Memoirs of the Museum of Victoria 49(1): 1-49 (1988)
ISSN 0814-1827
FRESHWATER CRAYFISH OF THE GENUS EUASTACUS CLARK
(DECAPODA: PARASTACIDAE) FROM QUEENSLAND
By Gary J. Morgan
Museum of Victoria, Swanston Street, Melbourne,
Victoria 3000, Australia
Present address: Department of Crustacea, Western Australian Museum, Francis Street,
Perth, Western Australia 6000
Abstract
Morgan, G.J., 1988. Freshwater crayfish of the genus Euastacus Clark (Decapoda: Parastaci-
dae) from Queensland. Memoirs of the Museum of Victoria 49: 1-49.
Twelve species of Euastacus from Queensland, including three new species, E. balanensis,
E. eungella and E. jagara, are described or redescribed, employing external characters, meas-
urement ratios and gastric mill characters. The genus Euastacoides Riek is synonymised with
Euastacus. A key to the Queensland species of Euastacus is included.
Contents
Introduction 1
Key to Queensland species of Euastacus 2
E. balanensis 1
E. eungella 8
E. fleckeri 11
E. hystricosus 15
E. robertsi 19
E. sulcatus 22
E. suttoni 27
E. valentulus 31
E. setosus 35
E. urospinosus 39
E. maidae 42
E. jagara 44
General Remarks 46
Acknowledgements 49
References 49
Introduction
The species of the Australian freshwater cray-
fish genus Euastacus occurring in Victoria have
been reviewed by Morgan (1986) in the first of a
series of papers. This second contribution examines
species found exclusively in Queensland or with
type localities in that state.
The methods and abbreviations employed in this
study are those described by Morgan (1986). Ad-
ditionally, the Queensland Museum, Brisbane, is
abbreviated as QM. Scales in figures 3-25 are in
mm.
The eastern area of Queensland was sampled ex-
tensively for this study in 1981, with particular em-
phasis upon high country of the Great Dividing
Range. Distributions of species are illustrated in
Figures 1 and 2.
Euastacus balanensis sp. nov.
Figures 3, 4
Material examined. Holotype. Qld, tributary of Davies
Ck, Lamb Range, Atherton Tableland, (17°03'S,
145°37'E), 2 Jul 1981, G.J. Morgan and S.J. Harders,
QM W10984, a, OCL 33.0 mm.
Paratypes. Qld. Type locality, QM W10985, 19;
Tributary of Kauri Ck, north of Tinaroo Falls Dam,
Atherton Tableland, (17°06'S, 145°35'E), 1 Jul 1981, G.J.
Morgan and S.J. Harders, QM W10987, 2ct; Maguba
Ck, Mt Bartle Frere, Bellenden Ker Range (17°26'S,
145°50'E), 18 Jul 1981, G.J. Morgan and S.J. Harders,
QM W10986, lo\ 19.
Diagnosis. Male cuticle partition present. Rostral
marginal spines apical or distributed to midlength
of carinae. Rostral base very divergent, carinae
spread. Antennal squame widest at or slightly prox-
imal to midlength. Squamal spines absent. Subor-
bital spine usually medium-sized. Thoracic spines
weakly developed. General tubercles small, moder-
ately to densely distributed. 3-8 medium-sized or
small Li spines on abdominal somite 2. D abdomi-
nal spines and abdominal boss absent. Tailfan
spines absent. Lateral propodal spines usually in
2 to 1 row condition, ventral row poorly developed
(occasionally absent). 0-2 dorsal apical propodal
BioStor
