Cajango, Kury & Bernabé, 2023

Kury, Adriano B. & Bernabé, Tiago, 2023, Description of two new genera and five new species of clade K 92 from Bahia and Espírito Santo, southeastern Brazil (Arachnida, Opiliones, Gonyleptidae), Zootaxa 5351 (4), pp. 401-434 : 404-405

Cajango gen. nov.

urn:lsid:zoobank.org:act:33E35006-4961-4734-B156-9AFEB5666051

“Undescribed genus CAE-01”, Kury et al. 2022: 80.

Etymology. Cajango is the name of the protagonist of the novel Corpo Vivo (1962) by the Brazilian writer Adonias Filho (1915–1990), which is set in the forests of Camacan (the type locality of the type species). Gender masculine.

Type species. Cajango camacanensis sp. nov., hereby designated.

Included species. Cajango camacanensis sp. nov., Cajango pestifer sp. nov. and Cajango vindicator sp. nov.

Diagnosis. Ocularium armed with a pair of robust, slightly divergent spines in both sexes ( Figs. 4a, b , 7c, g , 11a, b ). Armature of area III sexually dimorphic: low tubercles in males ( Fig. 4a ), spines in females ( Fig. 4d ). Tr IV of males with a pair of robust, divergent, retroapical spines, unique within clade K92 ( Figs. 7a, e ). Male genitalia: Apical prongs of penis VP without ears ( Figs. 6a, c ). Stylus and ventral process of glans inserted almost in parallel to each other ( Fig. 6b ). MS A and B robust, subequal ( Fig. 6b ). VP subrectangular, elongate, and with a deep parabolic cleft on the apical border that defines two tapering prongs ( Figs. 6a, c ). Lateral distal borders of VP not forming a flange ( Fig. 9b ). Basal lobe of VP well developed towards dorsal surface, protruding laterally only in C. camacanensis sp. nov., with robust macrosetae A1–A3 and B1, all subequal ( Figs. 6a, b, c ). Supernumerary A4 only in some individuals of C. pestifer sp. nov. MS C1–C3 slender and twisted, all clustered on distal part of lateral border of VP ( Fig. 6a ). No flange, MS E1–E2 very short, almost collinear with C1–C3, although slightly more ventral. D1 minute, aligned with MS C. Ventral surface of VP covered with simple microsetae (type 1 of Kury 2016). Podium of truncus deeply concave on the sides which are formed by a soft wrinkled region. Flabellum diamond-shaped, with borders finely serrated (coarsely serrated in C. pestifer sp. nov.). Stylus inserted on glans in acute angle with its ventral process. Stylus straight without well-marked head. Glans sac cubic.

Distribution ( Fig. 2 ). All species of Cajango gen. nov. occur in a small area in southern Bahia state, between de Contas and Jequitinhonha Rivers.

Key to the species of Cajango gen. nov.

1. Dorso-apical apophysis of Cx IV much shorter than Tr IV in situ ( Fig. 3c ); scutal area III with two acuminate high spines ( Fig. 4d ); Fe IV retroventral with row of subequal spines ( Fig 1c )......................................... (females)… 2

1’. Dorso-apical apophysis of Cx IV as long as Tr IV in situ ( Fig. 3a ); scutal area III with two low, blunt tubercles ( Fig. 4a ); Fe IV retroventral with a few clearly larger spines ( Fig 5 ).................................................(males) …. 4

2. Body background color brown ( Fig. 3c ); scutal areas with several granules ( Fig 3c )............. C. camacanensis sp. nov.

2’. Body background yellow, with carapace and area III more strongly shaded in brown ( Fig. 10c ); scutal areas only with a pair paramedian granules each ( Fig. 10c )...................................................................... 3

3. Anal operculum with a small tubercle ( Fig. 7d )................................................ C. pestifer sp. nov.

3’. Anal operculum with large cardioid apophysis ( Figs. 10c, d ; 11d )............................... C. vindicator sp. nov.

4. Fe IV with dorso-basal, anvil-shaped apophysis ( Fig. 7a ); Tr IV with two apical, very large retrolateral spines, longer than Tr IV width ( Fig. 7e ); Fe IV with sub-basal, retroventral comb of small spines, followed by a large spine ( Fig. 8 ); Fe IV dorsal with row of strong spines ( Fig. 7 c, h ); anal operculum with a small tubercle........................... C. pestifer sp. nov.

