Papiri, Rheims, 2025

Papiri gen. nov.

Type species. Papiri caete sp. nov.

Etymology. The generic name is a noun in apposition taken from the Tupi-Guarani language meaning shelter or refuge and refers to the male palp sclerotized conductor that covers the tip of the embolus; gender masculine.

Diagnosis. Species of Papiri gen. nov. resemble those of Extraordinarius , Pleorotus , Rhacocnemis , Stipax , Thelcticopis and Thomasettia by the male palps with a sclerotized conductor. They are distinguished from Pleorotus , Stipax and Thomasettia by the eyes arranged in two relatively straight rows or with posterior row slightly procurved (e.g. Figs 19 View FIGURES 17–20 , 32 View FIGURES 32–35 , 49 View FIGURES 47–50 , 65 View FIGURES 63–66 ) (two recurved rows in the latter genera), from Rhacocnemis and Thelcticopis by the presence of only two retromarginal teeth in the chelicerae ( Fig. 1 View FIGURES 1–6 ) (more than four in the latter two genera), and from Extraordinarius by the male palps with a T-shaped, hood-like conductor with one end of the hood modified and curved (Hc) the other simple and rounded (e.g. Figs 27 View FIGURES 26–31 , 42 View FIGURES 41–46 , 57 View FIGURES 56–62 ) (Z-shaped in Extraordinarius ). Females are distinguished from those of the latter genera by the vulva with IDS divided into a proximal hyaline part (Dh) connecting to a distal sclerotized (Ds) part (e.g. Figs 25 View FIGURES 21–25 , 40 View FIGURES 36–40 , 55 View FIGURES 51–55 , 71 View FIGURES 67–71 ).

