Bustamante, Abel A. & Ruiz, Gustavo R. S., 2017, Systematics of Thiodinini (Araneae: Salticidae: Salticinae), with description of a new genus and twelve new species, Zootaxa 4362 (3), pp. 301-347: 324-326

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gen. nov.

Tartamura  gen. nov.

Type species: Tartamura agatelin  sp. nov.

Etymology. The name is based on tartaros, where, in the Greek mythology, titans were inprisoned (also where wicked people were tormented and punished), and the end of Arachnomura  . Feminine in gender.

Diagnosis. Tartamura  gen. nov. resembles Arachnomura  , Atomosphyrus  , Cyllodania  , Hyetussa  and Thiodina  in having spine-like setae on the anterior face of male chelicera (absent in Ta. agatelin  sp. nov.). The genus differs from Atomosphyrus  and Cyllodania  in lacking projections on the face of male chelicera; from Arachnomura  , Hyetussa  and Thiodina  in having the spine-like setae distributed only distally on the male chelicera ( Figs 8G ‒8HView FIGURE 8). The male palp has a long embolus, and in some species it extends to the dorsum of the cymbium. It is the only thiodinine genus with dark metatarsus I and lighter tibia and tarsus.

Note. Despite the morphological differences (see diagnosis), this group is similar to Arachnomura  . In fact, Galiano (1977a) originally described Ta. adfectuosa  comb. nov. in Arachnomura  , due to overall morphological similarities beween this species and the type species of that genus, Ar. hieroglyphica  (see figs 17‒18 in Galiano 1977a). However, a molecular study (Ruiz & Maddison 2015) placed Ar. querandi  (“ A. cf. hieroglyphica  ” in that paper), a species closely related to the type species of Arachnomura  , closer to species herein described as Thiodina  ( Th. perian  sp. nov., treated as “cf. Cyllodania  ” in that paper), while the two species herein described as Tartamura  (“cf. Arachnomura  ” in that paper) showed up as closer relatives of a lineage that probably includes Cyllodania  (“cf. Atomosphyrus  ” in that paper) (Ruiz & Maddison 2015: fig. 37). Therefore, we decided to propose the new genus.

Description. Small jumping spiders (males 2.91‒3.15, females 2.85‒3.07 long) with flattened bodies and dark brown carapaces, usually with white scales ( Figs 18View FIGURE 18, 20View FIGURE 20, 22View FIGURE 22); male paturon with a median excavation and usually with spine-like setae placed distally ( Figs 8G ‒8HView FIGURE 8); with two, three or four promarginal teeth and one or two retromarginal teeth in males; one or four promarginal teeth and one, three or four retromarginal teeth in females; male endites not projected; labium rounded and sternum triangular with an anterior keel next to coxa I ( Figs 18C, 18FView FIGURE 18, 20C, 20FView FIGURE 20, 22C, 22FView FIGURE 22); male palpal tibia wider than long with a subtriangular RTA and variable RvTA (fingerlike, squared or rounded) ( Figs 19A ‒19CView FIGURE 19, 21A ‒21CView FIGURE 21, 23A ‒23CView FIGURE 23); cymbium oval ( Fig. 23AView FIGURE 23). Leg formula 1423 or 1432 in males and 4132 or 1432 in females. General spination (variations in parentheses): male: femur I d1-1-1, p0 (p1di), r0; II d1-1-1 (d0-1-1), p0 (p1di), r0; III d1-1-1 (d0-1-1), p0 (p1di), r0 (r1di); IV d1-1-1, p0 (p1di), r0 (r1di); patella I ‒IV 0; tibia I p0, r0, v2 *-0-2a-2a (v2 *-0-2a-0; v2 -0-2a-2a); II p0, r0, v1 r-1r-1p (v1 r-1r-0; v1 r-2a-2a; v1 r- 2a*-1r); III p0-1-1 (p0), r0-1-0 (r0), v2 di (v0); IV p0 (p1di; p0-1-1), r0 (r0-1-0), v2 di (v0; v2 adi); metatarsus I v2- 2; II v2-2 (v1 r-2); III p2di, r2di (r1di), v1 pdi (v1 p-1r-0); IV p2di, r2di (r1di), v2 di (v0; v1 p-2di; v1 rdi). Female: femur I d1-1-1, p0, r0; II=III d1-1-1 (d0-1-1), p0, r0; IV d1-1-1, p0, r0; patella I ‒IV 0; tibia I p0, r0, v2-2 a-2a (v2 a- 2a-2a); II p0, r0, v1 r-1r-0 (v1 r-2a-1r; v1 r-1r-1r); III p0, r0 (r0-1-0), v0 (v1 pdi); IV p0, r0 (r0-1-0), v0 (v2 adi; v1 pdi); metatarsus I v2-2; II v2-2 (v1 r-2); III p2di, r2di (r1di), v0; IV p2di, r1di (r2di), v0. Abdomen usually longer than carapace with a transverse band of white scales anteriorly placed and chevrons of white scales dorsally ( Figs 18A, 18DView FIGURE 18, 20A, 20DView FIGURE 20, 22A, 22DView FIGURE 22). Epigyne with a pair of copulatory openings placed medially or posteriorly; posterior edge uni- ( Figs 21D ‒21EView FIGURE 21) or bilobed ( Figs 19D ‒19EView FIGURE 19, 23D ‒23EView FIGURE 23).

Distribution. Amazon forest ( Brazil, Ecuador).

List of species (chronological order):

1. Tartamura adfectuosa (Galiano, 1977)  comb. nov. 2. Tartamura agatelin  sp. nov. (type species). 3. Tartamura huao  sp. nov.

4. Tartamura metzneri  sp. nov.