Modisimus seguin, 2010

Huber, Bernhard A., Fischer, Nadine & Astrin, Jonas J., 2010, High level of endemism in Haiti’s last remaining forests: a revision of Modisimus (Araneae: Pholcidae) on Hispaniola, using morphology and molecules, Zoological Journal of the Linnean Society 158 (2), pp. 244-299 : 274

publication ID

https://doi.org/ 10.1111/j.1096-3642.2009.00559.x

DOI

https://doi.org/10.5281/zenodo.5491020

persistent identifier

https://treatment.plazi.org/id/03D3130F-7A26-7428-DFDA-BD32FAB347A5

treatment provided by

Valdenar

scientific name

Modisimus seguin
status

SP. NOV.

MODISIMUS SEGUIN HUBER & FISCHER SP. NOV.

( Figs 27–29 View Figures 17–37 , 47 View Figures 38–62 , 70 View Figures 63–82 , 88 View Figures 83–93 , 98 View Figures 94–103 , 148–151 View Figures 148–153 , 199 View Figure 199 )

Type: Male holotype from near Seguin, at 18°18.2 ′ N, 72°17.5 ′ W, Dept Sud-Est, Haiti GoogleMaps ; 990 m a.s.l., leaf litter in forest over coffee and banana plantations, 28 November 2007 (B.A. Huber), in ZFMK ( Haiti 4a) .

Etymology: The species name refers to the type locality; it is used as a noun in apposition.

Diagnosis: Medium-sized species with pale callus-like area posteriorly on male abdomen ( Figs 27, 28 View Figures 17–37 ; similar to M. roumaini sp. nov.), modified hairs of various lengths on male chelicerae ( Figs 88 View Figures 83–93 , 149 View Figures 148–153 ; similar to M. roumaini sp. nov.); distinguished from M. roumaini sp. nov. by shape of epigynum ( Figs 47 View Figures 38–62 , 150 View Figures 148–153 ; wider scape), internal sclerites in female genitalia ( Figs 70 View Figures 63–82 , 151 View Figures 148–153 ), and numerous spines on male femora.

Male (holotype): Total length, 3.1; carapace width, 1.35. Leg 1: 33.2 (8.3 + 0.6 + 8.3 + 13.6 + 2.4); tibia 2, 5.5; tibia 3, 4.4; tibia 4, 5.9. Tibia 1 L/d: 67. Habitus as in Figures 27–29 View Figures 17–37 , carapace pale ochre-white, with wide brown lateral margins posteriorly, thoracic furrow also dark brown; ocular area light brown, clypeus with pair of lateral brown bands; sternum medially brown with light spot behind labium, and pale ochre-yellow to whitish laterally; legs light brown, tips of femora and tibiae whitish, darker rings subdistally on femora (indistinct on tibiae); abdomen bluish grey, dorsally (except heart area) and laterally densely covered with black spots, with some small light-bluish spots forming disrupted lines, with distinctive pale area posteriorly; genital area and area in front of spinnerets light brown, bluish spot in-between. Ocular area strongly elevated; thoracic furrow distinct. PME–PME, 150 Mm; PME diameter, 135 Mm; PME–ALE, 175 Mm; AME–AME, 20 Mm; AME diameter, 25 Mm. Sternum wider than long (0.9/ 0.7), unmodified. Chelicerae with ~30 modified hairs on each side, mediodistal hairs clearly longer than the others ( Figs 88 View Figures 83–93 , 149 View Figures 148–153 ). Palps as in Figure 148 View Figures 148–153 , coxa with retrolateral apophysis, femur with rounded proximal and pointed distal ventral apophyses; procursus without dorsal spine-like process ( Fig. 98 View Figures 94–103 ), curved towards femur distally, bulb with large, curved apophysis, and complex membranous subdistal projections. Legs with spines on femora 1 and 2; femur 1 with prolateral row (~30 spines not reaching tip) and retrolateral row (~20 very weak spines not reaching tip); femur 2 with four rows, prolateral (~25 spines, not reaching tip), prolateroventral (18 spines), retrolateroventral (20 spines), and retrolateral (~20 spines, almost until tip); all femora with many short vertical hairs; curved hairs on tibiae 1–3 and metatarsi 2–4; retrolateral trichobothrium of tibia 1 at 11%; prolateral trichobothrium missing on tibia 1, present on all other tibiae. Tarsus 1 with ~30 pseudosegments.

Variation: Tibia 1 in four other males: 7.6, 7.9, 8.2, 8.5.

Female: In general similar to male, but without callus-like area posteriorly on abdomen. Tibia 1 in six females: 5.9–6.6 (mean 6.2). Epigynum, with tongueshaped scape, and distinctive dark sclerites ( Figs 47 View Figures 38–62 , 150 View Figures 148–153 ); dorsal view as in Figures 70 View Figures 63–82 and 151 View Figures 148–153 .

Distribution and habitat: Known from type locality only ( Fig. 199 View Figure 199 ). This species was found in the same piles of dead banana leaf bases on the ground as M. epepye sp. nov., but in the dryer upper parts.

Material examined: Haiti: Dept Sud-Est, near Seguin, 1♂, holotype above; same data, 5♂, 7♀ and four juveniles ( ZFMK, Haiti 4/5); same data, 3♀ and two juveniles, in pure ethanol ( ZFMK, Haiti 81) .

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Modisimus