Chrysometa citlaltepetl, Salgueiro-Sepúlveda & Álvarez-Padilla, 2018

Salgueiro-Sepúlveda, F. Javier & Álvarez-Padilla, Fernando, 2018, New species of the orb-weaving spider genus Chrysometa (Araneae, Tetragnathidae) from oak forests near of the Pico de Orizaba National Park (Veracruz, Mexico), Zootaxa 4450 (3), pp. 301-330 : 304-306

publication ID	https://doi.org/10.11646/zootaxa.4450.3.1
publication LSID	lsid:zoobank.org:pub:942E45D3-2BA4-418E-A531-165CA2D7C7BF
DOI	https://doi.org/10.5281/zenodo.5991654
persistent identifier	https://treatment.plazi.org/id/CE389E60-6F63-0673-FF30-FF682EB6C11D
treatment provided by	Plazi
scientific name	Chrysometa citlaltepetl
status	sp. nov.

Treatment

Chrysometa citlaltepetl View in CoL new species

Figures 1 View FIGURE 1 , 2 View FIGURE 2 , 19 View FIGURE 19

Type material. Holotype (CNAN-T1178). Female from Pico de Orizaba National Park , Atotonilco Calcahualco , Veracruz, Mexico. Plot I: 19° 8' 17.4" N, 97° 12' 16.2" W, 2,300 m. February 15–24, 2013. Allotype (CNAN- T1179). Male from Pico de Orizaba National Park , Atotonilco Calcahualco , Veracruz, Mexico. Plot II: 19° 8' 30.2" N, 97° 12' 21.5" W, 2,388 m. February 15–24, 2013. Paratypes. 52 females and 41 males. Types are deposited in the Colección Nacional de Arácnidos ( CNAN) at the Instituto de Biología ( IBUNAM) GoogleMaps .

Etymology. The species epithet is a noun in apposition that refers to the náhuatl name of the Pico de Orizaba volcano.

Diagnosis. Females of C. citlaltepetl can be distinguished from C. brevipes Levi, 1986 , C. puebla Levi, 1986 and all sympatric species by the following features: copulatory opening depression with a median sclerotized lip and transverse bar longer than in the other species ( Figs. 1D View FIGURE 1 , 2D View FIGURE 2 ). Chrysometa brevipes females have an anterior lip forming a rectangular depression and C. puebla females have the distal part of the transverse bar lobed-shaped. Males of C. citlaltepetl are distinguished from C. puebla and all sympatric species by the following features: thin paracymbium in L-shape with the paracymbium upper prong in ventral view large, rectangular and straight and the paracymbium lower prong with a rounded tip ( Figs. 1I View FIGURE 1 , 2A View FIGURE 2 ). Chrysometa puebla males have a thicker paracymbium upper prong and a pointed paracymbium lower prong.

Description. Female. Total length 5.1. Cephalothorax: length 2.1, width 1.8. Carapace pale-yellow, black patterns over the cephalic region narrowing in the middle and towards the fovea. Ocular area dark-brown below the median eyes and pale-yellow bellow the lateral eyes ( Fig. 1A, B, G View FIGURE 1 ). Eyes subequal in size ( Fig. 1G View FIGURE 1 ). AME diameter 0.12, PME 0.15, ALE and PLE 0.15. Chelicerae yellow, dark-brown on the anterior part and brighter on sides, black patterns on the posterior part, with few scattered setae ( Fig. 1B, C, G View FIGURE 1 ). Endites longer than wide, darkyellow, brighter on the tips, internal margins pale-yellow. Labium wider than long, dark brown, pale-yellow on the posterior part. Sternum dark-brown, wider between the first and second legs ( Fig. 1C View FIGURE 1 ). Abdomen: brown, dorsally covered with guanine silvery patches, lateral and anterior part darker with a Y-shape pattern from the middle to the spinnerets, with transversal dark-brown lines ( Fig. 1A, B View FIGURE 1 ); ventrally brown, with guanine patches concentrated in four spots forming a central dark-brown pattern between the spinnerets and the epigynum, one yellow spot on each side of spinnerets ( Fig. 1C View FIGURE 1 ). Leg lengths: I 11.3, II 8.4, III 4.5 and IV 6.3. Legs yellow darker on joints, with ventral and dorsal dark-brown spots. Tarsi dark-brown. All segments tips dark-brown. Epigynum: epigynal plate rectangular, wider than long; transverse bar with the anterior portion wider, septum well sclerotized with thick margins. Copulatory openings in sclerotized depressions with a middle lip ( Figs. 1D View FIGURE 1 , 2D View FIGURE 2 ). Spermathecae, copulatory ducts and fertilization ducts as shown in Figure 1E, F View FIGURE 1 .

