Baqri 1985 - Revision de Dorylaimida de Khera de India

7/26/2019 Baqri 1985 - Revision de Dorylaimida de Khera de India

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Bull. zoo! urv da 7 23): 27124, 1985

A TAXONOIC REVISION OF THE NEMATOE SPECIES (ORYLAIMIA

REPORTED BY KHERA (1970) FROM INDIA

ASER H. BAQRI

Zolgical Survey f Inda, Calcuta

ABSTRACT

Out of nematode species reported by Khera (9) from te bank of still and running

water om India, te specimens o 5 species are avaiable in he National Zoologcal Collectons of the Zoologcal Suvey of Inda Calcutta. These speimens were re-examned and it

was noted that the taxonomical status of some needed revson Moreover the descriptions

and ilustrations as provded by Khera were also inadequate The presnt paper reports the

canes in the taxonomical status of the following species : Dorylaimus stagnalis Djardin 1845om Jodhpur as Laimydorus fnalis Thorne 95 Dory!aimus ruwenzorii apud Khera 90 asMesodorylimus sp ; Dorylaimus multialaeus Kera 9 transerred to aimydorus. The maeo Eudorylaimus odher apud Khera 9 along wit an unidentied mae on the same sliderepresents a new species Laimydos khera.

The status of Dorylaimus stagnalis apud Khera 9 partim om Lucknow a snge femaleof Eudry!aimus odhneri and Actinoaimus omrooperi remains unchanged

NRODUCTIO

Khera (970) reported 11 nematode specesincluding two new of the Order Dorlaimdafom t banks of still and running waters

in Uttar Pradesh, Rajastan and Kerala.These secies were inadequately descriedand ilustrated and f soe only te odydimensions were provided The specimenswere deposited in the Nematode Collectionf the Zoology useum of JodhurUnversity Rajasthan where Dr. Kera was aReader in te Zoology Department till 1969However, in te same year e joined te

Zoological Survey of India, Calctta. Su-sequently he shifted most of his etode

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slides rom Jodhur and registered the samein te National Zooloical Survey of IndiaCalcutta /

The present author was ale to trace some

of the reistered specimens of ve speciesreorted y Khera (1970) A study of theserevealed that the identication of omespecies was not correct. Unfrunately themajority of the specimens were not properlypreserved.

The present paper reors the revisedidentication of the specimens of ve species,

out of 11 reported y Khera (1970) Theollowin tale rovies the reset stats o


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all the speies Te asterisk indicates tatte secimens of te seies are not traceableTe status of te nontraeable species as

ot ee anged xept Labrnema sPast

1. Dorylaimusstagnalis Dujardin, 1845 from

Luckow and Johpur

2. Dorylaimus ruwnzrii e Coninck, 1935(=Mesorylaimus ruwenorii) om

Pacapadra (Rajastan)3 Dorylaimus multialaeus era, 1970 fom

Lknow4. esrylaimus biroi* Dday, 1899)

Anrssy, 19595 Mesorylaimus cntrcercus* de Ma,

180) Geraert, 19666 Eulaimus odhneri (Allen, 1950)

Andra'ssy, 19597. Eurylaimus udaipurinsis* era, 1970 Labrnma sp (juveile)9. Actinlaimu omercoperi Filijev, 1931

10 Actinlaimus cstatus* Seider, 193511 Nygolaimu intermedius* (e Man, 180)

Dorylaimus stagnalis Dujardi, 1845i 1, E-H)

Measurements :

Females (4): L=379-435 mm; a=38-46

b=4.55.6;c=1720;V=141540-441

2-1'

Males (3) L=3.04-330 mm; a=3033=448; =787; T=5965

DESCRIPTION

Female : Body straigt or slitlyentrally urved posterior to vulva, taering

Buetin f the Zolgical Survey f India

wi was identied only on a sinle juvenilespecimen.

Status o te species reported by Kera

(1970)Present

(i) Lucknow poulation=D. stagnalis

(ii) Jodur poplation=Laimydorus nalisTorne, 1975

M esdorylaimus sp

Laimyorus multialaeus (era, 1970)N. CombM biroi

M. centrcercus

(i) Eudlaimus odhneri(ii) Laiydorus kherai n sp

Eudorylaimus udaipuriensis?

