Modisimus bachata, 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 : 282

publication ID 10.1111/j.1096-3642.2009.00559.x


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scientific name

Modisimus bachata



( Figs 55 View Figures 38–62 , 77 View Figures 63–82 , 169–172 View Figures 166–172 , 200 View Figure 200 )

Type: Male holotype from near La Ciénaga, (~ 19°03 ′ N, 70°53 ′ W), La Vega Prov., Dominican Republic; ~ 1100 m a.s.l., path along river, under dry rolled-up leaves on ground, 9 November 2005 (B.A. Huber), in ZFMK ( DR 19 View Materials a) GoogleMaps .

Etymology: The species name refers to bachata, a form of music and dance that originated in the Dominican Republic and in which tales of heartbreak and sadness are prevalent. The name is used as a noun in apposition.

Diagnosis: Medium-sized species, easily distinguished from congeners by procursus shape ( Fig. 169 View Figures 166–172 ; narrow with dorsodistal projection), and club-shaped hairs on male chelicerae ( Figs 170, 171 View Figures 166–172 ; some hairs on distinct lateral apophyses).

Male (holotype): Total length, 1.9; carapace width, 0.8. Leg 1: 13.9 (3.3 + 0.3 + 3.5 + 5.3 + 1.5); tibia 2, 2.0; tibia 3, 1.6; tibia 4, 2.1. Tibia 1 L/d: 47. Habitus similar to M. jima sp. nov. (cf. Fig. 19 View Figures 17–37 ), carapace pale ochre-yellow, with dark median line and wider dark median band visible through cuticle; ocular area also darker, clypeus with pair of brown stripes; sternum mostly light brown, lighter medially; legs ochre to light brown, tips of femora and tibiae lighter, very indistinct darker rings subdistally on femora and tibiae; abdomen bluish grey, black spots dorsally and laterally; light brown genital area and plate in front of spinnerets. Ocular area elevated; thoracic furrow distinct. PME–PME, 70 Mm; PME diameter, 105 Mm; PME–ALE, 115 Mm; AME tiny, but with lenses. Sternum wider than long (0.6/0.5), unmodified. Chelicerae with short modified hairs in distinctive pattern, each proximal group on prominent apophysis, distal group barely elevated ( Figs 170, 171 View Figures 166–172 ). Palps as in Figure 169 View Figures 166–172 , coxa with indistinct retrolateral apophysis, femur with proximal flap retrolaterally, and distal apophysis ventrally; procursus very slender, with distinctive distal structures (mostly membranous). Legs with many short vertical hairs on all femora; few spines distally on femur 1, about ten spines in two rows distally on each femur 2; no curved hairs; retrolateral trichobothrium on tibia 1 at 13%; prolateral trichobothrium missing on tibia 1, but present on other tibiae; tarsus 1 with ~25 pseudosegments.

Variation: Some males with longer rows of about ten spines each on femur 2, other males without any spines. Tibia 1 in seven other males: 3.2–3.5 (mean 3.4). All males in AMNH appear artificially darkened.

Female: In general, similar to male. Tibia 1 in three females: 2.2, 2.2, and 2.3. Epigynum, a very simple plate ( Fig. 55 View Figures 38–62 ); dorsal view as in Figures 77 View Figures 63–82 and 172 View Figures 166–172 .

Distribution: Known only from the Ciénaga area, in the central Dominican Republic ( Fig. 200 View Figure 200 ).

Material examined: Dominican Republic: La Vega Prov., near La Ciénaga, 1♂, holotype above; same data, 1♂, 3♀ and one juvenile ( ZFMK, DR 19 View Materials ) ; Parque Nacional A. Bermudez, Ciénaga , 1010 m a.s.l., tropical evergreen forest, 19 July–2 August 1995 (S. & J. Peck), 4♂ and two juveniles #95-33 ( AMNH) ; same data but 1100 m a.s.l., 1♂ #95-36 ( AMNH) ; same data but 1020 m a.s.l., 1♂ #95-34 ( AMNH) .


Zoologisches Forschungsmuseum Alexander Koenig


American Museum of Natural History