Bioacoustics of Antillena miguelangeli

Description. Male holotype . Carapace, legs and pedipalps brown dorsally, chelicerae and eye tubercle chestnut brown. Abundant pinkish setae covering carapace, chelicerae, and legs articles except on metatarsi and tarsi where pinkish setae are of distinctly lower density. Patellae, tibiae, and metatarsi distally with patches of white setae differently distributed. Abdomen dark gray with pink setae and having a light pattern, consisting in a single anteriorly located irregular patch and four indistinct lateral stripes from central to distal part of abdomen ( Fig. 7A ). Urticating setae forming a patch on the posterior half. All femora dorsally with two longitudinal stripes of abundant tiny pubescence, and without body setae; retrolaterally with one of such longitudinal stripes (most noticeable on posterior legs). All patellae dorsally with two of such stripes, slightly diagonal and meeting distally; tibiae I−IV dorsally with two longitudinal stripes. Ventrally, the labium, sternum, maxillae, coxae, and legs light brown ( Fig. 1A ); abdomen gray. Total length 22.7. Carapace 8.6 long, 7.3 wide. Ocular tubercle flattened, 1.25 long, 1.95 wide, clypeus absent; OQ 0.85 long, 1.95 wide ( Fig. 1B ). Anterior eye row procurved, posterior eye row slightly recurved. AME round, diameter 0.36; PME round, diameter 0.20; ALE ovoid, greater diameter 0.40; PLE ovoid, greater diameter 0.43. Eye interdistances:AME−AME 0.31, AME−ALE 0.30, AME−PME 0.10, AME−PLE 0.30; PME−PME 1.08, PME−PLE 0.03, ALE−PLE 0.20, ALE−ALE 1.30; PLE−PLE 1.44. Fovea transverse, 1.3 wide; 5.15 from the anterior edge of carapace. Chelicerae 4.3 long, with 1 row of teeth on the promargin ( Fig. 1C ). Left chelicera with 9 teeth and right with 8 teeth; each chelicera with 5 microspikes (granulation) between basal teeth 1−3. Sternum 4.3 long, 3.2 wide; covered by large, thin erect setae and with abundant pinkish setae ( Fig. 1A ). Labium dome-shaped, with anterior region almost straight, bearing long, thin, and erect setae ( Fig. 1A ); 0.92 long, 1.32 wide; 60 labial cuspules on the anterior third. Maxilla 2.95 long, 1.50 wide. Right maxilla with 148 cuspules forming a triangle on its basal anterior part; left maxilla with 157 cuspules, with same distribution. Three pairs of sigilla located near coxae I (rounded, 0.19 long, 0.14 from edge), coxae II (rounded, 0.22 long, 0.11 from edge), and coxae III (ellipsoidal, 0.40 long, 0.27 from edge). Abdomen 9.5 long, 6.7 wide; with type II urticating setae 0.53–0.57 in length. Spinnerets: PLS triarticulated, 3.73 long, basal segment 1.39, middle segment 0.90, apical segment 1.44, digitiform; PMS monoarticulated, 0.40 long. Scopulae: all tarsi 100 % scopulate; metatarsi I−II 95 %, III ≈ 60 %, IV ≈ 40 % scopulate. Tarsi I−III with scopula entire, tarsi IV less dense and with a band of elongated setae (not dividing the scopula); metatarsi IV divided by a band of elongated setae. Scopulae on tarsi and metatarsi I−II laterally extended, distinctly less developed in posterior tarsi and metatarsi. Claw tufts paired, well-developed. Dorsally, all tarsi with two rows of short claviform trichobothria distributed irregularly on apical half. Cymbium with two rows of such trichobothria on basal half. All paired tarsal claws without teeth. Plumose setae on retrolateral face of femur IV absent. Spination absent on all leg segments and palps. Cymbium with almost equal cymbial lobes and small conical process with a dorsal patch of short spines on its distal part ( Fig. 2 D−E). Embolus moderately long and slender ( Figs. 2 D−E; 3A, 3C, 3E, 3G), smoothly curved, projected retrolaterally but with a small ventrally projected bend at its distal third, carrying three smooth keels (PS, PI and A), not well-developed ( Figs. 3A, 3C, 3E, 3G ). Tegulum oval, smooth, without any tegular structures. Palpal tibia without any process. Tibia I with single subapical tibial apophysis, apically covered with numerous thin and large spines ( Fig. 2 A−C). Metatarsus I contact the retrolateral side of tibial apophysis when flexed. Maxillary and trochanteral stridulatory bristles absent. Coxae I−IV prolaterally with many soft spiniform setae, also present above the suture; retrolaterally present on coxae I and III, reduced in number and only present distally. Appendages segment lengths. Leg I: femur 7.8, patella 4.4, tibia 5.8, metatarsus 5.4, tarsus 2.9; total 26.3. Leg II: 7.1, 4.2, 5.7, 5.6, 2.7; 25.3. Leg III: 6.4, 3.5, 5.2, 4.9, 2.6; 22.6. Leg IV: 7.9, 3.9, 6.5, 6.1, 2.7; 27.1. Pedipalp: 4.6, 2.8, 3.5, -, 1.9; 12.8. Leg formula: I=IV>II>III. Leg IV/I= 1.03. Description. Female paratype . Carapace brown, legs and pedipalps brown dorsally, chelicerae and eye tubercle chestnut brown. Abundant pinkish setae distributed as in the male. Patellae, tibiae, and metatarsi patches of white setae as in male. Abdomen mostly black with pink setae and having a light pattern consisting in three distinct lateral stripes: the anterior and middle stripes each connect to one triangle in the mid-dorsal; posterior stripe is interrupted by the patch of urticating setae. The anterior triangle connects with a semi-circular patch on the base of the abdomen. Ventrally, the labium, sternum, maxillae, coxae, and legs light brown; abdomen gray. Scopulae without remarkable differences between anterior and posterior metatarsi and tarsi. Total length 25.5. Carapace 10.4 long, 8.2 wide. Ocular tubercle flattened, 1.52 long, 2.05 wide, clypeus absent; OQ 1.06 long, 2.05 wide ( Fig. 4B ). Anterior eye row procurved, posterior eye row slightly recurved. AME round, 0.30; PME round, 0.22; ALE ovoid, 0.49; PLE ovoid, 0.40. Eye interdistances: AME−AME 0.63, AME−ALE 0.36, AME−PME 0.22, AME−PLE 0.49; PME−PME 1.30, PME−PLE 0.04, ALE−PLE 0.22, ALE−ALE 1.53; PLE−PLE 1.75. Fovea transverse, 1.8 wide; 6.5 from the anterior edge of carapace. Chelicerae 4.9 long, with a single row of teeth on the promargin ( Fig. 4C ). Left chelicera with 11 teeth and 6 microspikes between basal teeth 1−2; right chelicera with 10 teeth and 4 microspikes between basal teeth 1–3. Sternum 5.2 long, 3.8 wide ( Fig. 4A ). Labium 1.21 long, 1.71 wide; 81 labial cuspules on the anterior third. Maxilla 3.43 long, 1.91 wide. Right maxilla with ca. 165 cuspules, left maxilla with 147 cuspules. Three pairs of sigilla, anterior rounded 0.18 long, 0.09 from the edge; middle rounded 0.19 long, 0.08 from the edge; posterior ellipsoidal 0.35 long, 0.13 from the edge. Abdomen 10.2 long, 6.7 wide with type II urticating setae 0.52–0.56 in length. Spinnerets ( Fig. 5A ): PLS triarticulated, 4.60 long, basal segment 1.50, middle segment 1.10, apical segment 1.50, digitiform; PMS monoarticulated, 0.90 long. Spermathecae paired, short and broad, plateau-shaped with distal half strongly sclerotized and of elliptical form ( Fig. 5B ). Appendages segment lengths. Leg I: femur 7.2, patella 4.1, tibia 4.9, metatarsus 4.8, tarsus 2.9, total 23.9. Leg II: 6.8, 4.2, 5.0, 4.5, 2.7, 23.2. Leg III: 5.9, 3.7, 4.4, 4.2, 2.7, 20.9. Leg IV: 7.1, 4.2, 5.9, 5.3, 2.5, 25.0. Pedipalp: 5.5, 3.2, 3.0, -, 3.1, 14.8. Leg formula: I=IV>II> III . Leg IV /I = 1.05.