Description. Coloration pattern: prosoma brown, slightly darker along thoracic striae and lateral margins of cephalic region; fovea darker brown; eye borders black. Legs brownish orange. Palps lighter than legs. Labium brown, distally cream colored. Endites pale brown, distally yellowish cream colored. Sternum yellowish cream colored with brownish margins. Opisthosoma grayish cream colored; dorsally with dark brown pattern of irregular marks scattered laterally and around cardiac mark and seven chevron-like marks down posterior half; ventrally with wide, dark brown U-shaped mark with dark brown longitudinal mark in the middle and few scattered brown marks laterally (except P. cabruca sp. nov., without U-shaped mark) ( Figs 17–18 View FIGURES 17–20 , 32–33 View FIGURES 32–35 , 47–48 View FIGURES 47–50 , 63–64 View FIGURES 63–66 ). Spinnerets yellowish brown, distally pale yellow. Coloration pattern in females as in males ( Figs 19–20 View FIGURES 17–20 , 34–35 View FIGURES 32–35 , 49–50 View FIGURES 47–50 , 65–66 View FIGURES 63–66 ). Total length of males 7.1–13.2, of females 10.4–17.0. Dorsal shield of prosoma longer than wide. Cephalic region slightly higher than thoracic region, flattening posteriorly. Fovea conspicuous on posterior third of prosoma. Eyes arranged in two straight rows;AME larger than ALE, more separated from each other than from laterals; PME smaller than PLE, mostly equidistant (e.g. Figs 17 View FIGURES 17–20 , 34 View FIGURES 32–35 , 47 View FIGURES 47–50 , 65 View FIGURES 63–66 ). Clypeus low, less than ALE diameter. Chelicerae longer than wide with three promarginal teeth, the basal one smallest, and two small retromarginal teeth. Intermarginal teeth absent. Internal margin with one escort setae ( Fig. 1 View FIGURES 1–6 ). Labium rebordered, as wide as long. Endites slightly convergent, longer than wide, with dense scopula on internal margin. Serrula with single row of denticles ( Fig. 2 View FIGURES 1–6 ). Sternum longer than wide, slightly projected between coxae IV. Female palp with single pectinate claw with six short teeth ( Fig. 6 View FIGURES 1–6 ); sensory setae long, distally curved, with barbules along the entire setae and with distal region bearing a large, rounded pore and a single filiform extension, scattered dorsally along tarsus. Legs laterigrade, mostly 4123 but can be 1423 or 4213. Spination pattern in males: femora I–III: p1-1-1, d0-1-1, r1-1-1; femur IV: p1-1-1, d0-11, r0-1-1; patellae I–IV: p0, r0; tibiae I–II: p1-0-1, d0-0-1; r1-0-1, v3–6 pairs; tibiae III–IV: p1-0-1; d0-0-1; r1-0-1; v2-2-2; metatarsi I–II: p1-1-1; r1-1-0; v2-0-0; metatarsus III: p1-1-1; r1-1-0; v2-2-0; metatarsus IV: p1-1-1; r1-1-1; v2-2-0. Palp: femur: p0-0-1; d0-1-2; r0; patella: p1, r1; tibia: p2-1-0; d1-0-0; r0; in females: Femora I–III: p1-1-1, d0-1-1, r1-1-1; femur IV: p1-1-1, d0-11, r0-1-1; patellae I–IV: p0, r0; tibiae I–II: v4–6 pairs; tibia III: v2-2-2; tibia IV: p1-0-1; r1-0-1; v2-2-2; metatarsi I–III: v2-0-0; metatarsus IV: p1-1-1; r1-1-1; v2-2-0. Palp: femur: p0-0-1; d0-1-2; r0-0-1; tibia: p2-1-0; r1-1-0; tarsus: p2-1-0; r1-1-0. Trochanter smooth. Metatarsi I–IV distally with dorsal trilobate membrane with median hook much smaller than lateral projections ( Fig. 3 View FIGURES 1–6 ). Tarsi and anterior half of metatarsi scopulate. Trichobothria present on dorsal tibiae, metatarsi and tarsi, arranged in several rows on tarsi, converging to a single row on metatarsi. Dorsal plate with 6–7 transversal rows, projecting over a smooth proximal plate. Trichobothrial seta base thickened in a basal bulb ( Fig. 4 View FIGURES 1–6 ). Tarsal organ capsulate, with tear-drop-shaped opening, located dorsally, at distal end of tarsi ( Fig. 5 View FIGURES 1–6 ). Tarsi with pair of pectinate claws with 9–12 small teeth with claw tufts. The distal teeth inserted entally and the proximal ones inserted ectally ( Figs 7–10 View FIGURES 7–12 ). Opisthosoma oval, longer than wide. Male epiandrium with small groups of epiandrous spigots ( Fig. 11 View FIGURES 7–12 ). Colulus triangular with sparse setae ( Fig. 12 View FIGURES 7–12 ). Six spinnerets: anterior lateral spinnerets contiguous, conical and bi-segmented. Basal segment elongated and cylindrical, distal segment short and truncated. Posterior median spinnerets conical and short. Posterior lateral spinnerets conical and bi-segmented. Basal segment elongated and cylindrical, distal segment short and truncated. Male palp: tibia short, less than half cymbium length with three long prolateral spines (two in P. tacomare sp. nov.) and one dorsal spine; VTA triangular (inconspicuous in P. cabruca sp. nov.); RTA inserted distally, single ( Figs 28 View FIGURES 26–31 , 43 View FIGURES 41–46 ), with two ( Fig. 74 View FIGURES 72–77 ) or three ( Fig. 58 View FIGURES 56–62 ) branches; cymbium oval, with large RbP and small rounded scopulae dorsally on distal third; alveolus oval; ST cup-shaped; spermophore ring-like, narrowing at the base of the embolus; TBE hyaline, keel-like, distally extending towards retrolateral margin of cymbium; TBC laminar, partially sclerotized ( Figs 27 View FIGURES 26–31 , 42 View FIGURES 41–46 ) or reduced to a sclerotized area ( Fig. 73 View FIGURES 72–77 ) or elevation ( Fig. 57 View FIGURES 56–62 ); C sclerotized, hood-shaped, with basal end curved, arising from the center of the tegulum; E arising from tegulum between 7–9 o’clock positions, filiform ( Figs 27 View FIGURES 26–31 , 73 View FIGURES 72–77 ), with subdistal projection ( Fig. 42 View FIGURES 41–46 ) or modified tip ( Fig. 59 View FIGURES 56–62 ); MA arising from the center of the tegulum, cup-shaped ( Figs 27 View FIGURES 26–31 , 57 View FIGURES 56–62 , 73 View FIGURES 72–77 ) or knob-shaped ( Fig. 42 View FIGURES 41–46 ). Female epigyne: EF as wide as long or longer than wide with anterior lateral MAB conspicuous or imbedded; LL smooth ( Figs 44 View FIGURES 41–46 , 75 View FIGURES 72–77 ) or with posterior, lateral projections ( Figs 29 View FIGURES 26–31 , 60 View FIGURES 56–62 ), partially covering MS ( Figs 60 View FIGURES 56–62 , 75 View FIGURES 72–77 ) or partially covered by MS ( Figs 29 View FIGURES 26–31 , 44 View FIGURES 41–46 ); anterior grove straight or slightly recurved ( Figs 60 View FIGURES 56–62 , 75 View FIGURES 72–77 ) or projecting over MS, forming a scape-like structure ( Figs 29 View FIGURES 26–31 , 44 View FIGURES 41–46 ). Vulva: IDS divided into a proximal, expanded hyaline part (Dh), closer to CO, connecting to a distal sclerotized part (Ds) closer to FD; FD short and hook shaped ( Figs 30 View FIGURES 26–31 , 45 View FIGURES 41–46 , 61 View FIGURES 56–62 , 76 View FIGURES 72–77 ).