Actinolaimus mercoperi

Actinolaimu cstatusNygolaimus intermedius

gradually towards bot extreities Cutilenely striated, 5-9 m tik (tikest on

tail), marked wit 34 lonitudial liesi te middle and at base of oesoausLateral ords t!rd of te rrespondig bodywidt ear middle. Dorsal andventral body pores 6-8 and 57 respetivelyateral body ores 999 males), ofwic 18-1 i oesopageal regio, 68-76 iintestie ad prerectum region and 3 inaudal reion

Lip reion rouded, sligtly marked by aderesin 1/1451/55 odywidt at base


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'AQRI A axonomc revson of the Dorylamida

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BAQRI : A taxonomic reviin f the oryaimia 275

DESCIION

Female : Body irregularly curved uponxation taperin gradually towards both

ends. Cuticle about 2 m thick nely striated transversely. Lateral chords 1/3.5 ofbodywidth near middle. Ventral dorsal andlateral body pores not seen.

Lip region oset from body by a constriction about !th of bodywidt at base ofoesophagus. Amphidial pouches not seen.Odontostyle 13 m or 1.8 lip region-widthslon aperture 4.5 m or about 35% of theodontostyle length. Guidin ring 7.2 m or0.9 lip regon-width om anterior end.Odontophore 15.5 m or about 1.2 times theodontostyle length.

Basal expanded part of oesophagus occupying about 40% of the neck reion.Oesophageal gland neclei and their oricesnot visible Cardia short rounded Nerve

ring 85 m or about 33% of the neck regionrom anterior end. Prerectum 66 m orabout 4.5 anal bodywidths long. Rectum21 m or 1.5 anal bodywiths lon.

Vulva transverse ushed with body.Vagina 15 m or slightly less han i of thecorresponding body-width Reproductivesystem amphidelphic Uterus and oviductseparated by a sphincter. Oocytes arranged

in a single row except in the growth region.

Tail elonate-conoid 67 m or about 4.7anal bodywidths lon. Caudal pores notseen.

Habitat and lality: From the banks ofsline ditch at Pachhapadra Raasthan.

Remark Since D ruwenzrii de Coninck1935 had already been transferred by An

drssy (959) to his newly proposed genuMesdylaimu, Khera (970) must have

reported Pachhapadra population (3 ) as. ruwenzorii. Out of 3 females only oneale mounted on slid W 7192/1 alongwith juvenile of some unidentied doylaim

species was aailable which conrms that thelongitudinl ridges (32) reported by Khera(l.c.) are not present. The present study alsoreveals that the single available malebelongs to the genus M esodorylaimus but itdiers from M. ruwenzrii in having shorterodontostyle odontophore and tail (odontostyle 16 m odontophore about 15 times

the odontostyle length and c= 10 in M.ruwenzorii). However Khera had measuredthe odontostyle 10-1 m and calculated thevalue of c =9 13.5.

Unrnately it was not possible toidentify this specimen to speies levelbecaue of bad preservation. Hence it hasbee reported as esdrylaimu sp.

Laimydorus multialaeus (Khera 1970) N.Comb.

Syn. Dorylaimus multialaeus Khera 1970

(ig. 2)

Meaurements :

Female (3) L= 2.422.8 mm; a= 35-3;b = 5.3-5.9 ; c =10.012.4 ;

v=15-143472123.ale (2) L=2.02.17 mm; a=339;

b=4.4-4.; c=9609; T6466.

DESCRIPTION

Female : Body slightly ventrally curvedin the posterior half, tapering radually towards both extremities. Cuticle nely striated

transversely 36 m thick (thickest on tail).Lateral chords slightly less than /3rd of


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276

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Fig 2. AH : Laimydorus ultalaeus (Kera 1970) n comb AEnire ae B-Anrior e,C-Aphid D-Anterior region EAnerior ae reproucive syse ea ai,

GPoterior reion of ale Spice and aeral guiding piece.