4’. Fe IV without dorso-basal apophysis; Tr IV with two small, apical, retrolateral spines, much shorter than Tr IV width; Fe IV without sub-basal, retroventral comb of small spines; Fe IV dorsal without row of spines; anal operculum with large, rounded apophysis........................................................................................... 5

5. Body background color brown ( Fig. 3a ); scutal areas with several granules ( Fig. 3a ); Cx IV with retrolateral apical spiniform apophysis ( Fig. 3b )................................................................. C. camacanensis sp. nov.

5’. Body background yellow, with carapace and area III more strongly shaded in brown ( Fig. 10a ); scutal areas only with pair paramedian granules each ( Fig. 10a ); Cx IV without retrolateral, apical apophysis ( Fig. 10b ).......... C. vindicator sp. nov.

Figures

FIGURE 1. Examples in vivo of some of the species treated in this paper: a–c. Cajango camacanensis sp. nov., a. Alpha male, from Una, Bahia State, Brazil; b. Beta male from São José da Vitoria, Bahia State, Brazil; c. Female from Una, Bahia State, Brazil; d. Titanoleptes calcar (Roewer, 1913), male from Prado, Bahia State, Brazil; e–f. Titanoleptes hyperion sp. nov. from Braço do Sul, Espirito Santo State, Brazil, e. Male, f. Female. Photos by A. Anker & P. Martins (a–d) and A.B. Kury (e–f). All used with permission.

FIGURE 2. Eastern Brazil, showing the distribution of the three species of the genus Cajango gen. nov. in southern Bahia state, with adjacent states shown for context.

FIGURE 3. Cajango camacanensis sp. nov., male (MNRJ 19390) and female (MNRJ 19150) from Camacan: a. Male, habitus, dorsal view; b. Same, ventral view; c. Female, habitus, dorsal view; d. Same, ventral view. Scale bars = 1 mm.

FIGURE 4. Cajango camacanensis sp. nov., male (MNRJ 19390) and female (MNRJ 19150) from Camacan: a. Male, habitus, sinistrolateral view; b. Same, frontal view; c. Same, posterior view; d. Female, habitus, sinistrolateral view. Scale bars = 1 mm.

FIGURE 5. Cajango camacanensis sp. nov., male holotype (MNRJ 19390), from Camacan, femur IV (each figure is rotated 90° along the proximal-distal axis relative to each adjacent one). From the top: retrolateral view, ventral view, prolateral view and dorsal view.

FIGURE 6. Cajango camacanensis sp. nov., male paratype (MNRJ 19150), from Camacan, genital morphology: a. Penis, distal part, dorsal view; b. Same, sinistrolateral view; c. Same, ventral view.

FIGURE 7. Cajango pestifer sp. nov., habitus, male holotype and female paratype (MNRJ 5430), from Ilhéus: a. Male, dorsal view; b. Female same; c. Male, lateral view; d. Female, same; e. Male, ventral view; f. Female, same; g. Male, frontal view; h. Male, posterior view. Scale bars = 1 mm.

FIGURE 8. Cajango pestifer sp. nov., male holotype (MNRJ 5430), from Ilhéus: Femur IV, ventral view. Scale bar = 1 mm.

FIGURE 9. Cajango pestifer sp. nov., habitus, male holotype (MNRJ 5430), from Ilhéus, male genitalia: a. Dorsal view; b. Dextrolateral view; c. Flabellum, apical view; d. Glans, sinistrolateral view; e. Ventral plate, ventral view. Scale bars: 100 μm (a, b, e), 50 μm (d), 20 μm (c).

FIGURE 10. Cajango vindicator sp. nov., male holotype and female paratype (MNRJ 9053), from Ilhéus: a. Male, habitus, dorsal view; b. Same, ventral view; c. Female, habitus, dorsal view; d. Same, ventral view. Scale bars = 1 mm.

FIGURE 11. Cajango vindicator sp. nov., male holotype and female paratype (MNRJ 9053), from Ilhéus: a. Male, habitus, sinistrolateral view; b. Same, frontal view; c. Same, posterior view; d. Female, habitus, sinistrolateral view. Scale bars = 1 mm.