Medionops cesari (Dupérré) Duperre, 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 : 127-128

Medionops cesari (Dupérré) new combination

Figures 7–8

Nops cesari Dupérré, 2014: 464 , figs 1–5, 14, 17, 18.

Types. Male holotype and female paratype from Casa Cesar Tapia, Cotopaxi Province, Ecuador, 13.ix.2013, sifting litter, E. Tapia & N. Dupérré, deposited in QCAZ, not examined.

Material examined. Ecuador: Pichincha: 47 km. S of Santo Domingo, Rio Palenque , (0°44'S 79°48'W), 26– 30.v.1975, S. Peck, 1♂ ( AMNH) . Santo Domingo de los Tsáchilas: Las Damas (0°11'23"S 78°53'59"W), 1209 m asl., 12–23.vii.2014, N. Dupérré and E. Tapia, pitfall trap, 1♂ (left palp for SEM), 1♀ (genitalia for SEM) ( QCAZ) .

Diagnosis. Males and females resemble those of M. blades n. sp. and M. murici n. sp. in having the abdomen with a light whitish gray dorsal chevron pattern, but can be distinguished by having the proximal chevron mark thin and bigger than the others, without the longitudinal line directed to the pedicel ( Fig. 8 A). Males have a small bulb, the greatest width of bulb fits three times on the cymbium length ( Figs 7 A; 8D–E), embolus shorter than cymbium length, tip of embolus curved, stout ( Figs 7 D–E); and females with a deep median concavity (mc) on distal margin of receptaculum (dmr), without median septum or invagination ( Figs 7 G–I).

Description. Male and female described in detail by Dupérré (2014). Additionally: Male and female with short crista, gladius with the common shape among nopine. Female external genitalia with transversal and wide genital opening (go) and wide sclerotization around spiracles, genital opening and posterior plate ( Fig. 8 C). Internal genitalia with strongly concave distal margin of receptaculum; proximal section of uterus externus (ue) wide, almost the same length of receptaculum; internal fold projected ( Figs 7 G–I).

Distribution. Known from Pichincha, Santo Domingo de los Tsáchilas and Cotopaxi provinces in Ecuador ( Fig. 21 ).

Figures

FIGURE 7. Medionops cesari (Dupérré) new comb., A – F Male from QCAZ, G – I Female from QCAZ. A left palp, prolateral view. B tibial brush on left palp, prolateral view. C cymbium, dorsal oblique view. D tip of embolus, ventral oblique view. E tip of embolus, prolateral view. F detail of chemosensory setae on cymbium, dorsal oblique view. G internal genitalia, dorsal view. H internal genitalia, posterior view. I internal genitalia, anterior view. Abbreviations: ap—anterior plate, dmr—distal margin of receptaculum, if—internal fold, mc—median concavity, re—receptaculum, pp—posterior plate, t—tracheal trunk, ue—uterus externus.

FIGURE 8. Medionops cesari (Dupérré) new comb. A male from QCAZ, habitus, dorsal view. B female from QCAZ, habitus, dorsal view. C external genitalia of female from QCAZ, ventral view. D left palp of male from QCAZ, prolateral view. E left palp of male from QCAZ, 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.