Amazoonops, Ott, Ricardo, Ruiz, Gustavo R. S., Brescovit, Antonio D. & Bonaldo, Alexandre B., 2017

Ott, Ricardo, Ruiz, Gustavo R. S., Brescovit, Antonio D. & Bonaldo, Alexandre B., 2017, Amazoonops, a new genus of goblin spiders (Araneae: Oonopidae) from the Brazilian Amazon, Zootaxa 4236 (2), pp. 244-268: 245-247

publication ID

https://doi.org/10.11646/zootaxa.4236.2.2

publication LSID

lsid:zoobank.org:pub:95237DA5-852B-45D6-BEF0-29EB96CAAB34

DOI

http://doi.org/10.5281/zenodo.6049543

persistent identifier

http://treatment.plazi.org/id/092A87F7-FFC7-FE07-51DE-A56788FAFD35

treatment provided by

Plazi

scientific name

Amazoonops
status

gen. nov.

Amazoonops   gen. nov.

Type Species. Amazoonops caxiuana   sp. nov.

Etymology. The generic name is a contraction between Amazon and Oonops   and is masculine in gender.

Diagnosis. Amazoonops   gen. nov. is considered a member of the Varioonops   complex, since the species of the new genus share with those of Varioonops   , Ponsoonops   and Bipoonops   [sensu Bolzern & Platnick (2013) and Bolzern (2014)] the sexually dimorphic abdominal dorsal scuta, present in males and absent in females, as well as a well-defined cymbium, separated form the bulbus by a deep seam ( Figs 39 View FIGURES 38 – 43 , 46, 47 View FIGURES 44 – 49 ). Species of Amazoonops   differ from the members of the above cited genera by the presence of deep sternal pits in both males and females ( Figs 7–9 View FIGURES 7 – 12 , 13–16 View FIGURES 13 – 16 ). Males are further distinguished by the smooth (not patterned) abdomen ( Figs 19–21 View FIGURES 17 – 23 ) and the narrow cymbium and inflate, subquadrate bulbus, with simple embolus and no well-defined conductor ( Figs 38– 43 View FIGURES 38 – 43 ; 46–47). Females can be also distinguished from all other Oonopidae   by the incomplete epigastric scutum ring around pedicel ( Figs 55 View FIGURES 50 – 56 , 88 View FIGURES 84 – 91 , 127 View FIGURES 124 – 129 ).

