Tegano Barnard & Karaman, 1982

Lowry, J. K. & Springthorpe, R. T., 2009, Melitidae, the Melita group *, Zootaxa 2260 (1), pp. 718-735 : 730

Tegano Barnard & Karaman, 1982

Tegano Barnard & Karaman, 1982: 176 . –– Barnard & Barnard, 1983: 674. ––Sawicki & Holsinger in Sawicki, Holsinger & Iliffe, 2005: 49. Type species. Melita seticornis Bousfield, 1970 , original designation.

Quadrus G. Karaman, 1984: 132 . Type species. Quadrus vagabundus G. Karaman, 1984 , original designation.

Sriha Stock, 1988: 89 (replacement name for Quadrus , preoccupied).

Caledopisa Stock & Iliffe, 1995: 264 . Type species. Caledopisa levis Stock & Iliffe, 1995 , original designation.

Included species. Tegano includes 8 species: T. atkinsae sp. nov.; T. barnardi Sawicki & Holsinger, 2005 ; T. clavatus Sawicki & Holsinger, 2005 ; T. levis ( Stock & Iliffe, 1995) ; T. panglaoensis Sawicki & Holsinger, 2005 ; T. seticornis ( Bousfield, 1970) ; T. shiodamari ( Yamato, 1995) ; T. vagabundus (G. Karaman, 1984) .

Diagnosis. Mandibular palp reduced in size, with 1 to 3 articles; if 3 articles then article 2 longer than article 3. Maxilla 1 inner plate long, subrectangular with distal setae. Maxilla 2 inner plate without oblique setal row, with setae along inner margin. Lower lip with inner lobes. Gnathopod 1 coxa anteroventral corner not produced. Gnathopod 2 dactylus closing across palm. Pereopod 4 coxa, posteroventral lobe absent. Uropod 3 inner ramus scale-like; outer ramus much longer than peduncle, with 2 articles.

Remarks. A number of authors (eg. Karaman 1984; Stock & Iliffe 1995; Sawicki, Holsinger & Iliffe 2005) have considered the reduced mandibular palp as a diagnostic character for Tegano . This is probably a good generic level character, but the amount of reduction appears to vary among species. Based mainly on the reduced number of articles in the mandibular palp, Sawicki, Holsinger & Iliffe (2005) placed five species in Tegano : T. barnardi Sawicki & Holsinger, 2005 ; T. clavatus Sawicki & Holsinger, 2005 ; T. panglaoensis Sawicki & Holsinger, 2005 ; T. seticornis ( Bousfield, 1970) ; and T. vagabunda (G. Karaman, 1984) . Based on the amended diagnosis presented above, three additional species are included in the genus, T. atkinsae sp. nov., from the Great Barrier Reef, T. levis ( Stock & Iliffe, 1995) from New Caledonia and T. shiodamari ( Yamato, 1995) from Japan. All species in this genus occur in reduced salinities or freshwater habitats near the sea or in marine habitats with freshwater input.