Male. As in female except as noted. Total length 3.5. Cephalothorax: length 1.9, width 1.4. Carapace: dorsal coloration brighter. AME diameter 0.1, PME 0.14, ALE and PLE 0.11. Chelicerae brown, rugose, larger and narrower, setae bases enlarged and more abundant at cheliceral base; retrolateral cuticle less rugose towards the ventral and apical surfaces ( Fig. 1H View FIGURE 1 ). Abdomen: dorsal and lateral patterns weaker than in female. Ventrally darker, with larger guanine patches. Leg lengths: I 13.1, II 8.9, III 4 and IV 5.8. Pedipalp: CEBP triangular, curved anteriorly. CEMP rectangular and flattened, pointed retrolaterally ( Figs. 1I View FIGURE 1 , 2A, B, C View FIGURE 2 ). Thin paracymbium, Lshaped in ventral view ( Fig. 1I View FIGURE 1 ). UpP enlarged, wider than LwP on ventral view. LpP rounded ( Figs. 1I View FIGURE 1 , 2A View FIGURE 2 ). Embolus thin, with tubular shape and supported by the conductor; EBA shorter than embolus and curved in apical region ( Figs. 1I View FIGURE 1 , 2A, B, C View FIGURE 2 ). Conductor, embolus and EBA in ventral view as in Figures 2I View FIGURE 2 , 3A View FIGURE 3 .

Variation. Female total length 4.1–5.8, cephalothorax length 1.6–2.4, cephalothorax width 1.3–1.9. Male total length 3.5–4.1, cephalothorax length 19–2.1, cephalothorax width 1.4–1.6.

Material examined. N=95. Mexico: Veracruz, Atotonilco Calcahualco, six females, one male Plot I: 19° 8' 17.4" N, 97° 12' 16.2" W, 2,300 m., four females Plot II: 19° 8' 30.2" N, 97° 12' 21.5" W, 2,388 m., May 21–30, 2012; six females, one male Plot I: 19° 8' 17.4" N, 97° 12' 16.2" W, 2,300 m., seven females, one male Plot II: 19° 8' 30.2" N, 97° 12' 21.5" W, 2,388 m., October 4–14, 2012; 19 females GoogleMaps , 22 males Plot I: 19° 8' 17.4" N, 97° 12' 16.2" W, 2,300 m., ten females, 17 males Plot II: 19° 8' 30.2" N, 97° 12' 21.5" W, 2,388 m., February 15–24, 2013. Colección Nacional de Arácnidos ( CNAN) at the Instituto de Biología ( IBUNAM) GoogleMaps .

Distribution. Veracruz, Mexico. Known only from the type locality ( Fig. 19 View FIGURE 19 ).

Biology. Specimens were collected in a Quercus forest fragment with secondary plant growth. Specimens were found in both Plots during all three expeditions (expedition I: May 21–30, 2012; expedition II: October 4–14, 2012 and expedition III: February 15–24, 2013). Most specimens were captured by direct collecting at night followed by beating vegetation; only five specimens were found by cryptic searching.