Description. CEPHALOTHORAX: Carapace without any pattern, pars cephalica slightly elevated in lateral view, posterolateral edge without pits, posterior margin not bulging below posterior rim, anterolateral corners without extension or projections, posterolateral surface without spikes, sides granulate, thorax without depressions, fovea absent, without radiating rows of pits; lateral margin straight, rebordered, with blunt denticles; plumose setae near posterior margin of pars thoracica absent; non-marginal pars cephalica setae needle-like; non-marginal pars thoracica setae needle-like; marginal setae needle-like ( Figs 1–2 View FIGURES 1 – 6 , 35 View FIGURES 32 – 37 , 61 View FIGURES 57 – 67 ). Clypeus margin slightly rebordered, sinuous in frontal view, vertical in lateral view, median projection absent; setae present, needle-like. Chilum absent ( Figs 3–4 View FIGURES 1 – 6 ). Six eyes, well developed, all subequal, ALE circular, PME oval, PLE circular; posterior eye row recurved; ALE separated by less than their radius ( Figs 2–4 View FIGURES 1 – 6 ; 35–36). Sternum longer than wide, uniform, fused to carapace, median concavity absent, with radial furrows between coxae I–II, II–III, III–IV, radial furrow opposite coxae III absent, microsculpture covering entire surface, sickle-shaped structures absent, posterior margin not extending coxae IV posteriorly, anterior corner unmodified, distance between coxae approximately equal, extensions of pre-coxal triangles absent, lateral margins unmodified, without posterior hump; setae sparse, needlelike, originating from surface, without hair tufts ( Figs 7–9 View FIGURES 7 – 12 , 13–16 View FIGURES 13 – 16 , 17 View FIGURES 17 – 23 , 37 View FIGURES 32 – 37 ), anterior margin unmodified; parapedicelar organ present ( Figs 11–12 View FIGURES 7 – 12 ). Mouthparts: chelicerae, endites and labium orange-brown. Chelicerae slightly divergent, anterior face unmodified; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, setae needle-like, evenly scattered; tip, paturon posterior surface, promargin and inner margin unmodified. Labium not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization; subdistal portion with unmodified setae. Endites distally not excavated, serrula present in single row, posteromedian part unmodified, same as sternum in sclerotization ( Figs 2–3 View FIGURES 1 – 6 , 10 View FIGURES 7 – 12 , 18 View FIGURES 17 – 23 , 44 View FIGURES 44 – 49 , 78 View FIGURES 78 – 83 , 101 View FIGURES 101 – 106 , 118 View FIGURES 118 – 123 ). Palpal claws absent; spines absent; tarsus unmodified in females ( Figs 52 View FIGURES 50 – 56 , 86 View FIGURES 84 – 91 ). ABDOMEN: ovoid, without long posterior extension, rounded posteriorly, inter-scutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions without color pattern in males. Color pattern composed by few ( Fig. 54 View FIGURES 50 – 56 ) to many black dorsal spots in females ( Figs 89 View FIGURES 84 – 91 , 124 View FIGURES 124 – 129 ). Book lung covers large, ovoid, without setae, anterolateral edge unmodified, pedicel ribbed, scuto-pedicel region unmodified, scutum extending far dorsal of pedicel ( Figs 21–22 View FIGURES 17 – 23 ); plumose hairs, matted setae on anterior ventral abdomen in pedicel area and cuticular outgrowths near pedicel absent in males. Pedicel tube short in females ( Figs 56 View FIGURES 50 – 56 , 91 View FIGURES 84 – 91 , 129 View FIGURES 124 – 129 ). Dorsal scutum strongly sclerotized, without color pattern, not fused to epigastric scutum, anterior half without projecting denticles ( Figs 19, 21 View FIGURES 17 – 23 ); absent in females ( Figs 54– 55 View FIGURES 50 – 56 ). Epigastric scutum strongly sclerotized, completely surrounding pedicel, not protruding, small lateral sclerites absent ( Fig. 22 View FIGURES 17 – 23 ). In females epigastric scutum only partially surrounding pedicel ( Figs 55 View FIGURES 50 – 56 , 88 View FIGURES 84 – 91 , 127 View FIGURES 124 – 129 ), without lateral joints. Postepigastric scutum strongly sclerotized, fused to epigastric scutum, anterior margin unmodified in males ( Fig. 20 View FIGURES 17 – 23 ); in females postepigastric scutum pale orange, short, only around epigastric furrow ( Figs 54 View FIGURES 50 – 56 ; 56, 88, 91). Spinneret scutum absent. Supra-anal scutum absent. Dorsum setae present, needle-like. Epigastric area setae uniform, needle-like. Postepigastric area setae present, needle-like. Spinneret scutum without fringe of setae. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. Colulus represented only by setae ( Fig. 110 View FIGURES 107 – 117 ). LEGS: without color pattern in males, pale orange in females. Femur IV not thickened, same size as femora I–III, tibia I unmodified, tibia IV specialized hairs on ventral apex present, tibia IV ventral scopula absent, metatarsi III and IV weak ventral scopula absent; leg spines absent ( Figs 24–25 View FIGURES 24 – 27 ). Tarsal proclaws and retroclaws inner face smooth; tarsus I superior claws with four teeth on lateral surface of proclaw, one tooth on median surface of proclaw, four teeth on lateral surface of retroclaw, one tooth on median surface of retroclaw; tarsus IV superior claws with two teeth on lateral surface of proclaw, one tooth on median surface of proclaw, two teeth on lateral surface of retroclaw ( Figs 28–31 View FIGURES 28 – 31 ). Patella plus tibia I shorter than carapace and metatarsi I and II meso-apical comb absent. Trichobothria base longitudinally narrowed, hood smooth. Tarsal organ with 2 (leg IV) to 3 (leg I) visible sensilla ( Figs 26–27 View FIGURES 24 – 27 ). GENITALIA: male epigastric region with sperm pore small, oval, unmodified; furrow without omega-shaped insertions, without setae ( Fig. 20 View FIGURES 17 – 23 ). Palp normal size, not strongly sclerotized, right and left palps symmetrical, proximal segments pale orange; trochanter normal size, unmodified; femur normal size, two or more times as long as trochanter, without posteriorly rounded lateral dilation, attaching to patella basally; patella shorter than femur, not enlarged, without prolateral row of ridges, setae unmodified; cymbium pale orange, narrow in dorsal view, not fused with bulb, not extending beyond distal tip of bulb, plumose setae absent, without stout setae and distal patch of setae; bulb stout, spherical, with short subtriangular retrolateral projection near base of embolus. Embolus usually coiled, with prolateral and subdistal aperture ( Figs 38–43 View FIGURES 38 – 43 ; 46– 49). Female with large posterior receptaculum; anterior receptaculum almost squared; two short posteriorly directed apodemas; short and sinuous transversal sclerite ( Figs 130–132 View FIGURES 130 – 132 ).

Species Included. Amazoonops almeirim   sp. nov., A. cachimbo   sp. nov., A. caxiuana   sp. nov., A. ducke   sp. nov. and A. juruti   sp. nov.

Distribution. Known from states of Amazonas and Pará, Brazil.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Oonopidae