Calapnita dayak , Bernhard A. Huber, 2017

Bernhard A. Huber, 2017, Revision and cladistic analysis of the Southeast Asian leaf-dwelling spider genus Calapnita Simon (Araneae, Pholcidae), Zootaxa 4219 (1), pp. 1-63: 39

publication ID

10.5281/zenodo.273086

publication LSID

lsid:zoobank.org:pub:0FA0F51A-3868-4F13-A93D-E34CA5A689F8

persistent identifier

http://treatment.plazi.org/id/03B66F68-8514-0716-FF6A-FF122BA5F915

treatment provided by

Plazi

scientific name

Calapnita dayak
status

sp. nov.

Calapnita dayak  sp. nov. Figs 164–171View FIGURES 156 – 171

Calapnita vermiformis  ” (misidentification; only specimens listed below): Deeleman-Reinhold 1986b: 212. Huber 2011: 48.

Diagnosis. Distinguished from most species of vermiformis  group (except C. bugis  ) by wide obtuse tip of ventral flap of procursus ( Fig. 164View FIGURES 156 – 171); from most (except C. bario  ) also by long and slender palpal tibia (tibia length/width>2.5; Fig. 286View FIGURES 285 – 288); from several species also by very small proximal part of bipartite cheliceral apophyses ( Fig. 168View FIGURES 156 – 171), by narrow and distinct epigynal ‘knob’ ( Fig. 170View FIGURES 156 – 171), and by oval pore plates converging anteriorly and very close together ( Fig. 171View FIGURES 156 – 171).

Etymology. Dayak  is a loose term for over 200 riverine and hill-dwelling ethnic subgroups located principally in the interior of Borneo; noun in apposition.

Material examined. Holotype. INDONESIA-BORNEO: ♂, RMNHAbout RMNH ( ARA 17814View Materials), Central Kalimantan, Tumbang Tahai (2.033°S, 113.583°E), primary marshy forest, from leaves, 3/ 13.ix.1985 (S. Djojosudharmo).GoogleMaps 

Other material. INDONESIA-BORNEO: 1♂ 1♀, RMNHAbout RMNH ( ARA 17424View Materials), same data as holotypeGoogleMaps  . 1♂ 1♀, RMNHAbout RMNH ( ARA 17421View Materials), Central Kalimantan, Kaharian (2.033°S, 113.667°E), swampy primary forest, in foliage, 2– 16.ix.1985 (S. Djojosudharmo)GoogleMaps  . 1♂ 1♀, RMNHAbout RMNH ( ARA 17427View Materials), Central Kalimantan, 40 km NW Palangkaraya [~ 1.96°S, 113.75°E?], secondary forest, from leaves, ix.1985 (S. Djojosudharmo).GoogleMaps 

Assigned tentatively. INDONESIA-BORNEO: 1♂ 1♀, ZFMKAbout ZFMK (Ar 5330), East Kalimantan, Balikpapan [~ 1.25°S, 116.833°E], primary forest, 20.vii.1982 (Murphy, 11872 part).GoogleMaps 

Description. Male (holotype)

MEASUREMENTS. Total body length 3.5, carapace width 0.5. Leg 1: 25.4 (6.5 + 0.3 + 5.5 + 10.9 + 2.2), tibia 2: 4.2, tibia 3: 2.6, tibia 4: 4.7; tibia 1 L/d: 110. Distance PME-PME 160 µm, diameter PME 70 µm, distance PME- ALE ~30 µm; no trace of AME.

COLOR. Entire animal pale gray to whitish, legs slightly yellowish with brown patellae and tibia-metatarsus joints.

BODY. Habitus as in close congeners (cf. Figs 122, 124View FIGURES 120 – 127); ocular area barely elevated, each triad on very low hump; carapace without median furrow; clypeus unmodified; sternum as wide as long (0.40), unmodified.

CHELICERAE. As in Figs 168–169View FIGURES 156 – 171, apophyses near lamellae bipartite with small proximal part, with pair of barely visible lateral processes; without modified hairs; without stridulatory ridges.

PALPS. In general similar to C. vermiformis  (cf. figs 139 and 140 in Huber 2011); trochanter apophysis as in Fig. 167View FIGURES 156 – 171; femur as in Fig. 166View FIGURES 156 – 171, distal process at 50% of femur length; tibia very slender ( Fig. 286View FIGURES 285 – 288), length/diameter 0.44/0.15; procursus as in Figs 164–165View FIGURES 156 – 171, with simple ventro-distal flat sclerite; bulb length 0.30; embolus length 0.58; embolus tip with distinct fringes.

LEGS. Without spines and curved hairs; few vertical hairs; trichobothria on tibia 1 and tarsus 1 pseudosegments not seen.

Male (variation). Tibia 1 in 2 other males: 5.5, 6.1. The male from East Kalimantan shares the distinctively slender palpal tibia but is significantly larger and therefore assigned tentatively (tibia 1 missing; palpal tibia length/ diameter 0.59/0.18; bulb length 0.38; embolus length 0.80).

Female. In general similar to male, also eye triads at same distance. Tibia 1 in 3 females: 5.5, 5.6, 5.8. Epigynum as in Fig. 170View FIGURES 156 – 171, weakly sclerotized triangular plate with small and slender anterior ‘knob’; internal genitalia as in Fig. 171View FIGURES 156 – 171, longer than wide, with oval pore plates close together.

Distribution. Known from Central Kalimantan and (specimens assigned tentatively) East Kalimantan ( Fig. 283View FIGURE 283).

RMNH

National Museum of Natural History, Naturalis

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Calapnita

Loc

Calapnita dayak

Bernhard A. Huber 2017

2017
Loc

Calapnita vermiformis

Huber 2011: 48
Deeleman-Reinhold 1986: 212

1986