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B : A taxonomic revision f the Dorylaimida 27

body-width near middle. Li region markedby a slight deression, bearing the usalnumber of ailae Amhids stir-shaed,slits occuying 8-9 m or 60% of the corresondng bodywidth, 67 m om anteriorextremity Sensillar ouches 171 m omamhidial slits Odontostyle 252 m or16-19 li reionwidth long ; aertur 1012m r 3642% of the odontostyle lengthOdontohore 283 m r about 11 odontostyle length Guidin ring 4-5 m or about

one li regionwidth om anterior extremity

Basal exanded art of oesohagus ccuyng 451% of the neck reion Postionf the oesohageal gland neclei and theirorices as follows :

D526539 SN7073 SN5-88DN546-563 SN75-77 S=8790DO-DN20-24

Nerve ring 12538 m or 2730% foesohageal length from anterior end Cardiaelongate conoid, about !thrd of thecorresonding bodywidth long, enveledby intestinal tissue Oesohagointestinaldisc resent Prerectum 12310 m or 46anal bodywidths long Rectum 373 mor 215 anal bodywidh long.

Vulva transverse Vana 2325 orabout rd of corresonding body-width

ong, sclerotized ieces resent at vulvaagina junction Gonads amhidelhicUterus much longer than oviduct, sermathecalike structure resent lled withserms Serm 94 m long Egg 7090X40-4 3 m Oocytes arranged in a single rowexcet in the growth region

Tail elonateconoid, 200-256 m or 710

anal bodywidths long, with 3 caudal oreso eac side

Male Similar to fmale in general shaeand morhology excet fr the more curvedosterior art of the body and dierentlyshaped tail Male reroductive system tyicalThree airs f eaculatory glands in the rerectum region Sicules 5053 m r 18-19anal bdywidths lon medially Lateralguidin ieces more r less rodshaed, 91 m lon In addition to one adanal, 2324 contiguous ventromedian sulementsresent Subventral aillae not visible excet two beteen adanal and ventromedian

sulement reion Prerectum starting anterior to the couatory muscles, 232320 mor 83 anal bodywidths long Tail convexconoid with rounded terminus, 202 m or0 7-0 anal bodywidth long, with 6-7 caudalores on each side

Habitat and lcality : From the banks of aeshwater rain connected to a river nearoce of the Registrar, Lucknow Universit,

Lucknw (U P)

Remarks : Khera (1970) escribed a newsecies, D. multalaeus, fro ucknow Threeemale and 2 ale aratyes are available inthe National Collection of Zoological Surveyof ndia on side W. 73 and W. 74The study of these aratys conrms thatthey do not belong to the genus Dorylaimus

Duardin, 1845 because of the absence of thecuticular longitudinal lines and should beaccmmdated under the genus LaimydrusSiddiqi, 1969 Since these secimens do nott with the escritions of known secies ofthe genus Lamydorus a new combination isbein roposed Laimydrus multalaeus(Khera, 1970) n comb comes very close toL. baldus Baqri & Jana, 192 but diers in

the absence of seudo 'Z organs and resenceof sermathecalike structure in the uter,

,


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and lhtly wider and dierenly shpedamphids

Khera (1970) hs reported the length of

odontophore 38-42 m and prerectum infemale 10010 m whch has been conrmedhere a 283 m and 23-8 m respectivey

Laimydorus fnais Thorne 1975

Syn Doryaimus stagnalis apud Khera

1970 parti (Jodhpur populaton)

Ne Doryaimus stagnais Dujardin, 845

( Fig , A-D)

Measrements :

Female ( L=4 mm; a=33; b=4 19

54; c=5 ; V= 0 .

Male (1): L=34 mm; a=35; b=44;

c=9; T=?

DEI

Female Body lightly ventrally curvdupon xation and taperin toward both ends

Cuticle 58 m thick (thicket at tail) Lateralhypodermal chords about rd of body-widthnear middle Doral ventral and lateral body

pores numerou but dicult to count precisely Lateral body pores 36 or more, 35in the oeophageal and 4 in the caudalreion

Lip reion marked by a liht depresion,

about ! th of bodywidt at base of oeophagu Amphids

tirrup-haped aerture

occupyin 8-9 m or slihtly less than half ofthe correponding bodywidth and 910 m

from anterior end Senillar pouches 17 mfrom amphidial lit

Bulletin of the Zoological Srvey of India

Odontostyle 45 m or 2 lip reionwidth lon; aperture 2 m or 4% of theodontostyle length Guidin ing 28 m or

