2,3 Natural Sciences Department, 3501 S.W. Davie Road, Broward Community College, Davie, FL 33314, USA 2 Department of Zoology, University of Florida, Gainesville, FL 32611, USA 3 Florida Museum of Natural History, Division of Herpetology, University of Florida, Gainesville, FL 32611, USA A
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  Herpetologica , 61(3), 2005, 268–275 Ó 2005 by The Herpetologists’ League, Inc. A NEW SPECIES OF ISCHNOCNEMA (ANURA: LEPTODACTYLIDAE)FROM LA PAZ, BOLIVIA M ICHAEL B. H ARVEY 1,4 AND C OLEMAN M. S HEEHY , III 2,3 1 Natural Sciences Department, 3501 S.W. Davie Road, Broward Community College, Davie, FL 33314, USA 2 Department of Zoology, University of Florida, Gainesville, FL 32611, USA 3 Florida Museum of Natural History, Division of Herpetology, University of Florida, Gainesville, FL 32611, USA A BSTRACT : We describe a new species of  Ischnocnema from upper montane rainforest in La Paz, Bolivia.Unlike its congeners, the new species possesses notched ungual flaps, a short dorsolateral fold, and a smallaxillary gland. The new species resembles I. sanctaecrucis and is the third species of  Ischnocnema knownfrom Bolivia. Key words: Anura; Bolivia; Ischnocnema choristolemma (new species); Ischnocnema sanctaecrucis ;Leptodactylidae U NTIL the 1970’s, the genus Ischnocnema  was represented by  I. quixensis from theUpper Amazon and I. verrucosa from theAtlantic rainforests of Brazil. Recently, addi-tional species of  Ischnocnema have been dis-covered in the Andean foothills. Lynch (1974)described I. simmonsi from the Cordillera delCondor, Ecuador, and Duellman (1990) dis-covered I. saxatilis in San Martı´ n, Peru.Harvey and Keck (1995) first reported thegenus from Bolivia when they described I. sanctaecrucis from cloud forests of ParqueNacional Amboro´ , Santa Cruz. Ischnocnema verrucosa has rarely beencollected (Lynch and Schwartz, 1971) and isknown only from the Atlantic rainforests of Brazil. Duellman (1978, 1990), Lynch (1972,1974),Lynch and Lescure(1980),andToftandDuellman (1976) published distributional datafor I. quixensis in upper Amazonia. Recently collected specimens extended the range of thisspecies to Cusco and Madre de Dios in south-ern Peru (Harvey and Keck, 1995; Morales,1997; Morales and McDiarmid, 1996; Rodrı´ -guez and Cadle, 1990; Rodrı´ guez et al., 1993).De la Riva et al. (2000) reported I. quixensis fromPandoinnorthernBolivia,butdidnotgivemore precise locality information (the speci-men camefromSanSebastian; Reserva Tahua-manu; 11.40722 8 S, 69.0175 8 W, S. Reichle,I. De la Riva, personal communication).Additional specimens of  I. sanctaecrucis werelater found in Cochabamba (Reichle, 1999),and Reichle (1999) described this species’ call.During the last ten years, M. B. Harvey andfield parties from the Coleccio´ n Boliviana deFauna made several expeditions to the Serra-nı´ a de Bella Vista, a humid ridge covered inupper montane rainforests in the foothills of La Paz, Bolivia. An earlier paper (Harvey andNoonan, 2005) reported centrolenids collectedat this locality. Among the rocky seeps inrainforests on the lower slopes of the serranı´ a,Harvey collected specimens of a distinctivenew  Ischnocnema , which we describe herein.M ATERIALS AND M ETHODS Specimens were fixed in 10% formalin andpreserved in 70% ethanol. Measurements were taken with a dial caliper under a dissect-ing scope to the nearest 0.01 mm. To avoidpseudoprecision, we follow the recommenda-tion of Hayek et al. (2001) and report values to0.1 mm. We measured snout–vent length(SVL), head length (length of a chord fromthe rictus to the tip of the snout), head width(at the rictus), eye–nostril distance (shortestdistance from the anterior border of the ocularaperture to the posterior border of the nostril),distance from the nostril to the tip of the snout,length and height of the tympanum includingits annulus, eyelid width (maximum distancefrom the orbital margin