Description

Description. Female (CNAN-T 01383): Total length 11.9 mm. Carapace and opisthosoma color brown, pedipalps and legs brown with red tonalities. Dimensions of prosoma, opisthosoma, pedipalps segments, and all leg femora are provided in Table 2. Carapace. The frontal margin is almost straight, with one slightly pronounced lobe at each side, lobes are not joined in the middle area. Carapace presents a group of granules widely spaced; anterior, lateral, and posterior margins with a white border, posterior margin concave. Lateral and anteromedial eyes clearly visible, ocular tubercle black (Fig. 4 A). Sternum. Tri-segmented; all segments clearly sclerotized, the area around segments is a little less sclerotized. Tritosternum projected anteriorly, elongated, conical, with six setae on the basal region, four on the medial region, three on the distal region, and two more on the apex. Second segment (tetrasternum) oval with two setae on the medial region. Third segment (pentasternum) oval, slightly smaller than the second segment, with two setae on the medial region. Metasternum longitudinally divided, with two setae on the posterior margin of each half (Fig. 4 B). Abdomen. Oblong, color dark brown. Presents patches of light coloration on both sides of each tergite. The carapace is wider than the abdomen (Fig. 4 C). Chelicera. The mesal row of the basal segment of chelicerae with three teeth, the first is bilobed, placed in the proximal portion, lobe 1 b bigger than 1 a, followed by one tooth shorter in the medial portion, and the third, bigger than the others, placed in the distal region (Fig. 4 D). The ectal row with one conspicuous tooth (tooth 2) with an acuminated apex, placed in the medial region. There is a small keel on the most proximal region (tooth 1) (Fig. 4 F). The mobile segment of chelicerae with four teeth, the first is the biggest, the second and third are similar in size, and the fourth is the smallest. Pedipalp. Trochanter: Prolateral face with four spines; spines Tr 1 and Tr 3 placed in the medial region, Tr 2 placed near the ventral margin. Tr 3 and Tr 4 subequal in length. Spine lengths: Tr 2> Tr 1> Tr 4 ŻTr 3. Dorsal oblique series of five setiferous tubercles. Dorsomedial area without spines but with one big tubercle (Fig. 4 E). Femur: Ventral face with six major spines, Fv 4, Fv 3 a, Fv 4 a, and Fv 5 a are small, and between Fv 5 and Fv 5 a there are three tubercles, Fv 8 small. Spine lengths: Fv 1 = Fv 2> Fv 5> Fv 6> Fv 3> Fv 7> Fv 4> Fv 5 a> Fv 3 a = Fv 4 a = Fv 8 (Fig. 5 A). Dorsal face with five major spines, Fd 4 small with one tubercle on each side, there is a small spine Fd 5 a, one tubercle between Fd 5 – Fd 5 a and Fd 6 – Fd 7, with a small spine Fd 8, Fd 1 and Fd 2 share the same base, Fd 3 is separated from Fd 2. Spine lengths: Fd 2> Fd 3> Fd 5> Fd 6> Fd 1> Fd 7> Fd 4 = Fd 5 a> Fd 8 (Fig. 5 B). Patella: Ventral face with five major spines. With a conspicuous spine Pv 1 - a and one very small spine at each side, one conspicuous spine Pv 1 a, one very small spine between Pv 1 – Pv 1 a, there is a small spine between Pv 2 – Pv 3, Pv 3 – Pv 4, Pv 4 – Pv 5, and Pv 5 – Pv 6. Spine lengths: Pv 2> Pv 5> Pv 1> Pv 4> Pv 6> Pv 7> Pv 1 - a = Pv 1 a> Pv 3 (Fig. 5 C). Dorsal face with seven major spines, with one small spine Pd 1 a and Pd 1 - a, Pd 8 is absent. Spine lengths: Pd 5> Pd 3> Pd 2> Pd 4> Pd 6> Pd 1> Pd 7> Pd 1 - a = Pd 1 a (Fig. 5 D). Tibia: Ventral face with three major spines, there is one tubercle between Tv 1 – Tv 2, and one small spine between Tv 2 – Tv 3. Spine lengths: Tv 2> Tv 1> Tv 3 (Fig. 5 E). Dorsal face with two major spines, between Td 2 – Td 3 there is one tubercle, over Td 3 there is one conspicuous spine, distal to Td 3 there are two small spines, the most distal spine is a little bigger and here is named Td 4, Td 1 has less than a third of length of Td 3, and is placed almost on the base of Td 2. Spine lengths: Td 2> Td 3> Td 1 = Td 4 (Fig. 5 F). Tarsus-metatarsus: Internal face with two lines of dorsomedial bristles; suture between the tarsus and metatarsus is not visible. Tarsus without an inconspicuous spine on the proximal end of the dorsomedial surface. Legs. Femora brown. Femora lengths: I> III> II> IV (Table 2). Leg I: Tibia with 30 segments and tarsus with 58 segments in the right leg; the left leg is missing. Leg IV: Basitibia with three segments. Basitibia-distitibia lengths: BT 1> DT> BT 3> BT 2. Basitarsus and Telotarsus subequal in size. Tarsus tetramerous. Female genitalia. Genital operculum pentagonal, it extends to the second segment of the opisthosoma. Gonopod bases cylindrical, dorsal surface poorly sclerotized; on the most proximal area, there is a strongly sclerotized line, joining both bases, the coloration is brown on the most proximal region and white overall dorsal surface. The sclerites of gonopods claw-like, the base is more than three times wider than the medial and apical regions, apex curved. Sclerite coloration brown (Fig. 17 B, Table 6). Variation. Type series measurements and the number of segments in the basitibia IV, Tibia I and tarsus I, are summarized in Table 2. Sternum: The number and position of setae from all segments of the sternum are variable. Pedipalp: Trochanter: line of dorsal tubercles varies between four and six tubercles. Femur: Ventral face: tubercles are constant in most individuals however the size is variable, as well as the size of spines Fv 4, Fv 3 a, Fv 4 a, and Fv 5 a, which are always smaller than other spines but the relative sizes between them are variable. Dorsal face: the size and presence of tubercles mentioned in the holotype are variable. Patella: Ventral face: Tubercles and small spines were more conspicuous in larger sized individuals. Dorsal face: tubercles can be more conspicuous, in some individuals can be present tubercles between each spine, in larger specimens can be present a small spine Pd 8. Tibia: Ventral face: between Tv 2 – Tv 3 can be present two or three small spines. Dorsal face: tubercles between spines can be more conspicuous. Legs. The number of segments of the tibia and tarsus of leg I, was variable among the individuals, the number of tibial segments fixed at 30 and the tarsal segments between 58 and 64. In the observed specimens, the number of segments did not depend on sex, there are more tarsal segments in larger specimens (Table 2). Male. Observed males are similar in size to females (Table 2) spination pattern as in females, genital operculum has the posterior margin oval and covers part of the third segment of the opisthosoma. Male genitalia. (CNAN-T 01445): LaM longer than Pi. LoL 1 a little longer than LoL 2, both densely covered with minute projections, in LoL 1, projections are tubular, thin, and elongated, placed close together, the insertion base is not visible; projections in LoL 2 are similar to LoL 1, but with a slightly broader base, the insertion base is partially visible. In dorsal view, the LoD elongated but shorter than LoL 1 (Fig. 6, Table 6).

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Arthropoda

Class: Arachnida

Order: Amblypygi

Family: Phrynidae

Genus: Phrynus

Species: Phrynus alfonsoi Chirivi-Joya, 2021