Geogarypus gollumi, Bedoya-Roqueme & Tizo-Pedroso & Barbier & Lira, 2023

Bedoya-Roqueme, Edwin, Tizo-Pedroso, Everton, Barbier, Eder & Lira, André Felipe De Araújo, 2023, Two new cave-dwelling pseudoscorpion species (Arachnida: Pseudoscorpiones) from Northeastern Brazil, Zootaxa 5293 (2), pp. 317-332 : 321-324

Geogarypus gollumi n. sp.

Figs. 1 – 2 , 5 – 14

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Material examined. Female holotype: Pernambuco, Brazil: Meu Rei cave , 08°29’14.1”S, 37°16’48.8”W, 777 m a.s.l., 19-I-2016, Catimbau National Park , E. Barbier leg. ( LECA; Ps-013). Paratypes: Brazil: 1 male, Pernambuco, Meu Rei cave , 08°29’14.1”S, 37°16’48.8”W, 777 m a.s.l., 19-I-2016, Catimbau National Park , E. Barbier leg. ( LECA; Ps-014); 1 female, Pernambuco, Meu Rei cave, 08°29’14.1”S, 37°16’48.8”W, 777 m a.s.l., 19-I-2016, Catimbau National Park, E. Barbier leg. ( LECA; Ps-015) .

Diagnosis. Geogarypus gollumi sp. nov. differs from the other species of the genus Geogarypus Chamberlin, 1930 by the trichobothrium ib basal to est, and is not distal to esb. Fixed finger chelal with 26 teeth and four larger teeth (male, with 20 teeth and four larger teeth), movable finger with 11 cusp-shaped teeth (male, with 10 cusp-shaped teeth), and the remaining teeth, basal and flattened; female, femur pedipalpal 3.5× (male, 3.5×); patella 2.3× (male, 2.2×); leg I and IV diplotarsate.

Adults. Both females and males. Carapace and pedipalps dark brown, granulated. Carapace with a pale-yellow median zone, a dark brown longitudinal stripe, which extends from the posterior furrow to the posterior margin. Tergites with several dark brown zones on lateral margins, and the center of each. All legs light yellow. All setae short pin-shaped ( Figs. 1 – 2 ).

Chelicera (female and male), with five setae on hand, all setae acuminate, ls shorter, fixed finger with one apical tooth, followed by one small tooth, two larger teeth, and two small teeth ( Fig. 6 ). Galea of female slender with nine small branches ( Fig. 7 ), male galea is less slender than the female and simple. Rallum with a long and simple blade ( Fig. 8 ); serrula exterior with 15 blades.

Pedipalps slender, densely granulated, partially irregular, all setae short pin-shaped ( Figs. 9 – 10 ). Femur 3.5× (male 3.4×), only slightly curved, with a distinct pedicel; patella 2.3× (male 2.2×). Chela with rounded hand, fingers only slightly curved, chela with pedicel 3.6× (male 3.5×), chela without pedicel 3.4× (male 3.3×) longer than broad, fixed finger chelal with seven trichobothria, isb absent, trichobothrium ib basal to est, and is not distal to esb, and movable finger with four trichobothria ( Fig. 11 ). Fixed finger with 26 teeth and four larger teeth (male, with 20 teeth and four larger teeth), movable finger with 11 cusp-shaped teeth (male, with 10 cusp-shaped teeth), and the remaining teeth, basal and flattened ( Fig. 11 ). Nodus ramosus at the level of st in the movable finger, and distal of ist in the fixed finger; well-developed venom apparatus on both fingers of the chela.

Carapace lateral margin strongly granulated, with two pairs of horned eyes, with 21 short pin-shaped setae (male, with 23 short pin-shaped setae), four setae on anterior margin, and 12 setae on margin posterior ( Fig. 5 ). Cucullus furrow long, extending to about the level of the first pairs of eyes ( Fig. 5 ); median transverse furrow well defined, and posterior very conspicuous ( Fig. 5 ).

Region coxal, pedipalpal coxa sparsely granulated, approx. 36 setae, coxa I with 18 setae, Coxa II 22, coxa III 32, coxa IV approx. 38.

Opisthosoma, tergites granulated. All setae pin-shaped, being longer than the setae of the carapace; and pleural membrane strongly striated; Tergal chaetotaxy of the female holotype, tergites I–XII: 16: 16: 14: 14: 12: 16: 14: 12: 12: 12: 10: 2, female paratype, tergites I–XII: 16: 16: 16: 14: 14: 14: 14: 14: 12: 12: 10: 2, male paratype tergites I–XII: 18: 18: 18: 16: 16: 16: 14: 14: 12: 12: 10: 2. Sternites, scarcely granulated, Sternal chaetotaxy of holotype female, sternites II–XII: 8: (2)6(2): (2)16(2): 16: 16: 16: 16: 16: 14: 12: 2, female paratype, sternites II–XII: 8: (2)6(2): (2)16(2): 16: 16: 16: 14: 14: 14: 12: 2, male paratype, sternites II–XII: 6: (2)9(2): (2)16(2): 16: 16: 16: 16: 16: 14: 12: 2.

The genital region of the female holotype with four short setae on each side of the anterior operculum ( Fig. 12 ), the posterior operculum with six setae ( Fig. 12 ). Region genital of the male paratype with six setae on the anterior operculum, with lateral sacs thick and strongly pleated, and nine setae on the posterior operculum.