to the edge of theeyelid), interorbital distance (shortest distancebetween the orbits), internarial distance (dis-tance between the upper edges of the nostrils),hand length (from the proximal edge of thepalmar tubercle to the distal margin of thethird finger), foot length (from the proximalmargin of the inner metatarsal tubercle to the 4 C ORRESPONDENCE : e-mail, mharvey@broward.edu268  distal margin of the fourth toe), and length of the tibia. Eye diameter is reported, though wecaution readers that Hayek et al. (2001) show this character to be both highly variable andprone to preservation artifacts. Our numbereddiagnosis follows the standardized format usedby J. D. Lynch and W. E. Duellman (updatedand modified by them in 1997) for the closely related genus Eleutherodactylus . We deter-mined adulthood by opening the coelom andinspecting the reproductive organs. In thedescription, colors characterized usingSmithe’s (1975) color guide are capitalizedand followed by his numbering system.S PECIES A CCOUNT Ischnocnema choristolemma sp.nov. Holotype.— Coleccio´ n Boliviana de Fauna(CBF; collector’s tag M. B. Harvey 5753,Fig. 1) 5611, an adult female from the Serranı´ ade Bella Vista, Caranavi province, La Pazdepartment, Bolivia, ca. 1000 m, found inrocky leaf litter near a stream on 1 January 1999 by M. B. Harvey. Paratype.— A juvenile male topotype, Flor-ida Museum of Natural History, University of Florida (UF) 142703, collected by M. B.Harvey on 1 January 1999. Diagnosis.—Ischnocnema choristolemma may be distinguished from its congeners andall species of  Eleutherodactylus by the follow-ing combination of characters: (1) skin of dorsum tuberculate, that on venter smooth;discoidal fold weak and far anterior on belly;dorsolateral fold tuberculate, not extendingbeyond anterior edge of sacrum; (2) tympanicmembrane and its annulus prominent, theirlength about 2/3 of eye diameter; (3) snoutsubacuminate in dorsal view, rounded inprofile; (4) upper eyelid lacking enlargedeyelid tubercle, slightly wider than interorbitaldistance; cranial crests absent; (5) dentigerousprocesses of vomers large, triangular, and F IG . 1.—Adult female holotype (CBF 5611) of  Ischnocnema choristolemma . September 2005 ] HERPETOLOGICA 269  posterior to choanae; (6) condition of vocal slitsand nuptial excrescence in males unknown; (7)second finger longer than first; discs weakly developed on hands; digital pads absent;(8) fingers lacking lateral fringes; (9) ulnartubercles low and inconspicuous, not formingfold or row; (10) heel and tarsal tuberclesabsent; (11) inner metatarsal tubercle oval andflat, larger than subconical outer metatarsaltubercle; supernumerary tubercles at base of toes; (12) lateral fringes, webbing, and digitalpads absent from toes; fifth and third toes of equal length, their tips extending just beyondpenultimate subarticular tubercle of fourthtoe; ungual flaps indented or notched ( 5 emarginate) on pedal digits 2–5; (13) dorsumbrown with darker markings; lips and limbsbarred; W-shaped mark in suprascapular re-gion; venter drab brown with cream flecks;posterior thigh and groin unpatterned;(14) SVL in adult female 46.4 mm; adultmales unknown. Description of holotype.— Head wider thanlong (head width/head length 1.2; Fig. 2);snout subacuminate in dorsal view, bluntly rounded in profile; shallow notch present inupper lip (i.e., between premaxillae); canthusdistinct, rounded in transverse section, straightfrom nostril to orbit; loreal region weakly concave; lips slightly flared below eye; narialregion protuberant; nares directed laterally;internarial region not depressed; eye large, itslength greater than interorbital distance andapproximately equal to eye–nostril distance(interorbitaldistance/eye–length0.7,eye-nostrildistance/eye–length 1.1); tympanic membraneand annulus prominent; tympanic membranesmooth and translucent; tympanum vertically ovoid (tympanum length/height 0.8), sepa-rated from corner of orbit by distance equalto about one-half length of tympanum; tym-panum extending ventrally to overlap caudalportion of maxilla; dorsal edge of tympanicannulus partially overlapped by tuberculatesupratympanic fold extending from posteriormargin of orbit and angled posteriorly and ventrally toward insertion of arm.Forelimbs long and slender; antibrachium with few, low ulnar tubercles, howevertubercles not forming distinct rows or folds;fingers slender (Fig. 3); relative lengths of fingers when adpressed 3 . 