Nyctimus rendang Dhiya'ulhaq & Benjamin 2025, sp. nov.

Nyctimus rendang Dhiya’ulhaq & Benjamin sp. nov. Figs 13, 14, 15 Etymology. The specific epithet refers to a meat dish associated with the cuisine of the Minangkabau people from West Sumatra. The meat is slow-cooked in a plethora of spices, giving it a dark colouration. The dark colour of N. rendang, sp. nov., is reminiscent of the colour of this dish. Type material. Holotype. Indonesia – Sumatra, Jambi Province • ♂; Sarolangun, Air Hitam, Desa Baru; 02°01'49.5"S, 102°46'14.8"E; elev. 57 m; 12 Jul. 2013; J. Drescher leg.; canopy fogging in jungle rubber plantation; GOET 2013_BJ 6.1_AraThom 010 N_001 (to be transferred to MZB). Paratypes. Indonesia – Sumatra, Jambi Province • 1 ♂ 1 ♀; same data as holotype; GOET 2013_BJ 6.1_AraThom 010 N_002, 003 (to be transferred to MZB). • 2 ♂♂; Batang Hari, Bajubang, Singkawang; 01°47'07.9"S, 103°16'37.4"E; elev. 56 m; 18 Jun. 2013; J. Drescher leg.; canopy fogging in jungle rubber plantation; GOET 2013_HJ 4.2_AraThom 010 N_001, 002 (to be transferred to ZMH). Other material examined. Indonesia – Sumatra, Jambi Province • 1 ♀; Batang Hari, Hutan Harapan Conservation Area; 02°11'15.3"S, 103°20'36.0"E; elev. 69 m; 7 Aug. 2013; J. Drescher leg.; canopy fogging in rainforest; GOET 2013_HF 4.1_AraThom 036 N_001. Diagnosis. Males are similar to N. quadripunctatus, sp. nov., in having a sickle-shaped embolus and in the general shape of the bulb, but the VTA is digitiform and free (Fig. 15 A, B; vs hook-shaped, attached to RTA in N. quadripunctatus, Fig. 11 A, B) and the RTA possesses a pillar-shaped ventral lobe and paired, thick spines (vs both absent). Females are distinct in having the spermathecae with a posterior extension and a short, barely noticeable CD (Fig. 11 D). Description. Male (holotype 2013 _ BJ 6.1 _ AraThom 010 N _ 001; Figs 13, 15 A, B). Total length 2.41. Prosoma length 1.16; width 1.03. Opisthosoma length 1.25; width 1.21. Diameter of eyes: AME 0.07; ALE 0.15; PLE 0.14; PME 0.05. Interdistances between eyes: AME – AME 0.35; AME – ALE 0.08; ALE – ALE 0.62; PME – PME 0.32; PME – PLE 0.24; ALE – PLE 0.17; AME – PME 0.19; PLE – PLE 0.77. Leg measurements: leg I 3.36 (0.90, 0.29, 0.92, 0.75, 0.50); leg II 3.46 (1.04, 0.32, 0.84, 0.75, 0.51); leg III 2.11 (0.67, 0.20, 0.54, 0.38, 0.32); leg IV 2.25 (0.75, 0.18, 0.59, 0.42, 0.31). Prosoma cuboid, almost as long as wide, dark reddish brown; surface weakly granulated; laterally adorned with long macrosetae, each arising from a small tubercle. Chelicerae, and sternum coloured as prosoma. Endites brown with white tip. Front legs brown; back legs brown except for the white femora. Opisthosoma round, dark brown with paired white bars in the middle; dorsally covered with scutum; five large sigillae present, arranged in a triangular formation. Palp (Figs 13 C, D, 15 A, B): cymbium oval. Embolus sickle-shaped. Tegulum with a small triangular projection next to the embolus; tegular hood small. RTA bilobed; ventral lobe finger-shaped; dorsal lobe wide trapezoid, apically with a pair of short, thick spines. VTA long, finger-shaped, apically flexed. Female (paratype AraThom 010 N _ 2013 _ BJ 6.1 _ 003; Figs 14, 15 C, D). Total length 3.86. Prosoma length 1.67; width 1.43. Opisthosoma length 2.19; width 2.21. Diameter of eyes: AME 0.08; ALE 0.18; PLE 0.19; PME 0.07. Interdistances between eyes: AME – AME 0.55; AME – ALE 0.12; ALE – ALE 0.90; PME – PME 0.45; PME – PLE 0.34; ALE – PLE 0.23; AME – PME 0.23; PLE – PLE 1.11. Leg measurements: leg I 4.85 (0.71, 1.01, 1.18, 0.49, 1.46); leg II -; leg III 3.05 (1.00, 0.30, 0.75, 0.54, 0.46); leg IV 3.41 (1.14, 0.32, 0.83, 0.65, 0.47). Habitus as in male, except opisthosoma not covered in scutum. Epigynum (Fig. 14 C, D, 15 C, D): exterior plate with irregular border. Atrium inconspicuous. CO semicircular, posteriorly facing. CD very short. Spermatheca oval, anteriorly with a large bump, posteriorly extended. Distribution. Indonesia (Sumatra: Jambi) (Fig. 19). Remarks. One specimen shows rounded rather than oval spermathecae (Fig. 14 E) and is, thus, tentatively placed here, as no males from the same locality were found.

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Zenodo (CERN European Organization for Nuclear Research)
Published
2025-10-09
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https://doi.org/10.5281/zenodo.17307023
Primary Topic
Genomic variations and chromosomal abnormalities
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article

Nyctimus rendang Dhiya'ulhaq & Benjamin 2025, sp. nov.

