Mallacoota J.L. Barnard, 1972

HUGHES, L. E., 2011, New species of Hoho, Mallacoota and Parelasmopus (Maeridae: Amphipoda) from Australian waters, Zootaxa 2955 (1), pp. 1-79 : 32

publication ID	https://doi.org/10.11646/zootaxa.2955.1.1
persistent identifier	https://treatment.plazi.org/id/7D26A779-EB46-4053-FF64-D453FE466C65
treatment provided by	Felipe (2021-08-23 16:07:19, last updated 2023-11-09 23:57:15)
scientific name	Mallacoota J.L. Barnard, 1972
status

Treatment

Mallacoota J.L. Barnard, 1972 View in CoL

Diagnosis. Including the characters of the family with: well developed eyes; cheek notch/slit with rounded or subacute anteroventral corner; antenna 1 accessory flagellum short to minute; madibular palp 3-articulate, article 1 not distally swollen, article 2 never shorter than article 1, article 3 rectolinear; maxillipedal palp distomedial flap on the third article; coxa 1 produced anteroventrally; pleonites and urosomites without dorsally serrate posterodistal margins; urosomite 1 dorsally bicarinate.

Remarks. The genus Ifalukia J.L. Barnard, 1972 is presently diagnosed by characters that place it between Elasmopus Costa, 1853 , Mallacoota and Parelasmopus , with the mandibular palp article 1 longer than article 2 ( Parelasmopus ), mandibular palp article 3 rectilinear ( Mallacoota , Parelasmopus ), epimeron 3 posterior margin not serrate ( Elasmopus , Mallacoota ) and urosomite 1 smooth and non-bicarinate ( Elasmopus ). The new species M. barnardi sp. nov. described below, prompts a re-evaluation of these genera. Mallacoota barnardi fits the generic concept of Ifalukia , but, through a striking series of species level characters (see below), it appears to be closely related to a number of described species of Mallacoota than the potential generic congener Ifalukia resacus (J.L. Barnard, 1965) .

To avoid such a paradox, the new species is placed with its apparent allies, Mallacoota magnimerus Appadoo & Myers, 2006 , M. subinsignis Ledoyer, 1979 and M. sculpulosa Lowry & Hughes, 2009 , without expanding the generic concept of the Mallacoota . The species is considered as an exception within the genus on the basis of urosomite 1 smooth, not dorsally bicarinate.

There are 30 species described in the genus Mallacoota : M. balara Berents, 1983 ; M. barnardi sp. nov.; M. bulowara sp. nov.; M. caerulea Appadoo, Myers & Fagoonee, 2002 ; M. capricornia Lowry & Hughes, 2009 ; M. carausui Ortiz, 1976 ; M. chandaniae Lowry & Springthorpe, 2005 ; M. diemenensis ( Haswell, 1879) ; M. euroka Lowry & Springthorpe, 2005 ; M. insignis ( Chevreux, 1901) ; M. kameruka Lowry & Springthorpe, 2005 ; M. kunmunyah sp. nov.; M. latibrachioides ( Sivaprakasam, 1969b) ; M. latibrachium ( Walker, 1905) ; M. latidactylus Ledoyer, 1982 ; M. magnimerus Appadoo & Myers, 2006 ; M. malua Lowry & Springthorpe, 2005 ; M. maridwinae sp. nov.; M. nananui Myers, 1985 ; M. odontoplax ( Pirlot, 1936) ; M. penelope sp. nov.; M. petriei ( Thomson, 1882) ; M. schellenbergi Ledoyer, 1984 ; M. scopulosa Lowry & Hughes, 2009 ; M. sirius sp. nov.; M. sokotrae ( Walker & Scott, 1903) ; M. subcarinata ( Haswell, 1879) ; M. subinsignis Ledoyer, 1979 ; M. unidentata Ren, 1998 and M. worimi sp. nov.

References

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Ren, X. (1998) Studies on the Family Melitidae (Crustacea: Amphipod) from Nansha Island South China Sea. Studies on Marine Fauna and Flora of the Nansha Islands and Neighbouring Waters, 3,195 - 218.

Sivaprakasam, T. E. (1969 b) Amphipods of the genera Maera Leach and Elasmopus Costa from the East Coast of India. Journal of the Marine Biological Association of India, 10 (1), 34 - 51.

Thomson, G. M. (1882) Additions to the crustacean fauna of New Zealand. Transactions and Proceedings of the New Zealand Institute 14, 230 - 238, pls 217, 218.

Walker, A. O. & Scott, A. (1903) Crustacea; Malacostraca. II. Decapod and sessile-eyed crustaceans from Abd-el-Kuri: Macrura and Edriophthalma. Liverpool Museum Special Bulletin: 216 - 232, pl. 14, figs 1 - 1 i

Walker, A. O. (1905) Marine crustaceans. XVI. Amphipoda. Fauna and Geography of the Maldive and Laccadive Archipelagos 2, 923 - 932, pl. 988.