Amphidraus sacrificatus

Salgado, Alexandre & Ruiz, Gustavo R. S., 2019, Seven new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini), Zootaxa 4563 (3), pp. 451-481: 457-459

publication ID

https://doi.org/10.11646/zootaxa.4563.3.3

publication LSID

lsid:zoobank.org:pub:86E75433-D91B-48E5-9807-9A0A460EFCB3

persistent identifier

http://treatment.plazi.org/id/03F987C0-8A74-017A-3AEE-8E9EFEC24BA9

treatment provided by

Plazi

scientific name

Amphidraus sacrificatus
status

sp. nov.

Amphidraus sacrificatus  sp. nov.

Figs 9–10View FIGURE 9View FIGURE 10, 14View FIGURE 14

Type material. Holotype:GoogleMaps  ♂ from Conceição do Araguaia   GoogleMaps, 07°59’23.5”S, 49°24’28.8”W, Pará, Brazil, 16.I.2018, R.P.S Almeida. & F.V. Arruda leg. ( MPEG 35027View Materials). Paratypes: 2♂, same data as holotype ( MPEG 34602View Materials, IBSP 221863View Materials)GoogleMaps  .

Etymology. The specific epithet an adjective and refers to the heart-shaped membrane linked to proximal process on embolic disc ( Fig. 10BView FIGURE 10), in allusion to human sacrificial rituals practiced by some ancient cultures.

Diagnosis. Differs from all Amphidraus  species in having a blade-shaped embolus shaft ( Figs 9FView FIGURE 9, 10View FIGURE 10 A–B) and a proximal process on embolic disc (pPED) linked to a heart-shaped membrane [ Figs 9View FIGURE 9 C–D, 9F (white arrow), 10A–B, 10D]. In addition, the cymbial conductor (cc) is “Y-shaped” and faces retrolaterally ( Figs 9EView FIGURE 9, 10CView FIGURE 10) (cc faces ventrally in all the other described species; see Figs 13AView FIGURE 13, 17AView FIGURE 17).

Description. Male holotype (MPEG 35027). Total length: 4.45. Carapace 2.13 long, 1.46 wide, 1.03 high. Ocular quadrangle 1.10 long. Anterior eye row 1.48 wide, posterior 1.19 wide. Legs 4312. Length of legs: I 3.79 (1.22 + 1.43 + 1.14); II 3.62 (1.19 + 1.28 + 1.15); III 4.46 (1.40 + 1.45 + 1.61); IV 4.75 (1.39 + 1.61 + 1.75). Palp ( Figs 9View FIGURE 9 C–F, 10A–E): femur and patella with no modifications; RvTA with two short branches, the more ventral branch is reduced and rounded, and the more dorsal branch is larger, with acute tip ( Figs 9DView FIGURE 9, 10DView FIGURE 10); RTA with wide base, shorter than the tibia and with acute tip ( Figs 9DView FIGURE 9, 10View FIGURE 10 D–E); cymbium oval ( Fig. 10EView FIGURE 10); tegulum with stout lobe curved to prolateral side ( Figs 9C, 9FView FIGURE 9, 10AView FIGURE 10); embolic disc with three processes very close together on its distal portion: two short and rounded distal process (dPED) and one short and triangular ventral process (vPED) ( Figs 9D, 9FView FIGURE 9, 10View FIGURE 10 A–B, 10D); embolic filament (ef) very short, approximately 1/5 the length of embolus shaft ( Figs 9FView FIGURE 9, 10View FIGURE 10 A–B). Color in alcohol ( Figs 9View FIGURE 9 A–B): cephalic area black with yellow setae near the eyes; thoracic area laterally black and centrally dark brown with yellow setae on median-posterior portion; abdomen dorsally variegated with black and dark brown, and with a longitudinal stripe of white setae; ventrally variegated with brown; legs I almost black and legs II–IV dark brown; tarsi pale in all legs.

Female. Unknown.

Note. The RvTA was interpreted herein as an apophysis with two branches ( Figs 9DView FIGURE 9, 10DView FIGURE 10). However, in other Amphidraus  species, such as A. araripe  sp. nov., these branches are not fused and therefore interpreted as two distinct apophyses: one RvTA and one ITA ( Figs 11FView FIGURE 11, 13BView FIGURE 13). The processes placed proximally on embolic disc and herein named as the pPED in A. sacrificatus  sp. nov. and A. boomerang  sp. nov. ( Figs 7CView FIGURE 7, 8AView FIGURE 8) are possibly homologous. However, in A. sacrificatus  sp. nov. it is linked to a heart-shaped membrane [ Figs 9C, 9FView FIGURE 9 (white arrow), 10A–B]. The homologies of all these structures across the genus need to be tested in future studies.

Distribution. Known only from the type locality (state of Pará, Brazil) ( Fig. 14View FIGURE 14).

Natural History. The specimens were collected from an ecotonal zone between the Cerrado and the Amazon rainforest.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Salticidae

Genus

Amphidraus