Jambu, a new genus of tarantula from Brazil (Araneae, Theraphosidae, Theraphosinae) Author Miglio, Laura T. 3D46F4E6-6525-47E5-AD08-E90D9CA6F6AC Museu Paraense Emílio Goeldi, Coordenação de Zoologia, Laboratório de Aracnologia, Av. Perimetral, 1901, Terra Firme, Cep: 66077 - 830, Belém, Pará, Brazil. lauramiglio@gmail.com Author Perafán, Carlos F1E71689-C893-4F21-B756-224AA39A0BE5 Sección Entomología, Facultad de Ciencias, Iguá 4225, 11400 Montevideo, Uruguay. caperafanl@gmail.com Author Pérez-Miles, Fernando 1104EABA-D2D8-49BE-9E4E-FB82735D6E21 Sección Entomología, Facultad de Ciencias, Iguá 4225, 11400 Montevideo, Uruguay. myga@fcien.edu.uy text European Journal of Taxonomy 2024 2024-04-05 930 1 229 248 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2497/11163 journal article 10.5852/ejt.2024.930.2497 2118-9773 10933047 AF6A835B-274E-4DF3-A72D-28FFCC28D926 Jambu paru gen. et sp. nov. urn:lsid:zoobank.org:act: C5408331-6288-47F8-B699- 03091504 FBF1 Figs 1–5 , 10 ; Tables 1–2 Diagnosis Males resemble those of J. manoa gen. et sp. nov. and J. butantan gen. et comb. nov. by the presence of a long filiform embolus but differ from them in the presence of a very developed subtriangular PI together with a serrated PA ( Figs 3 , 4A–B ) and the presence of a retrolateral process on the palpal tibia ( Fig. 1E ). Additionally differs from J. butantan in the absence of PS on palpal bulb ( Figs 3 , 4A–B ). Females differ by the presence of an abdominal pattern with two anterior transverse narrow lines and a posterior brown subtriangular spot ( Fig. 2C ) and by the presence of a single lamp-shaped spermathecal receptacle ( Fig. 4E ). Etymology The specific epithet is a noun in apposition which refers to an isolated indigenous land Rio Paru d’Este, which is in the area of collection, Almeirim, State of Pará , Brazil . Type material Holotype BRAZIL • ♂ ; Pará , Almeirim , Jarí ; 1°11′28″ S , 52°38′52″ W ; 28 Feb. 2005 ; T. Gardner and E. Ribeiro-Júnior leg.; MPEG 7437 . Paratypes BRAZIL • 1 ♀ ; same locality, date and collectors as for holotype; 0°35′28″ S , 52°44′09″ W ; MPEG 7447 • 1 ♂ ; Pará , Almeirim , Jari , Área 56 ; 00°42′42″ S , 52°40′08″ W ; 11 Feb. 2005 ; T. Gardner leg.; CZUFMT-ARA 1303 • 1 ♂ ; Quaruba ; 01°1′32″ S , 52°54′17″ W ; 27 Mar. 2005 ; T. Gardner and M.A. Ribeiro-Júnior leg.; MUSM-ENT 0511103 • 2 ♂♂ ; same collection data as for preceding; MPEG 7446 , MPEG 7441 • 1 ♂ ; Bituba ; 01°11′28″ S , 52°38′51″ W ; 28 Feb. 2005 ; T. Gardner and M.A. Ribeiro-Júnior leg.; MEKRB-UA 971/2005 • 2 ♂♂ ; same collection data as for preceding; MPEG 7448 , MPEG 7450 • 2 ♂♂ ; same locality as for preceding; 7 Mar. 2005 ; T. Gardner leg.; MPEG 7442 • 1 ♂ ; same collection data as for preceding; FCE-MY 1466 • 2 ♂♂ ; same collection data as for preceding; MPEG 7444 • 1 ♀ (examined by scanning electronic microscope); Pará , Almeirim ; 01°1′32″ S , 52°54′17″ W ; 3 Apr. 2005 ; T. Gardner and M.A. Ribeiro-Júnior leg.; MPEG 7440 . Description Male ( holotype MPEG 7437) Total length 24, carapace length 11.50, width 11.13. Anterior eye row procurved, posterior recurved. Eye sizes and interdistances: AME 0.32, ALE 0.56, PME 0.28, PLE 0.42, AME–AME 0.26, AME–ALE 0.16, PME–PME 1.04, PME–PLE 0.12, ALE–PLE 0.16. OQ length 0.93, width 2.04, clypeus 0.40. Fovea transverse, procurved, width 1.66. Labium length 1.44, width 1.66, with 8 cuspules, maxillae with 63 cuspules ( Fig. 1F ). Sternum length 5.25, width 5.06. Posterior sigillae submarginal ( Fig. 1D ). Chelicerae with 10 teeth on furrow promargin (some of them smaller), and with 31/27 small teeth in proximal group behind promarginal line. Tarsi I–IV densely scopulated, scopula I–III entire, IV divided by narrow line of longer conical setae. Metatarsi I scopulate on distal half, II scopulate on distal 1/6, III apically scopulate, IV not scopulate. Tibia I with prolatero-ventral, distal double apophysis with basis fused and branches convergent, two megaspines on retrolateral branch ( Fig. 4C–D ). Flexion of metatarsus I retrolateral regarding retrolateral branch. Palpal bulb piriform, with developed subtriangular PI and PA with several granulations present on edge; TA present and well developed, embolus filiform, long ( Figs 3 , 4A–B ). Palpal tibia with setose retrolateral process ( Fig. 1E ) and field of four spines (one basal three distal) on prolateral face. Length of leg and palpal segments in Table 1 . Spination: femora I–II 1p; III 1r; IV 0; palp 1p. Patellae I–IV 0; palp 0. Tibiae I 4r, 1v; II 2p, 2r, 8v; III 4p, 3r, 4v; IV 5p, 3r, 4v; palp (short spines) 11p, 1v; 4d. Metatarsi I 2p, 2r, 3v; II 2p, 4r, 4v; III 4p, 3r, 5v, 7d; IV 11p, 3r, 4v, 10d; tarsi I–IV and palp 0. Color: cephalothorax and legs and dorsal abdomen brown with pattern of two transverse lines and a spot light brown on ventral abdomen pale brown ( Fig. 1 ). Type IV urticating setae present ( Fig. 5A–B ). PMS well developed, PLS normal, apical segment digitiform ( Fig. 1B ). Fig. 1. Jambu paru gen. et sp. nov. , holotype, ♂ (MPEG 7437). A . Abdomen, dorsal view. B . Abdomen, ventral view. C . Carapace, dorsal view. D . Sternum, ventral view. E . Distal right palp and bulb, retrolateral view (arrow shows retrolateral tibial process). F . Oral region, ventral view. G . Right cymbium, ventral view. Table 1. Length of legs and palpal segments of male holotype of Jambu paru gen. et sp. nov. (MPEG 7437).