1 5 4 . 2, digit 4approximately equal to digit 1, digit 1 muchlonger than digit 2; terminal discs weakly  F IG . 2.—Adult female holotype (CBF 5611, SVL 5 46.4 mm, left) and subadult male (UF 142703) Ischnocnemachoristolemma .270 HERPETOLOGICA [ Vol. 61, No. 3  developed; ungual flaps indented on digits 3and 4, ungual flaps even and rounded on digits1 and 2; digital pads absent, no trace of circumferential grooves; webbing and fleshy fringes absent; thenar tubercle ovoid and only slightly smaller than large divided palmartubercle; subarticular tubercles large andsubconical in profile, their bases oval; subcon-ical supernumerary tubercles present betweenpalmar tubercles and basal subarticulartubercles, two on each of digits 1 and 3, oneon each of digits 2 and 4.Hind limbs moderately robust; tibia rela-tively short (tibia length/SVL 5 0.55); few cream tubercles (like those on dorsum) on ventral tarsus; tarsal folds absent; outer meta-tarsal tubercle subconical, smaller than flatoval inner metatarsal tubercle; toes slender;digital pads, fleshy fringes, and webbingabsent; terminal discs moderately well de- veloped, half again as wide as toes; ungual flapsnotched on digits 3 and 4, indented on digits 2and 5, even and rounded on digit 1; whenadpressed relative lengths of toes 4 . 3 5 5 . 2 . 1; toes 3 and 5 equal, their tips extending just beyond the penultimate subarticulartubercle; plantar subarticular tubercles largeand subconical in profile, their bases oval;smaller supernumerary tubercles round, oneon digit 1, two each on digits 2 and 3, four ondigit 4, none on digit 5.Dorsum of head, body, and limbs covered insmall evenly spaced tubercles with few scat-tered, medium-sized tubercles restricted todorsal body surfaces; tubercles on dorsum of head, body, and limbs with small clear tips;texture of eyelids as for body; eyelid tubercle(sensu Lynch and Duellman, 1997) absent;postrictal tubercle large and conical; smallerelongate tubercle on skin covering mandibledirectly below tympanum, remaining skin of mandible smooth; several tubercles of skincovering scapula irregularly fused; tuberculatelateral fold extending from posterior edge of suprascapula to anterior border of sacrum;flanks and postaxial surface of thigh aereolate; venter and remaining sides of limbs smooth; weak discoidal fold ending well anterior togroin; flat oval gland about as large as digitaltip of fourth finger present in axillary ( 5 post-humeral) region.Dentigerous processes of vomers subtrian-gular, narrowly separated, positioned postero-medial to choanae, each with four or five teethin a transverse row; choanae round, widely spaced, just medial to lingual shelf of maxilla;tongue slightly longer than wide, rounded without posterior notch, free posteriorly; vocalslits absent.Color in preservative (terminology followsthat of Smithe, 1975): Dorsal surface of body irregularly mottled Dusky Brown (19) andRaw Umber (23); irregular Dusky Brown andRaw Umber bands covering lips, arms, legs,hands, and feet; indistinct W-shaped Dusky Brown mark in scapular region; lateral surfaceof body irregularly mottled Dusky Brown andPearl Gray (81); oval gland in axillary regioncream; tympanum Raw Umber with irregularDusky Brown blotch on dorsal half; venter of  F IG .3.—Plantarandpalmarmorphology of  Ischnocnemachoristolemma (CBF 5611). September 2005 ] HERPETOLOGICA 271
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