Composition. Papiri cabruca sp. nov., P. cacau sp. nov., P. caete sp. nov., and P. tacomare sp. nov.

Distribution. Known from the Atlantic Forest, from the state of Paraíba to the state of Santa Catarina, and from northeastern Pará, all in Brazil ( Figs 78–81 View FIGURES 78–81 ).

Identification key for all species of Papiri gen. nov.

1 Males .............................................................................................. 2

- Females............................................................................................ 5

2(1) RTA single, with no branches ( Figs 23 View FIGURES 21–25 , 28 View FIGURES 26–31 , 38 View FIGURES 36–40 , 43 View FIGURES 41–46 )........................................................... 3

- RTA with two or three branches ( Figs 53 View FIGURES 51–55 , 58 View FIGURES 56–62 , 69 View FIGURES 67–71 , 74 View FIGURES 72–77 )......................................................... 4

3(2) MA small, knob-like ( Figs 15–16 View FIGURES 13–16 , 37 View FIGURES 36–40 , 42 View FIGURES 41–46 ); embolus with subdistal filiform projection ( Fig. 42 View FIGURES 41–46 ).......... P. cacau sp. nov.

- MA large, cup-shaped, with strongly indented margin; embolus filiform, without projections ( Figs 22 View FIGURES 21–25 , 27 View FIGURES 26–31 ).................................................................................................... P. cabruca sp. nov.

4(2) RTA with three branches ( Figs 53 View FIGURES 51–55 , 58 View FIGURES 56–62 ); embolus tip complex, with many projections ( Figs 13–14 View FIGURES 13–16 , 59 View FIGURES 56–62 )...... P. caete sp. nov.

- RTA with two branches ( Figs 69 View FIGURES 67–71 , 74 View FIGURES 72–77 ); embolus filiform without projections ( Figs 68 View FIGURES 67–71 , 73 View FIGURES 72–77 )............. P. tacomare sp. nov.

5(1) LL partially covering MS; anterior groove straight or slightly recurved ( Figs 54 View FIGURES 51–55 , 60 View FIGURES 56–62 , 70 View FIGURES 67–71 , 75 View FIGURES 72–77 ).......................... 6

- MS partially covering LL; anterior groove projecting posteriorly over MS ( Figs 24 View FIGURES 21–25 , 29 View FIGURES 26–31 , 39 View FIGURES 36–40 , 44 View FIGURES 41–46 )....................... 7

6(5) MS slightly longer than wide; posterior margin at level with posterior margin of LL ( Figs 54 View FIGURES 51–55 , 60 View FIGURES 56–62 ).......... P. caete sp. nov.

- MS slightly wider than long; posterior margin reaching slightly over half LL length ( Figs 70 View FIGURES 67–71 , 75 View FIGURES 72–77 )...... P. tacomare sp. nov.

7(5) LL smooth, without posterior projections; MS with posterior margin surpassing the posterior margin of LL ( Figs 39 View FIGURES 36–40 , 44 View FIGURES 41–46 ).......................................................................................... P. cacau sp. nov.

- LL with posterior lateral projections; MS with posterior margin not reaching the posterior margins of LL ( Figs 24 View FIGURES 21–25 , 29 View FIGURES 26–31 ).......................................................................................... P. cabruca sp. nov.