Amphidraus draconicaudatus Salgado & Ruiz, 2017

Salgado, Alexandre & Ruiz, Gustavo R. S., 2019, Seven new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini), Zootaxa 4563 (3), pp. 451-481: 474-477

publication ID

publication LSID

persistent identifier

treatment provided by


scientific name

Amphidraus draconicaudatus Salgado & Ruiz, 2017


Amphidraus draconicaudatus Salgado & Ruiz, 2017 

Figs 26View FIGURE 26 A–D, 26G, 27A–E, 28A, 29A–B, 30

Amphidraus draconicaudatus Salgado & Ruiz, 2017: 427  , figs 22–24 (Holotype ♂ from Pium, 09°58'38.7"S, 50°02'05.0"W, Tocantins, Brazil, 11–26.V.2016, Serrão et al. leg., deposided in MPEG 32689; 1♂ and 2♀ paratypes, same data as holotype, deposited in IBSP 211843–211844, MPEG 32690); World Spider Catalog 2018.

Additional material examined. BRAZIL: Tocantins:GoogleMaps  Caseara   GoogleMaps, 9°18'15.6"S, 49°57'28.4"W: 2♂, 11.V.2016, A.B. Bonaldo et al. leg. ( MPEG 35018View Materials); Pium , 09°58'38.7"S, 50°02'05.0"W: 1♂, 19.V.2016, A.B. Bonaldo et al. leg. ( MPEG 35019View Materials)GoogleMaps  .

Revised diagnosis. A. draconicaudatus  is similar to A. shenlong  sp. nov. by having an elongate and stout projection on the retrolateral border of the embolic disc that extends towards the retrolateral tegulum border and bears several branches ( Figs 21DView FIGURE 21, 26A, 26CView FIGURE 26, 27AView FIGURE 27); also, by having the RvTA pointing ventrally, with projections on its border ( Figs 21FView FIGURE 21, 22BView FIGURE 22, 26GView FIGURE 26). However, the male of A. draconicaudatus  can be distinguished by having the RvTA with a single serrated projection, and a RTA reduced to spikes ( Figs 26GView FIGURE 26, 27View FIGURE 27 B–D), whereas in A. shenlong  sp. nov. the RvTA has four projections (three with acute tip and one with serrated tip), and the RTA serrated tip reaches the same height of the RvTA tip along palp axis ( Figs 21FView FIGURE 21, 22BView FIGURE 22, 26HView FIGURE 26). The female of A. shenlong  sp. nov. is unknown, but among the currently known females of Amphidraus  , A. draconicaudatus  sp. nov. is most similar to those of A. draconitupan  sp. nov., both with spermathecae kidney-shaped, with glands near copulatory openings and with a narrow dorsal pocket placed posteriorly on epigynal plate ( Figs 24DView FIGURE 24, 25DView FIGURE 25, 27EView FIGURE 27). However, the female of A. draconicaudatus  sp. nov. can be distinguished from that of A. draconitupan  sp. nov. by having longer copulatory ducts connected to the inner posterior border of spermathecae (see Salgado & Ruiz 2017: fig. 24F), whereas they connect to the outer border of the spermathecae in A. draconitupan  ( Fig. 25DView FIGURE 25).

Description. See Salgado & Ruiz (2017).

Variation. Among the males examined, we observed the following variation in palpal structures ( Figs 26View FIGURE 26 A–D, 26G): the superior border of the branched projection of embolic disc can be smooth ( Figs 26View FIGURE 26 A–B) or occupied by large serial spikes (similar to a comb) ( Figs 26View FIGURE 26 C–D). We decided to refrain from describing this variation as a new species and all these forms are considered conspecific. Also, the number and shape of branches on the RvTA is variable ( Fig. 26GView FIGURE 26; see Salgado & Ruiz 2017: figs 23B, 24B, 24D).

Note. Amphidraus draconicaudatus  , A. shenlong  sp. nov. and A. draconitupan  sp. nov. clearly compose a particular group within the genus. The males in this group have one stout projection that emerges from the retrolateral border of the embolic disc and extends towards to retrolateral border of tegulum ( Figs 22AView FIGURE 22, 25AView FIGURE 25, 26AView FIGURE 26, 27AView FIGURE 27). Moreover, males also have pockets on outer faces of chelicerae ( Figs 28View FIGURE 28 A–C, 29A–B), of unknown use.

Distribution. Known only from the state of Tocantins ( Brazil) ( Fig. 30View FIGURE 30).














Amphidraus draconicaudatus Salgado & Ruiz, 2017

Salgado, Alexandre & Ruiz, Gustavo R. S. 2019

Amphidraus draconicaudatus

Salgado, A. & Ruiz, G. R. 2017: 427