Indomarengo likaliku, Dhiya’Ulhaq , 2025

Indomarengo likaliku Dhiya’ulhaq sp. nov.

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Figs 17–20 View Fig View Fig View Fig View Fig

Diagnosis

Indomarengo likaliku Dhiya’ulhaq sp. nov. is most similar to Indomarengo chandra Benjamin, 2004 and Indomarengo sarawakensis Benjamin, 2004 , but males can be distinguished from those of I. chandra by an indistinct velum (vs pronounced in I. chandra [ Benjamin 2004: fig. 42a–b]), more coiled embolus (2.5× vs 1.5×), broader palpal bulb, and tight sperm duct arrangement on retrolateral side of tegulum, touching each other ( Fig. 18B–C, D–E View Fig vs sperm duct rather loose); and from those of I. sarawakensis by a ventrally bent RTA ( Fig. 18C, E View Fig vs dorsally tilted in I. sarawakensis [ Benjamin 2004: fig. 38e]). Females can be distinguished from those of I. sarawakensis by a shorter epigynal atrium; distinct, pea-shaped spermathecae (vs rather indistinct, hardly discernible from copulatory ducts); and differences in posterior region of copulatory ducts, with more prominent horizontal coils ( Fig. 20B, D View Fig vs coils more prominently vertical [ Benjamin 2004: fig. 39b–c]).

Etymology

The specific epithet is taken from the Indonesian word ‘ lika-liku ’, roughly meaning ‘twists and turns’, referring to the complex twists and turns of the copulatory and sperm ducts.

Material examined

Holotype

INDONESIA – Jambi Province • ♂; Sarolangun, Pauh, Semaran ; 2°08′35.9″ S, 102°51′04.5″ E; elev. 45 m; 16 Jul. 2013; J. Drescher leg.; canopy fogging in jungle rubber plantation; GOET 2013_ BJ5.1_AraSalt004N_001 (to be transferred to MZB). GoogleMaps

Paratypes

INDONESIA – Jambi Province • 1 ♀; same data as for holotype; GOET 2013_BJ5.1_AraSalt004N_002 (to be transferred to MZB) GoogleMaps • 2 ♂♂, 1 ♀; Sarolangun, Bukit Duabelas National Park ; 1°59′42.6″ S, 102°45′08.0″ E; elev. 69 m; 8 Oct. 2013; J. Drescher leg.; canopy fogging in rainforest; ZMH ZMH-A0031821 to ZMH-A0031823 GoogleMaps • 1 ♂; Sarolangun, Bukit Duabelas National Park ; 1°56′30.8″ S, 102°34′50.6″ E; elev. 91 m; 4 Oct. 2013; J. Drescher leg.; canopy fogging in rainforest; GOET 2013_ BF4.2_AraSalt004N_001 (deposited at SMF) GoogleMaps .

Description

Male ( Figs 17–18 View Fig View Fig )

MEASUREMENTS. Total length 3.22. Carapace length 1.77; width 1.16. Opisthosoma length 1.45; width 0.98. Diameter of eyes: AME 0.40; ALE 0.19; PLE 0.14. Interdistances between eyes: ALE–ALE 0.70; ALE–PLE 0.49; PLE–PLE 0.84. Clypeus height 0.09. Leg measurements: leg I 2.72 (0.80, 0.27, 0.89, 0.48, 0.28); leg II 2.04 (0.63, 0.23, 0.52, 0.40, 0.26); leg III 1.92 (0.61, 0.18, 0.42, 0.44, 0.27); leg IV 2.77 (0.94, 0.27, 0.70, 0.58, 0.28).

HABITUS AND COLORATION. Carapace reddish-brown, flat, with dorsal protuberance on posterior half; surface granulated; patches of white setae on posterior end as well as between eyes. Chelicerae red; dentition: promarginal absent, three retromarginal. Opisthosoma oval, reddish-brown, posterior half darker in color, with faint transverse light band in middle; dorsally almost wholly covered in scutum. Leg I much thicker than other legs, especially tibia and tarsus; predominantly reddish-brown; tibia I with three pair of ventral spines and long tibial setae; metatarsus I with two pairs of ventral spines; rest of legs pale with lateral dark markings. Spinnerets basally light-brown, distally pale.

PALP ( Fig. 18 View Fig ). Tibia length-to-width ratio 1.40. RTA laterally tapering to narrow, rounded tip; slightly ventrally bent at anterior third. Cymbium oval. Tegulum bullet-shaped. Sperm duct S-shaped, tightly arranged on retrolateral side. Embolus long and thin, coiled approximately 2.5 times; apex slightly raised.

Female ( Figs 19–20 View Fig View Fig )

MEASUREMENTS. Total length 3.25. Carapace length 1.57; width 1.00. Opisthosoma length 1.68; width 1.18. Diameter of eyes: AME 0.37; ALE 0.14; PLE 0.15. Interdistances between eyes: ALE–ALE 0.68; ALE–PLE 0.42; PLE–PLE 0.67. Clypeus height 0.09. Leg measurements: leg I 2.17 (0.66, 0.28, 0.65, 0.35, 0.23); leg II 1.69 (0.53, 0.23, 0.40, 0.31, 0.22); leg III 1.58 (0.48, 0.17, 0.35, 0.35, 0.23); leg IV 2.36 (0.77, 0.25, 0.59, 0.52, 0.23).

HABITUS AND COLORATION. Female habitus as in male, except following: opisthosoma without dorsal scutum; leg I less drastically thicker, with shorter tibial setae.

EPIGYNUM ( Fig. 20 View Fig ). Epigynal plate bell-shaped, longer than wide. Atrium semicircular. Copulatory openings facing anteriorly. Copulatory ducts very long and convoluted, with several bends and loops. Spermathecae small and pea-shaped. Fertilization ducts laterally oriented, twice length of spermathecae, arising from posterior region of latter.

Distribution

Sumatra: Jambi Province.

Natural history

All specimens were collected by canopy fogging in rainforests and jungle rubber plantations and are considered arboreal.