Modisimus angulatus, 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 : 264

publication ID

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

DOI

https://doi.org/10.5281/zenodo.5491010

persistent identifier

https://treatment.plazi.org/id/03D3130F-7A2C-7422-DFB4-BBBCFA534449

treatment provided by

Valdenar

scientific name

Modisimus angulatus
status

SP. NOV.

MODISIMUS ANGULATUS HUBER & FISCHER SP. NOV.

( Figs 21, 22 View Figures 17–37 , 40 View Figures 38–62 , 129 View Figures 124–129 , 195 View Figure 195 )

Type: Male holotype from near La Toma (18°27.5 ′ N, 70°07.2 ′ W), San Cristóbal Prov., Dominican Republic; degraded forest, 70 m a.s.l., near ground, 7 November 2005 (B.A. Huber), in ZFMK ( DR 3 View Materials ) GoogleMaps .

Etymology: The species name refers to the dorsally angular abdomen.

Diagnosis: Medium-sized species with pair of small projections on male chelicerae, provided with weakly modified hairs ( Fig. 129 View Figures 124–129 ; similar to M. femoratus and M. jima sp. nov.), epigynum very similar to M. femoratus . Distinguished from M. femoratus and M. jima sp. nov. by pattern on sternum (lateral borders of brown marks disrupted; Fig. 22 View Figures 17–37 ), dorsally angular abdomen ( Fig. 21 View Figures 17–37 ), male cheliceral projections slightly wider apart ( Fig. 129 View Figures 124–129 ), and clypeus pattern in males indistinct or even missing.

Male (holotype): Total length, 2.3; carapace width, 0.9. Leg 1, 20.0 (4.9 + 0.4 + 4.9 + 8.2 + 1.6); tibia 2, 3.0; tibia 3, 2.4; tibia 4, 2.8. Tibia 1 L/d: 55. Habitus as in Figures 21 and 22 View Figures 17–37 , carapace pale ochre-yellow, ocular area darker posteriorly, clypeus with very indistinct pair of brown marks, sternum laterally brown, with a distinctively disrupted lateral pattern ( Fig. 22 View Figures 17–37 ), and whitish medially; legs light brown, and femora and tibiae with light tips and dark subdistal rings; abdomen pale greenish grey, with black spots dorsally and laterally, genital area and area in front of spinnerets light brown. Ocular area elevated; thoracic furrow distinct. PME–PME, 70 Mm; PME diameter, 90 Mm; PME–ALE, 105 Mm; AME–AME, 10 Mm; AME diameter, 15 Mm. Sternum wider than long (0.6/0.4), unmodified. Chelicerae as in Figure 129 View Figures 124–129 , very similar to M. femoratus and M. jima sp. nov., but frontal apophyses slightly more widely spaced. Palps very similar to M. femoratus (cf. Fig. 124 View Figures 124–129 ). Legs with short spines on femur 1 (two rows, of ~45 and 15 spines each) and femur 2 (two rows, of ~35 spines each), with many short vertical hairs on all femora; curved hairs on tibiae and metatarsi 2 and 3; retrolateral trichobothrium on tibia 1 at 11%; prolateral trichobothrium missing on tibia 1, present on other tibiae; tarsus 1 with ~25 pseudosegments.

Variation: Tibia 1 in three other males: 4.7–4.9.

Female: In general similar to male; tibia 1 in ten females 3.0–3.4, mean 3.2. Epigynum, similar M. femoratus ( Fig. 40 View Figures 38–62 ); dorsal view not visibly different from M. femoratus (cf. Figs 63 View Figures 63–82 , 126 View Figures 124–129 ).

Distribution and habitat: Known from two localities in the south-central Dominican Republic ( Fig. 195 View Figure 195 ). In the Santo Domingo botanical garden, this species was found in low vegetation and under the roof of a shelter.

Material examined: Dominican Republic: San Cristóbal Prov., near La Toma, 1♂, holotype above, together with 1♀ ( ZFMK, DR 3 View Materials ) . Distrito Nacional, Santo Domingo, Jardín Botánico (18°29.7 ′ N, 69°57.2 ′ W), forest along brook, 50 m a.s.l., low vegetation, near ground, 27 November 2005 (B.A. Huber), 3♂, 7♀ and one juvenile ( ZFMK, DR 110 View Materials ) GoogleMaps ; Santo Domingo, Jardín Botánico , under roof of shelter, 18–22 March 1984 (H. & L. Levi), 1♂ and 2♀ ( MCZ 26.666 View Materials ) . ‘ Boca Caica’ (= Distrito Nacional: Boca Chica ?) 5–7 March 1955 (A. M. Nadler), 4♀ ( AMNH) .

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Modisimus