I	II	III	IV	Palp
Fe	9.9	9.4	7.4	10.9	7.3
Pa	6.0	4.9	4.9	4.8	3.6
Ti	9.1	6.6	6.3	8.4	5.3
Mt	6.8	7.0	8.9	13.5	–
Ta	4.3	3.9	3.9	4.1	1.8
Total	36.1	31.8	31.4	41.7	18.0

Fig. 2. Jambu paru gen. et sp. nov. , paratype, ♀ (MPEG 7447). A . Carapace, dorsal view. B . Oral region, ventral view. C . Abdomen, dorsal view. D . Abdomen, ventral view. E . Sternum, ventral view. Table 2. Length of legs and palpal segments of female paratype of Jambu paru gen. et sp. nov. (MPEG 7447).

I	II	III	IV	Palp
Fe	6.2	5.5	5.1	6.3	5.0
Pa	4.3	3.2	3.5	3.3	3.2
Ti	4.2	3.1	3.0	4.6	3.3
Mt	2.9	3.2	4.6	6.7	–
Ta	2.4	2.2	2.4	2.6	4.1
Total	20	17.2	18.6	23.5	15.6

Fig. 3. Jambu paru gen. et sp. nov. , holotype, ♂ (MPEG 7437), left palpal bulb. A . Prolateral view. B . Retrolateral view. C . Dorsal view. D . Ventral view. Arrows show the embolus. Abbreviations: PA = paraembolic apophysis; PI = prolateral inferior keel. Female ( paratype MPEG 7447) Total length 23.50, carapace length 10.25, width 9.88. Anterior eye row procurved, posterior row slightly recurved. Eye sizes and interdistances: AME 0.24, ALE 0.46, PME 0.28, PLE 0.38, AME–AME 0.32, AME–ALE 0.28, PME–PME 0.96, PME–PLE 0.08, ALE–PLE 0.14. OQ length 0.80, width 1.92, clypeus 0.58. Fovea slightly procurved, width 1.72. Labium length 1.40, width 1.76, with 11 cuspules, maxillae with 72 cuspules ( Fig. 2B ). Sternum length 4.1, width 4.5. Posterior sigillae submarginal ( Fig. 2E ). Chelicerae with 11/12 teeth on furrow promargin (some of them smaller) and 19/21 smaller in group, basally, behind large ones. Tarsi densely scopulate, scopula I entire, II divided by a narrow line of longer conical setae, III–IV divided by a wide band of longer conical setae. Metatarsi I scopulate on apical half, II scopulate on apical ¼, III apically scopulate, IV without scopula. Length of leg and palpal segments in Table 11. Spination: femora I–IV and palp 0. Patellae I–IV and palp 0. Tibiae I–II 0; III 1v; IV 1v; palp 3v. Metatarsi: I 4v; II 1p 3v; III 3p, 3r, 4v, 1d; IV 4p, 6r, 7v, 1d. Palp 0. Tarsi I–IV and palp 0. Color: carapace and legs reddish brown; dorsal abdomen dark brown with two light transverse stripes and spot ( Fig. 2 ) ventral abdomen pale brown. Type IV (central abdomen, Fig. 5C–D ) and intermediate III–IV (lateral abdomen) urticating setae present. PMS slightly smaller than in male, PLS as in male ( Fig. 2D ). Spermathecae with one medial lamp-shaped receptacle ( Fig. 4E ). Fig. 4. Jambu paru gen. et sp. nov. A–D . Holotype, ♂ (MPEG 7437). E . Paratype, ♀ (MPEG 7447). A–B . Left palpal bulb. A . Prolateral view. B . Retrolateral view. C–D . Left tibial apophysis. C . Ventral view. D . Prolateral view. E . Female spermathecae, ventral view. Arrows show embolus. Abbreviations: PA = paraembolic apophysis; PI = prolateral inferior keel. Scale bars = 1 mm. Distribution Known only from type-locality, Brazil , State of Pará , Almeirim, Jari ( Fig. 10 ).