Aetana mokwam Huber

Huber, Bernhard A. & Carvalho, Leonardo S., 2019, Filling the gaps: descriptions of unnamed species included in the latest molecular phylogeny of Pholcidae (Araneae), Zootaxa 4546 (1), pp. 1-96: 74-78

publication ID

https://doi.org/10.11646/zootaxa.4546.1.1

publication LSID

lsid:zoobank.org:pub:D2C9F49A-9B76-40AE-9A60-CAE9B99BA547

persistent identifier

http://treatment.plazi.org/id/E21587DB-FFD1-FF99-FF11-FB394E98FEE0

treatment provided by

Plazi

scientific name

Aetana mokwam Huber
status

sp. n.

Aetana mokwam Huber  sp. n.

Figs 267–269View FIGURES 264–271, 281–285View FIGURES 281–282View FIGURES 283–287, 289View FIGURES 288–293, 294–296View FIGURES 294–299

Type material. INDONESIA: ♂ holotype, ZFMK (Ar 20652), West Papua, Arfak Mountains, forest above Mokwam (1.112°S, 133.911°E), 1600 m a.s.l., 5–6.xi.2009 (S. Sutono)GoogleMaps  .

Other material examined. INDONESIA: 4♂ 7♀ 1 juv., ZFMK (Ar 20653–54), and  2♀ 1 juv. in pure ethanol, ZFMK (Ind 195), same data as holotypeGoogleMaps  . 1♀, ZFMK (Ar 20655), West Papua, Arfak Mountains, forest near Kamu village (1.102°S, 133.911°E), 1500 m a.s.l., 7.xi.2009 (S. Sutono)GoogleMaps  . 4♂ 7♀, ZFMK (Ar 20656), West Papua, Arfak Mountains, forest along stream above Syobri village (1.114°S, 133.906°E), 1680 m a.s.l., 7.xi.2009 (S. Sutono)GoogleMaps  .

Etymology. The species name is derived from the type locality; noun in apposition.

Diagnosis. Males differ from most congeners (except A. ondawamei  ) by pair of finger-shaped apophyses on male palpal trochanter ( Fig. 281View FIGURES 281–282) and by shape of procursus ( Figs 282View FIGURES 281–282, 284View FIGURES 283–287; three distal elements: whitish oval element with two heavily sclerotized rounded apophyses, and two long hinged elements); from A. ondawamei  by much larger palps (compare Figs 284 and 286View FIGURES 283–287) and by more slender dorsal hinged element of procursus (19 x longer than wide versus 12 x in A. ondawamei  ). Females differ from most congeners (except A. ondawamei  and A. ternate  ) by elongated female internal genitalia and pore plates ( Figs 285View FIGURES 283–287, 296View FIGURES 294–299); from A. ondawamei  by anterior part of internal genitalia much narrower than posterior part ( Figs 295–296View FIGURES 294–299). Males and females also differ from A. ondawamei  by unpaired median mark ventrally on abdomen (paired in A. ondawamei  ; compare Figs 289 and 290View FIGURES 288–293).

Description. Male (holotype). MEASUREMENTS. Total length 5.0, carapace width 1.8. Distance PME-PME 540 µm; diameter PME 170 µm; distance PME-ALE 40 µm; AME absent. Leg 1: 50.9 (12.1 + 0.7 + 12.3 + 21.3 + 4.5), tibia 2: 7.9, tibia 3: 5.7, tibia 4: 8.2; tibia 1 L/d: 75.

COLOR (in ethanol). Carapace ochre yellow with dark brown lateral marginal bands and median band including ocular area; clypeus with dark brown pattern in distal half; sternum monochromous light brown to orange; legs light brown, with indistinct darker rings on femora (subdistal) and tibiae (proximal, subdistal), tips of femora and tibiae lighter. Abdomen ochre-gray, densely covered with dark internal marks dorsally and laterally, with large external mark dorsally in posterior third; ventrally with light brown median marks behind gonopore and in front of spinnerets.

BODY. Habitus as in Figs 267–268View FIGURES 264–271. Eye triads on short stalks directed towards lateral ( Fig. 283View FIGURES 283–287). Thoracic furrow absent (only black median line). Clypeus with pair of short obtuse apophyses close to distal margin ( Fig. 283View FIGURES 283–287). Sternum wider than long (1.15/0.75), unmodified.

CHELICERAE. As in Fig. 283View FIGURES 283–287, with pair of long lateral apophyses directed towards lateral and anterior and pair of small proximal lateral processes.

PALPS. As in Figs 281–282View FIGURES 281–282; coxa unmodified, trochanter with distinctive pair of ventral apophyses, femur with small retrolateral process, ventral protrusion, and larger prolateral process with small apophysis; tarsus small; procursus consisting of heavily sclerotized proximal part and three distal elements ( Fig. 284View FIGURES 283–287): whitish oval element with two heavily sclerotized rounded apophyses, and two long hinged elements, dorsal part widened distally (in dorsal view), ventral part simple and slender; genital bulb with short tubular embolus as only process.

LEGS. Without spines; few vertical hairs; with curved hairs on tibiae 1–2 (few on tibiae 3) and metatarsi 1–2;

retrolateral trichobothrium of tibia 1 at 2.5%; tibia 1 without prolateral trichobothrium (present on other tibiae); tarsus 1 with ~30 pseudosegments, distally distinct. Male (variation). Tibia 1 in 8 other males: 10.7–12.4 (mean 11.7).

Female. In general similar to male ( Fig. 269View FIGURES 264–271) but eye triads not on stalks and closer together (distance PME- PME 260 µm), clypeus unmodified, abdomen anteriorly above pedicel with slightly sclerotized area acting against strong conical elevation medially on carapace. Tibia 1 in 15 females: 8.5–10.7 (mean 9.9). Epigynum long, resulting in posterior position of genital opening ( Fig. 289View FIGURES 288–293); anterior plate barely modified in anterior part, internal valve visible through cuticle, with strong transversal ridges in posterior part ( Fig. 294View FIGURES 294–299); posterior plate simple, apparently without pockets. Internal genitalia with very long pore plates (actually fields of pores), apparently without internal pockets ( Figs 285View FIGURES 283–287, 296View FIGURES 294–299).

Distribution. Known from type locality only ( Fig. 349View FIGURE 349).

Natural history. The species was found in humid forest ( Fig. 336View FIGURES 336–341) among rocks in well-sheltered spaces near the ground, in domed webs of ~ 30 cm diameter. When disturbed, the spiders barely moved and were easy to catch.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Aetana