3 ip reion-width frm anterior endOdontophore 44 or about equal to odontotyle lenth Basal expanded part of oeophagus occupie 53% of the oesophageal lengthLocations of the oeophaeal gland nuclei andther orce could not be oberved Nervering 1 72 m or 22 % of the neck region rom

anteior end Cardia with rounded tipenveloped by intestinal tissue Oesophao

intestnal disc preent Prerectum 25 mor 48 anal body-idths long Rectum 64 mor slightly more than anal bodywidth long

Vulva a lonitudinal lit Vagina 58 mlon or 45% of the correspnding body

wth, urrounded by phincter with moderately celrotized dital region Reproductiveytem amphidelphic Uteru lled with ovalsperm, 46 m lon Ueru and oviduct

eparated by phincter Ovaries reexedocyte arraned in a ingle row double row

and then in multiple row at the reion ofrowth

Tail elonate conoid 26 m or 5 analbody-wdth long wth 4 caudal pore oneach ide

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Mle ; Similar to male in geneal mor

pholoy except the tail hape and male reproductive ystem Odontostyle 46 m or 22lip region-width long aperture 22 m or4% of the odontotyle lenth Odontophore 4 m or 0.9 of the odntotyle length

Reproductive ystem typical Supplementconit of an adanal pair and a erie of 47contiguou ventromedian The rst ventromedian upplement ituated at about 25 anal

body-width from the cloacal openin Subventral papillae 24 irregularly paced


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280 Buetin o the Zoogical Survey f India

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Antero ed B-Femae ai CH : Laydous kherai n sp. CAnterio end DVuvaand Vaa, EFemae:ta FMae tai Gntire male


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BAQRI : A taxonomic revisin f the Drylaimida 1

appears to be tongueshape, but has becomedistorted due to attenig of the specimen.Oesophagointestinal disc present. Prerectum150 m or about 3 anal body-widths long

Rectum legth could not be measured becauseof the dorsovetral positio of the ematode.

Vulva a trasverse slit. Vagia 30 m or45% of the correspoding body-width witha moderately scleroized distal region. Uterusand oviduct separated by sphincter, uterilled with sperms. Ovaries reexed oocytesarraged in a sigle row, double row and the

in multiple rows at the region of growth.Tail 245 m log eate liorm tip

broken. Caudal pores ot see.

Male: Similar to male i generalmorphology except r tail shape ad malereproductive system. Odontostyle 31 mor about 2 lip regionwidths log Odotophore 36 m or about 1.2 times the odonto

style legth. Guiding rig 17 .5 m or 1.2lip regiowidths om aterior extremity.Gonads typical. Supplemets consist of aadaal pair ad a series of 26 contiguousventromedians. The rst ventromediasupplemet situated 2.3 aal bodywidthsfom cloacal opei. Subvetral papillaeot see. Spicules 65 m or 2.1 aal bodywidths log alog curved median lne. aterlguiding pieces present. Tail blutly rounded20 m or 0.65 anal bodywidth long. Caudalpores preset.

Diferential diagnosis Laimydorus kherai

n. sp is close to L. conurus (Thorne, 1939)Siddiqi 1969 ad L baldus Baqri & Jaa192. From the rmer it diers i havinghorter body and odontostyle, more posteriorly situaed guidig ring (L= 1.6 mm ;

odontostyle ad guidig rig 19 m ad

13 m respectively as calculated om Thoe,1939) The male further diers om Lconurus in having more ventromedian supplements and longer spicules (ventromedia

supplements 21 and spicules 50 m lo).L kerai has longer odontostyle and odontophore more posteriorly situated guiding ringand loger spicules than L aldus ( odontostyle 2425 m odontophore 930 m,guidin ring 14-15 m and spicules 53 mi aldus)

Type aitat and lcality : From the banksof stagat eshwater tank Surajkund,ucknow U. P.

Type specimens : Collected by Dr. S.Khera in April 1967 Holotype alon withmale paratype mounted on slide W 7193/1.

Eudorylaimus odhner (Allgen 1950)Adrssy, 1959

( Fig. 3 A A-B)

Measurements

Female (1): =2.11 mm a=47 b=18 23.55.0; c=15; V= 495 .

