Excorallana costata Lemos de Castro, 1960

Souza-Filho, Elinai dos Santos Silva Jesser F., 2017, Species of Excorallana (Isopoda, Corallanidae) from northern and northeastern Brazil, with description of a new species, Excorallana lemoscastroi sp. nov., Nauplius (e 2017026) 25, pp. 1-21 : 4-6

Excorallana costata Lemos de Castro, 1960

( Figs. 3 , 4 )

Excorallana costata Lemos de Castro, 1960: 66 , figs. 28–37. – Carvacho and Yañez, 1971: 130. – Coelho and Koening, 1972: 253. – Delaney, 1984: 3. – Delaney 1989: 6. – Pires-Vanin, 1998: 611. – Campos, 2003: 84.

Material examined. 1 sex undefined ( MOUFPE 975 ), AS #1857, Amapá , 3º35’00”S 37º57’00”W, 49 m depth . 6 sex undefined ( MOUFPE 877 ), AS # 2017, Amapá , 3°56’00”N 50°00’07”W, 81 m depth . 1 sex undefined ( MOUFPE 940 ), GM 188, Amapá , 3°57’00”N 50°01’00”W, 87 m depth. ( MOUFPE 951 ) , AS # 1793 A, Amapá , 4°29’05N 50°12’W, 140 m depth . 2 sex undefined ( MOUFPE 958 ), GM 208, Amapá , 4°52’00”N 50°31’05”W, 113 m depth . 1 sex undefined ( MOUFPE 974 ), AS # 1754, Pará , 0º06’00”S 45º50’00”W, 114 m depth . 1 sex undefined ( MOUFPE 961 ), AS #1762 A, Pará , 0º13’00”N 46º55’00”W, 36 m depth . 3 females (2 adults, 1 juvenile), 1 sex undefined ( MOUFPE 952 ), GM 21, Pará , 0°14’05”N 45°04’02”W, 73 m depth . 3 sex undefined ( MOUFPE 944 ), AS # 2467, Pará , 0°52’05”N 47°16’00” W, 43 m depth . 11 females (2 adults, 9 juveniles), 1 sex undefined ( MOUFPE 971 ), GM 2529, Pará , 1°02›00”N 47°11’05”W, 40 m depth . 1 adult female (drawn) ( MOUFPE 957 ), AS # 1767, Pará , 1º32’30”N 47º24’30”W, 63 m depth . 1 adult female ( MOUFPE 942 ), AS # 1722, Ceará , 2º13’30”S 40º43’30”W, 54 m depth . 1 sex undefined ( MOUFPE 956 ), AS #1773, Ceará , 2º40’30”N 48º03’00”W, 103 m depth . 1 adult male ( MOUFPE 950 ), CAN 32, Ceará , 2º52’05”N 38º49’00”W, 72 m depth . 1 adult female ( MOUFPE 991 ), AS #1999, Ceará , 2º57’00”N 49º04’00”W . 6 females (4 adults, 2 juveniles), 4 sex undefined ( MOUFPE 969 ), GM II 116 , Ceará , 2°57’05”N 48°45’00”W . 1 sex undefined ( MOUFPE 960 ), GM II 2413, Ceará , 4º18’08”N 40º43’30”W, 88 m depth . 1 sex undefined( MOUFPE 962 ), PE30 A, Pernambuco , 7º45’00”S 34º43’05”W, 19 m depth . 1 sex undefined ( MOUFPE 963 ), REC 126, Pernambuco , 8º04’08”S 34º47’02”W, 22 m depth . 16 females (15 adults, 1 ovigerous) and 30 sex undefined ( MOUFPE 973 ), SUAPE # 02 , Pernambuco , 8°09’01”S 34º50’07”W, 18 m depth . 1 adult female ( MOUFPE 943 ), REC 117, 8º13’07”S 34º51’03”W, 23.5 m depth . 1 sex undefined ( MOUFPE 948 ), ITA 80, Pernambuco , 7º38’58”S 34º49’00”W . 1 sex undefined ( MOUFPE 967 ), ITA 79, Pernambuco , 7º38’58”S, 34º49’00”W, 0.5 m depth . 2 juvenile females ( MOUFPE 955 ), ITA 73, Pernambuco , 7º41’12”S 34º48’18”W, 3.75 m depth . 1 adult female ( MOUFPE 945 ), ITA 45, Pernambuco , 7º43’34”S 34º49’06”W, 2.1 m depth . 3 sex undefined ( MOUFPE 954 ), PE 29 B, 7º44’00”S 34º46’07”W, 14 m depth . 2 adult females, 1 sex undefined ( MOUFPE 964 ), PE 29 A, Pernambuco , 7º45’00”S 34º46’08”W, 15 m depth . 4 juvenile females ( MOUFPE 970 ), ITA 16 A, Pernambuco , 7º51’00”S 34º49’00”W, 3.9 m depth . 1 adult female ( MOUFPE 946 ), CAN 7, Pernambuco , 8°06’46”S 35°00’53”W, 35 m depth . 1 sex undefined ( MOUFPE 13.232 ), NE III 53 / 2º P, Pernambuco , 8°08’05”S 34°49’07”W, 19.5 m depth . 1 adult male ( MOUFPE 953 ), CAN 8, Pernambuco , 8°15’02”S 34°50’00”W, 27 m depth . 1 sex undefined ( MOUFPE 968 ), REC 111, Pernambuco , 8º16’02”S 34º51’08”W, 25 m depth . 1 sex undefined ( MOUFPE 972 ), Recife 144, Pernambuco, 8º20’09”S 34º48’03”W, 33.5 m depth .

Diagnosis [modified from Lemos de Castro (1960)]. Head without tubercles, with large eyes, almost continuous in the midline of the head. Antennular peduncle with article 1 not dilated. Antenna reaching pereonite 2. Frontal lamina bell-shaped, narrower at middle ( Fig. 17 ). Pereonites 1–5 smooth dorsally, 6 and 7 with double line of tubercles on posterior margin. Pleonite 1 smooth dorsally. Pleonites 2–5 with two transversal lines of tubercles. Pleonite 3 with carina, median longitudinal groove bearing tubercle. Pleotelson triangular, with six tubercles on anterior margin and two lateral incisions. Uropods margins heavily coated with long setae, reaching apex of pleotelson.

Geographic distribution. Brazil: Amapá, Pará, Maranhão, Ceará, Rio Grande do Norte, Pernambuco, Espírito Santo, Rio de Janeiro, São Paulo ( Lemos de Castro, 1960; Coelho and Koening, 1972; this study) ( Fig. 4 ) .

Figures

Figure 3. Excorallana costata Lemos de Castro, 1960. Male, 12 mm. (MOUFPE 957), habitus and frontal lamina. Scale = 2 mm.

Figure 4. Distribution of Excorallana costata Lemos de Castro, 1960 for Brazilian waters.

Figure 17. Morphological variation of the frontal lamina among the Brazilian species of the genus Excorallana.