Chimena, Lin & Li, 2022

Lin, Yucheng & Li, Shuqiang, 2022, Chimena gen. nov., a new spider genus (Araneae, Mysmenidae) from China, with descriptions of two new species and a new combination, ZooKeys 1125, pp. 69-86 : 69

publication ID	https://dx.doi.org/10.3897/zookeys.1125.85741
publication LSID	lsid:zoobank.org:pub:BC000963-14DB-433C-B517-ED05918968CF
persistent identifier	https://treatment.plazi.org/id/7DC578FA-3E86-5796-8B3B-CDD4387AE989
treatment provided by	ZooKeys by Pensoft
scientific name	Chimena
status	gen. nov.

Treatment

Chimena gen. nov.

Type species.

Chimena qiong sp. nov.

Etymology.

The generic name is a combination of the first three letters of China and the latter half of Mysmena . The gender is feminine.

Diagnosis.

Chimena gen. nov. differs from other mysmenid genera by the presence of strong spines on the chelicerae of males (as in some Chinese species of Gaoligonga Miller, Griswold & Yin, 2009 and Mysmena Miller, Griswold & Yin, 2009; see fig. 38A in Miller et al. 2009, fig. 8C in Lin and Li 2014, and figs 5E, 6A, 7E in Lin and Li 2008); a very long embolus spiralling around the bulb at least 5 times; and the spermathecae near the posterior margin of the epigyne; the copulatory ducts are highly coiled and extend anteriorly. Chimena gen. nov. is morphologically similar to Chanea Miller, Griswold & Yin, 2009 in having an extremely coiled embolus (cf. Figs 3A View Figure 3 , 5A View Figure 5 ; figs 49A-B, 51A-B in Miller et al. 2009; figs 3A in Lin and Li 2016) and a membranous, translucent, wrinkled scape (Figs 4J View Figure 4 , 6J View Figure 6 , 7F View Figure 7 ; fig. 4D in Lin and Li 2016). Males can be distinguished by the presence of a cymbial process (CyP1, CyP2), which is absent in Chanea (Figs 3D View Figure 3 , 3F View Figure 3 , 5B View Figure 5 , 5G View Figure 5 vs. 49A, 49B in Miller et al. 2009 and figs 2C, 3C in Lin and Li 2016). Females differ by having the spiral rod-shaped spermathecae close to the posterior margin of the epigyne, versus globular spermathecae located anteriorly in Chanea , as well as the copulatory ducts not being entwined with the fertilization ducts [intertwined in Chanea (Figs 4I, J View Figure 4 , 6I, J View Figure 6 , 7E-F View Figure 7 vs. fig. 49C in Miller et al. 2009 and fig. 4C-D in Lin and Li 2016)].

Description.

Carapace pear-shaped, cephalic part distinctly raised in male; clypeus slightly concave. Ocular area black, AME black, others white; AER procurved, PER recurved or straight; ALE adjoined to AME and PLE, AMEs separated by at least its diameter; further separated in males than in females. Two or three pairs of strong spines on anterior surface of male chelicerae (Figs 4E View Figure 4 , 6E View Figure 6 ). Labium fused to sternum. Sternum triangular, slightly plump, posteriorly truncated, light colour anteriorly and centrally. Each leg segment proximally pale yellow, distally darkish grey. Male with a mesal clasping spine and a distal, small nodule prolaterally on metatarsus I (Fig. 3C View Figure 3 ), female with weakly sclerotized spot on femur I. Abdomen dorsally rounded, surrounded by stripe of white pigmentation laterally and posteriorly. Venter black between epigastric furrow and spinnerets (Figs 4B, D View Figure 4 , 6B, D View Figure 6 , 7B View Figure 7 ).

Male palp. Tibia swollen, proximally narrow and distally broad, larger number of long setae on dorsally than ventrally (Figs 3F-G View Figure 3 , 5G-H View Figure 5 ). Cymbium translucent, encloses ventral and prolateral sides of bulb (Figs 3G View Figure 3 , 5E, H View Figure 5 ). Paracymbium flat, wide, with a few long setae and a horn-shaped process (CyP2) distally (Figs 3D, F View Figure 3 , 5B, D View Figure 5 ). Distal part of cymbium extends to form an apical cymbial conductor (CyC), with horn-shaped or dentoid process (CyP1) attached to lateral margin of cymbial conductor (Figs 3E, F View Figure 3 , 5B-D, G-H View Figure 5 ). Tegulum flat, without any process or projection (Figs 3F View Figure 3 , 5D, F View Figure 5 ). Embolus slender, filiform, elongate, encircles the bulb multiple times, end extends to apex of cymbial conductor (Figs 3F View Figure 3 , 5E, G-H View Figure 5 ).

Epigyne and vulva. Genital area covered with sparse setae, sclerotized spermathecae faintly visible through tegument (Figs 4H View Figure 4 , 6H View Figure 6 , 7D View Figure 7 ). Scape wrinkled, membranous, finger-like, short. Spermathecae rod-shaped, spiral, near epigynal posteromargin, separated from one another by about their length. Most of copulatory ducts membranous, extending anteriorly, coiled, overlapped with anterior end of spermathecae. Fertilization ducts relatively long, wide, originating at distal part of spermathecae, middle and proximal parts entwined with spermathecae, distal part thins gradually, inflexed (Figs 4I-J View Figure 4 , 6I-J View Figure 6 , 7E-F View Figure 7 ).