DESCRIPTION /

Body irregularly curved upon xationtapering gradually towards both ends.Cuticle 2.5-5 m thick (thickest on tail)nely trasversely striated. ateral chordsabout rd of body-width ear middle. Vetrl dorsal and lateral body pores ot seen

Lip region marked by a slight depressionOdontostyle 23 m or about 1.5 lip regiowidths log, aperture about 8 m or about35% o odontostyle leth. Guiding ring

2 m or 0 lip reiowidth rom aterior


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end. Oontophore 0 m or about 1 timesthe odontostyle length.

Basal expanded part of oesophagus about55% of oesophageal length Oesophageal

gland nuclei and their orices not seen.Cardia short, rounded Nerve ring 112 mor about 25% o oesophageal length omanterior end. Prerectum about two analbody-widths long Rectu 25 m or 1.4anal body-widths long

Vulva a transverse slit Vagina 22 m orabout hal of corresponding body-with.Reproductive system amphidelphic. Uterus

and oviduct separated by sphincterTail bluntlyrounded, 165 mor 0.9 anal

body-width long. Caudal pores not observed.

Habitat and ocality : From the banks

of stagnant reshwater tank, Surajkund

Lucknow, U P.

ActinolaimusomercooperiFilipjev, 1931

(Fig.4, C-E)

Measurements :

Female (1) L=280 mm; a3 b=5.0 c=12; V=5

DESCRIPTION

Body irregularly curved and taperinggradually towards both extremities. Cuticle4 m thick (thickst at tail), markedwith longitudinal striae Lateral chords thof bodywidth near middle. Dorsal, ventraland latera body pores not seen

Lip region with amalgamated ips, almostcontinuus with bdy. Vestibue a sclerotizedstructure, armed it 4 onchia, denticle

uein of the Zoogica SuY India

absent Amphids stirrupshaped, slits 8 mwide and 12 m from anterior end Sensillarpouches 19 m from amphidial slit. Odontostye27 m or 1.2 lip region-widths long,

aperture 11.5 m or about 43% of the odontostyle length. Guiding ring 18 m or 08 lipregionwidth fom anterior end. Odontophore 3 or 12 times the odontostylelength. Anterior slender part of oesophagusand ellipsoidal swellin of odontophoreregion oset by a contriction at theijunction. Basal expanded part of oesohagusoccupying about 48 % of the neck region.Position of the orices of oesophageal glands

as llows: =517; S6; S=2.5 S = 6. Oesophageal gland nucleinot observed Cardia bulntly rounded,enveloped by intestinal tissue. Prerectum220 m or about 6 anal body-widths long.Rectum could not be measured.

Vulva pore like. Length and shape ovagina not observed because of dorsoventralposition of the specimen. Reproductive

system amphidelphic, with all he usual parts.

Tail elongate conoid, 235 m or 4.7 analbodywidths long.

Mae The reported male pecimen

not traced

Remarks: Khera (190) identied 3females and 3 males as Actinolaimus mer

coo peri Filipjev 1931 rom Happy Valleybelow Taragarh, Ajmer (Rajasthan) and Padakulam pond, Cranganore, district Trichur(Kerala). Only one badly attened dorsoventrally mounted fmale on side W 194/1om Ajmer was available for study, and it iscorrectly identied as Actinoaimus omer-cooperi.


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BQRI : A taxonoc revison of the Dorylaimida 283

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ACKNOWLEDGEMENT

The uthr thnks Dr B . Tikder,

Director Zoogic Surve of Indi Clcutt

r prvidin reserch ciities

REFEENCES

AND'ssv, I 1959 xnoische iibersicht

der Drlimen (Netd I Acta

zo! ug. 5 3-4) ; 191-240

BQI, H. & ]N, A 1982 Netdes

r West Beng (Indi) XI Fur new

Buleti of the Zooogica Survey f India

species of Doryliide with ke o

the specie f Laimydorus Siddiqi, 196

(oryliida) Nematolgica 8 : 192205

HE, S 1970 Netodes fto the bnks

of sti nd runnin wters X Order

Doryliid Idian J. Helmi XXII :120135

HONE, G 1975 Netodes of Northern

Gret Plins, No 2 Errata. ematoly

ews Letter, 21 : 5

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Baqri 1985 - Revision de Dorylaimida de Khera de India