Legs: all legs light-yellow ( Figs. 1 – 2 ), femur 3.9× (male 3.6×), patella 2.3× (male 2.4×), tibia 2.7× (male 2.5×), Metatarsus 2.8× (male 2.5×), tarsus 3.0× (male 3.1×) ( Fig. 13 ). Leg IV: femur+patella 5.2× (male 5.0×), tibia 3.8× (male 4.2×), metatarsus 2.8× (male 2.7×), tarsus 3.8× (male 3.7×), all setae pin-shaped, tarsus without a seta tactile, subterminal setae acuminate, undivided arolium longer than simple claws.

Measurements (mm): Female holotype (Paratype in parentheses): body length 1.912 (2.125); carapace 0.581 / 0.473 (0.593 / 0.476); cucullus length 0.168(0.171).Chelicerae 0.221 / 0.126 (0.254 / 0.139);movable finger0.165 (0.178). Pedipalps trochanter: 0.221 / 0.154 (0.224 / 0.158); femur: 0.537 / 0.154; patella 0.354 / 0.159 (0.358 / 0.162); chela with pedicel 0.914 / 0.251 (0.937 / 0.254); chela without pedicel 0.866 / 0.251 (0.893 / 0.254), movable finger 0.457 (0.481). Leg I: trochanter 0.08/0.09 (0.09/0.13), femur 0.235 / 0.061 (0.238 / 0.064), patella 0.141 / 0.063 (0.144 / 0.069), tibia 0.192 / 0.072 (0.195 / 0.085); metatarsus 0.141 / 0.031 (0.144 / 0.034); tarsus 0.094 / 0.041 (0.097 / 0.045). Leg IV: trochanter 0.199 / 0.121 (0.197 / 0.124); femur+patella: 0.416 / 0.126 (0.419 / 0.129); tibia: 0.304 / 0.081 (0.307 / 0.084); metatarsus 0.171 / 0.061 (0.174/0.07); tarsus 0.151 / 0.041 (0.154 / 0.041).

Male paratypes: Body length 1.609. Carapace 0.451 / 0.460; cucullus length 0.153. Chelicerae 0.219 / 0.123; movable finger 0.153. Pedipalps: trochanter 0.220 / 0.149; femur 0.533 / 0.152; patella 0.350 / 0.153; chela with pedicel 0.893 / 0.247; chela without pedicel 0.863 / 0.247; movable finger 0.446. Leg I: trochanter 0.08/0.090; femur 0.225 / 0.062; patella 0.345 / 0.147; tibia 0.182 / 0.071; metatarsus 0.140 / 0.030; tarsus 0.086 / 0.051. Leg IV: trochanter 0.193 / 0.120; femur+patella 0.415 / 0.123; tibia 0.302 / 0.071; metatarsus 0.169 / 0.060; tarsus 0.149 / 0.040.

Etymology. The specific epithet ( gollumi ) derives its name from the mythical (fictional) character Gollum, from Middle Earth, in the fantasy literary book “The Lord of the Rings” written by J.R.R. Tolkien, who lived in the cave.

Distribution. Only known from the type locality ( Brazil: Pernambuco, Meu Rei cave).

Remarks. Currently, only 11 species of the genus Geogarypus Chamberlin, 1930 are known from South America ( Harvey 2013). Individuals of Geogarypus gollumi sp. nov. differ from the other species of the genus by the absence of trichobothrium isb, likewise, by the trichobothrium ib basal to est, and is not distal to esb. Fixed finger chelal with 26 teeth and four larger teeth (male, with 20 teeth and four larger teeth), movable finger with 11 cusp-shaped teeth (male, with 10 cusp-shaped teeth), and the remaining teeth, basal and flattened. However, when compared to other species with the trichobothria isb absent. Geogarypus gollumi sp. nov. differs from Geogarypus bucculentus Beier, 1955 by the fixed finger with four pit-like structures with raised rims between and below eb, esb and est. Lateral margins of tergites swollen and raised. Tarsus of most legs diplotarsate, but some legs possess fused or partially fused tarsus (see Harvey, 1987; Figs. 7 – 8 ), and by possessing large lateral flanges on the carapace. Also, it differs from Geogarypus connatus Harvey, 1986 by the pedipalps, carapace and to a lesser extent tergites with large pustules; teeth of chelal fingers closely spaced, slightly retrorse. 5–7 internal accessory teeth present. Serrula exterior of chelicera with 11–12 (male), 11–13 (female) blades; galea of male simple, occasionally with 1 or 2 minute distal spinules, and female with 6–7 distal branches, and tarsus of all legs monotarsate; occasionally a slight suture is evident, but the segment is never articulated.

Figures

FIGURES 1–4. Habitus: 1–2, Geogarypus gollumi sp. nov.; 1, female holotype, dorsal view; 2, male paratype, dorsal view. Habitus: 3–4, Progarypus smaugi sp. nov.; 3, female paratype, dorsal view; 4, male holotype, dorsal view.

FIGURES 5–14. Geogarypus gollumi sp. nov. female holotype, dorsal view, unless stated otherwise: 5, carapace, dorsal view. 6, left chelicera, dorsal view. 7, left galea, lateral view. 8, left rallum, lateral view. 9, male paratype, right pedipalp aspect. 10, female holotype, right pedipalp aspect. 11, right chela, lateral view (arrows indicating aspect of the teeth). 12, genital sternites, ventral view. 13–14, left leg I, lateral view, and left leg IV, lateral view.