Zenodo (CERN European Organization for Nuclear Research)
Genomic variations and chromosomal abnormalities
article

Nyctimus rendang Dhiya'ulhaq & Benjamin 2025, sp. nov.

article en

Abstract

Nyctimus rendang Dhiya’ulhaq & Benjamin sp. nov. Figs 13, 14, 15 Etymology. The specific epithet refers to a meat dish associated with the cuisine of the Minangkabau people from West Sumatra. The meat is slow-cooked in a plethora of spices, giving it a dark colouration. The dark colour of N. rendang, sp. nov., is reminiscent of the colour of this dish. Type material. Holotype. Indonesia – Sumatra, Jambi Province • ♂; Sarolangun, Air Hitam, Desa Baru; 02°01'49.5"S, 102°46'14.8"E; elev. 57 m; 12 Jul. 2013; J. Drescher leg.; canopy fogging in jungle rubber plantation; GOET 2013_BJ 6.1_AraThom 010 N_001 (to be transferred to MZB). Paratypes. Indonesia – Sumatra, Jambi Province • 1 ♂ 1 ♀; same data as holotype; GOET 2013_BJ 6.1_AraThom 010 N_002, 003 (to be transferred to MZB). • 2 ♂♂; Batang Hari, Bajubang, Singkawang; 01°47'07.9"S, 103°16'37.4"E; elev. 56 m; 18 Jun. 2013; J. Drescher leg.; canopy fogging in jungle rubber plantation; GOET 2013_HJ 4.2_AraThom 010 N_001, 002 (to be transferred to ZMH). Other material examined. Indonesia – Sumatra, Jambi Province • 1 ♀; Batang Hari, Hutan Harapan Conservation Area; 02°11'15.3"S, 103°20'36.0"E; elev. 69 m; 7 Aug. 2013; J. Drescher leg.; canopy fogging in rainforest; GOET 2013_HF 4.1_AraThom 036 N_001. Diagnosis. Males are similar to N. quadripunctatus, sp. nov., in having a sickle-shaped embolus and in the general shape of the bulb, but the VTA is digitiform and free (Fig. 15 A, B; vs hook-shaped, attached to RTA in N. quadripunctatus, Fig. 11 A, B) and the RTA possesses a pillar-shaped ventral lobe and paired, thick spines (vs both absent). Females are distinct in having the spermathecae with a posterior extension and a short, barely noticeable CD (Fig. 11 D). Description. Male (holotype 2013 _ BJ 6.1 _ AraThom 010 N _ 001; Figs 13, 15 A, B). Total length 2.41. Prosoma length 1.16; width 1.03. Opisthosoma length 1.25; width 1.21. Diameter of eyes: AME 0.07; ALE 0.15; PLE 0.14; PME 0.05. Interdistances between eyes: AME – AME 0.35; AME – ALE 0.08; ALE – ALE 0.62; PME – PME 0.32; PME – PLE 0.24; ALE – PLE 0.17; AME – PME 0.19; PLE – PLE 0.77. Leg measurements: leg I 3.36 (0.90, 0.29, 0.92, 0.75, 0.50); leg II 3.46 (1.04, 0.32, 0.84, 0.75, 0.51); leg III 2.11 (0.67, 0.20, 0.54, 0.38, 0.32); leg IV 2.25 (0.75, 0.18, 0.59, 0.42, 0.31). Prosoma cuboid, almost as long as wide, dark reddish brown; surface weakly granulated; laterally adorned with long macrosetae, each arising from a small tubercle. Chelicerae, and sternum coloured as prosoma. Endites brown with white tip. Front legs brown; back legs brown except for the white femora. Opisthosoma round, dark brown with paired white bars in the middle; dorsally covered with scutum; five large sigillae present, arranged in a triangular formation. Palp (Figs 13 C, D, 15 A, B): cymbium oval. Embolus sickle-shaped. Tegulum with a small triangular projection next to the embolus; tegular hood small. RTA bilobed; ventral lobe finger-shaped; dorsal lobe wide trapezoid, apically with a pair of short, thick spines. VTA long, finger-shaped, apically flexed. Female (paratype AraThom 010 N _ 2013 _ BJ 6.1 _ 003; Figs 14, 15 C, D). Total length 3.86. Prosoma length 1.67; width 1.43. Opisthosoma length 2.19; width 2.21. Diameter of eyes: AME 0.08; ALE 0.18; PLE 0.19; PME 0.07. Interdistances between eyes: AME – AME 0.55; AME – ALE 0.12; ALE – ALE 0.90; PME – PME 0.45; PME – PLE 0.34; ALE – PLE 0.23; AME – PME 0.23; PLE – PLE 1.11. Leg measurements: leg I 4.85 (0.71, 1.01, 1.18, 0.49, 1.46); leg II -; leg III 3.05 (1.00, 0.30, 0.75, 0.54, 0.46); leg IV 3.41 (1.14, 0.32, 0.83, 0.65, 0.47). Habitus as in male, except opisthosoma not covered in scutum. Epigynum (Fig. 14 C, D, 15 C, D): exterior plate with irregular border. Atrium inconspicuous. CO semicircular, posteriorly facing. CD very short. Spermatheca oval, anteriorly with a large bump, posteriorly extended. Distribution. Indonesia (Sumatra: Jambi) (Fig. 19). Remarks. One specimen shows rounded rather than oval spermathecae (Fig. 14 E) and is, thus, tentatively placed here, as no males from the same locality were found.

Zenodo (CERN European Organization for Nuclear Research)
IPB University (ID), National Institute of Fundamental Studies (LK), Institute of Zoology (KZ), University of Göttingen (DE)
Life in Land
Openalex Percentile: Top 34%
Genomic variations and chromosomal abnormalities
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