Medionops murici, Sánchez-Ruiz, Alexander & Brescovit, Antonio D., 2017

Sánchez-Ruiz, Alexander & Brescovit, Antonio D., 2017, A new genus with seven species of the Subfamily Nopinae (Araneae, Caponiidae) from the Neotropical region, Zootaxa 4291 (1), pp. 117-143 : 131-133

Medionops murici new species

Figures 11–14

Types. Male holotype from Estacão Ecológica de Murici (9°19'S 35°55'W), Murici , Alagoas, Brazil, 13– 22.ix.2003, Equipe BIOTA, winkler, deposited in IBSP 99011 . Paratypes: 1♂, 1♀, same data as holotype, pitfall trap, deposited in IBSP 99015 and IBSP 99014 respectively .

Additional material examined. BRAZIL: Paraíba: Areia, Reserva da Mata de Pau Ferro (6°57'S 35°45'W), 23–29.ix.1999, A.D. Brescovit, 1♂, 1imm. ( IBSP 99030 ), 1♂ ( IBSP 99028 ) . Pernambuco: Ipojuca, Mata de Oiteiro (8°23'S 35°3'W), 16.xi.2008, A. Costa, 1♂ ( IBSP 133582 ) . Alagoas: Murici , Estacão Ecológica de Murici (9°19'S 35°55'W), 13–22.ix.2003, Equipe BIOTA, pitfall trap, 1♀ ( IBSP 99020 ), 1♀ (genitalia, palp and legs for SEM) ( IBSP 99021 ), 1♂ ( IBSP 99010 ), 1♂ ( IBSP 99012 ), 1♂ ( IBSP 99016 ), 1♂ ( IBSP 99018 ), 1♂ ( IBSP 99013 ) . Maceió, Boa Vista , 17.xii.2005, G. Quintela, pitfall trap, 1♂ (palp and spinnerets for SEM) ( IBSP 85199 ) .

Etymology. The specific name is a noun in apposition, derived from the type locality.

Diagnosis. Males and females resemble those of M. blades n. sp. and M. cesari (Dupérré) n. comb. in having the abdomen with light whitish gray dorsal chevron pattern, but can be distinguished by having the proximal chevron mark thick and bigger than the others, with a longitudinal whitish gray line reaching the pedicel ( Figs 14 A–B). Crista and gladius absents ( Figs 11 C–D; 13B–C). Males with shorter embolus, without blade–shaped projections ( Figs 14 D, E); females with straight genital opening ( Fig. 14 C).

Description. Male (holotype): Total length 4.8. Carapace 2.2 long, 2.0 wide. Sternum 2.0 long, 1.9 wide. Leg measurements: I: 2.5; II: 2.4; III: 2.2; IV: 2.9. Carapace dark orange. Chelicerae, palps and legs orange; coxae and trochanters lighter. Endites, labium and sternum light orange. Abdomen dark gray with a pattern formed by five chevron light grey marks, the proximal chevron mark thick and bigger than the others, with a longitudinal whitish gray line reaching the pedicel ( Fig. 14 A). Anal tubercle and spinnerets lighter than abdomen. Crista and gladius absent ( Figs 11 C–D). Palp with a spherical oval, large bulb, the widest width of bulb is more than half of the cymbium length ( Figs 14 D–E); embolus longer than cymbium ( Figs 14 D–E), tip of embolus slightly curved, acuminate, with beveled opening ( Figs 12 C–F).

Female (paratype): Total length 5.0. Carapace 2.5 long, 2.3 wide. Sternum 2.0 long, 1.9 wide. Leg measurements: I: 2.6; II: 2.5; III: 2.3; IV: 3.0. Carapace, chelicerae, labium, legs, coxae, endites and sternum as in the male. Abdomen pattern as in the male ( Fig. 14 B). Anal tubercle and spinnerets lighter than abdomen. Crista and gladius absents ( Figs 13 B–C). External genitalia with a straight and narrow genital opening and wide sclerotization around spiracles ( Fig. 14 C). Internal genitalia with a slightly convex distal margin of receptaculum (dmr), without median concavity; uterus externus (ue) with wide proximal section; posterior plate strongly projected with a median invagination ( Figs 13 G–I); internal fold strongly sclerotized ( Fig. 13 J).

Distribution. Known only from the Brazilian States of Pernambuco, Alagoas and Paraíba ( Fig. 21 ).

Figures

FIGURE 11. Medionops murici n. sp., male (IBSP 85199). A tarsus on left leg I, retrolateral view. B tarsal claws on left leg I, retrolateral view. C join of tarsus and metatarsus on left leg I, ventral view. D detail of join of tarsus and metatarsus on left leg I, ventral view. E left leg II, retrolateral view. F join of tarsus and metatarsus on left leg II, ventral oblique view. G tarsal claws on left leg II, retrolateral view. H tarsal organ on left leg II, dorsal view. I tarsal organ on left leg IV, dorsal view. J tarsal claws on left leg IV, retrolateral view. K tarsal claws on left leg IV, dorsal view. L detail of tarsal claws on left leg IV, dorsal view.

FIGURE 12. Medionops murici n. sp., male (IBSP 85199). A – F left palp, G – I spinnerets. A prolateral view. B tibial brush, prolateral view. C tip of embolus, prolateral view. D tip of embolus, ventral view. E tip of embolus, retrolateral view. F tip of embolus, dorsal view. G posterior view. H left ALS, posterior view. I PMS, posterior view. Abbreviations: ALS—anterior lateral spinnerets, PMS—posterior median spinnerets.

FIGURE 13. Medionops murici n. sp., female (IBSP 99021). A left palp, retrolateral view. B join of left tarsus and metatarsus I, ventral view. C join of left tarsus and metatarsus II, ventral view. D left tarsus I, retrolateral view. E left tarsus II, showing locations of figures F – I, retrolateral view. F detail of setae, retrolateral view. G bases of setae, retrolateral view. H detail of frictional setae, retrolateral view. I detail of setae, retrolateral view. J female internal genitalia, dorsal view. K same, posterior view. L same, anterior view. Abbreviations: ap—anterior plate, dmr—distal margin of receptaculum, if—internal fold, rereceptaculum, pp—posterior plate, ue—uterus externus.

FIGURE 14. Medionops murici n. sp., A male holotype, habitus, dorsal view. B female paratype, habitus, dorsal view. C external genitalia of female paratype, ventral view. D left palp of male paratype, prolateral view. E left palp of male paratype, retrolateral view. Abbreviations: ap—anterior plate, ess—external sclerotization around spiracles, go—genital opening.

FIGURE 21. Map of South America showing distribution of Medionops species. Triangle, Medionops blades n. sp.; plus sign, Medionops cesari (Dupérré) n. comb.; square, Medionops claudiae n. sp.; tears, Medionops murici n. sp.; diamond, Medionops ramirezi n. sp.; circles, Medionops simla (Chickering) n. comb.; heart, Medionops tabay n. sp.