Charinus magua

Seiter, Michael, Schramm, Frederic D. & Schwaha, Thomas, 2018, Description of a new Charinus species (Amblypygi: Charinidae) from the Monseñor Nouel province, Dominican Republic, Zootaxa 4438 (2), pp. 349-361: 350-358

publication ID

https://doi.org/10.11646/zootaxa.4438.2.9

publication LSID

lsid:zoobank.org:pub:89D1A63B-19C7-457D-B618-1003FD0EAB53

persistent identifier

http://treatment.plazi.org/id/2264F1DC-62EA-45C9-B51C-917061EBF673

taxon LSID

lsid:zoobank.org:act:2264F1DC-62EA-45C9-B51C-917061EBF673

treatment provided by

Plazi

scientific name

Charinus magua
status

sp. nov.

Charinus magua  sp. nov.

urn:lsid:zoobank.org:act:2264F1DC-62EA-45C9-B51C-917061 EBFAbout EBF 673

Type material: One adult male (Holotype, NHMW 29153View Materials) Subida a Casabíto, Monseñor Nouel province, Dominican Republic, N19°1.643' W70°22.762', 382 m a.s.l., leg. Seiter, Schramm, Nigl & Teruel, September 2016GoogleMaps  ; one adult female + two protonymphae (Paratype, NHMW 29154View Materials), Subida a Casabíto, Monseñor Nouel province, Dominican Republic, N19°01.581' W70°28.828'; 795 m a.s.l., leg. Seiter, Schramm, Nigl & Teruel, September 2016GoogleMaps  ; two subadult specimens (Paratype, NHMW 29155), same data as NHMW 29154View Materials; one adult female (Paratype, NHMW 29156View Materials)GoogleMaps  , same data as holotypeGoogleMaps  .

Comparative diagnosis: Charinus magua  sp. nov. is unique by the following combination of characters: Pedipalp femur ventrally with 2 spines (Fv; C. dominicanus  and C. bahoruco  bear 3), pedipalp patella dorsally with 3 spines (Pd; C. dominicanus  bears 3 and C. bahoruco  bears 3–4). Carapace with median eyes absent, lateral eyes reduced (in C. dominicanus  and C. bahoruco  median eyes also absent but lateral eyes well developed), frontal process large and prominent in females, less pronounced in the holotype male (in C. dominicanus  not visible and in C. bahoruco  it is only slightly visible in males from above). Cheliceral claw with 2–4 teeth. Tritosternum cylindrical and elongated (double in length compared to C. dominicanus  and C. bahoruco  ), trito-, tetra- and pentasternum with 2, 1 and 1 pair of setae, respectively. Leg I with 21–22 tibial and 37–38 tarsal articles (in C. dominicanus  21/33 and in C. bahoruco  21/37). First (proximal) tarsal segment of leg I about five times longer than the second (comparable in C. dominicanus  and C. bahoruco  ). Leg IV with trisegmented basitibia, tarsomer II of legs II–IV with a pale but complete translucent membranous ring (similar to C. dominicanus  and C. bahoruco  ). Distitibia of leg IV with 16 trichobothria (similar to C. dominicanus  and C. bahoruco  ) with bc closer to bf than to sbf (similar in C. bahoruco  , bc closer to s bf than to bf in C. dominicanus  ). Female gonopods cushion-like with lateral projections directed backwards, projections not sclerotized. See Table 1 for a comparison of major and most deviating characters among all known Caribbean and Central American Charinus  species.

Etymology: The species is named after the historical Taíno chiefdom of Maguá which included the region that is now the Dominican province of Monseñor Nouel. The name Maguá is used as a noun in apposition.

Description of male holotype: Color in life ( Fig. 1 View Figure ): uniformly yellowish to brownish, pedipalps and legs slightly darker, chelicera and tips of pedipalps reddish, opisthosomal tergites greenish, whitish intersegmental membranes between sternites and tergites.

Pedipalps ( Fig. 2 View Figure ): all segments densely covered by minute granules and short setae except for the distal tarsus and claw. Trochanter ( Fig. 2C, E, D View Figure ) densely covered with large setae, a single large seta on the anterodorsal margin, a single well pronounced (long and thick) anteroventral spine covered with 12 large setae, one single spine on the inner surface of the trochanter facing the pedipalp femur. Femur ( Fig. 2C, D View Figure ) dorsally with three large primary spines (Fd-1> Fd-2> Fd-3), each spine with one seta located half-way to the tip; externally five large setiferous tubercles, the two most basal ones very close to each other, almost aligned with the primary spines; ventrally with two large primary spines (Fv-1> Fv-2) and two setiferous tubercles anteriorly of Fv-1 and posteriorly of Fv-2, respectively, aligned in one row; seven setae of various size on the apical margin. Patella ( Fig. 2 A, B View Figure ) dorsally with three large spines (Pd-1> Pd-2> Pd-3), each spine harboring at least one seta (up to three), one large prominent setiferous tubercle between Pd-1 and the distal margin, one small bifid setiferous tubercle after Pd-3; several smaller setae on the dorsal margin of the pedipalp patella; ventrally with two large primary spines (Pv-1> Pv-2) without subdivisions; three small setae aligned with the primary spines in between, with three large setiferous tubercles and several small setae on the ventral surface of the pedipalp patella. Tibia ( Fig. 2A, B View Figure ) dorsally with two long spines, Td-1 twice as long as Td-2 (Td-1> Td-2); nine setiferous tubercles and several small setae between the spines and on the dorsal margin of the pedipalp tibia; ventrally with one single large spine and one setiferous tubercle close to the base of Tv-1; several small setae on the ventral margin of the pedipalp tibia. Tarsus ( Fig. 2A, B View Figure ) dorsally with two long spines with Bd-1 more than twice as long as Bd-2 (Bd1> Bd-2); several small setae on the dorsal margin of the pedipalp tarsus; ventrally spineless with several small setae on the ventral margin of the pedipalp tarsus; cleaning organ well developed. Claw/ Posttarsus ( Fig. 2A, B View Figure ) moderately long, sharp and evenly curved inwards.

Carapace ( Fig. 3F, I View Figure ): cordiform, 1.23 times wider than long, with minute granules on the surface and scattered with few setulae all over; frontal process less developed (however large and prominent in the female paratypes; in males of C. dominicanus  the frontal process is not visible and in males of C. bahoruco  only slightly visible from above ( Fig. 3D, E, G, H View Figure )), frontal margin wide and convex with eight thick but short setae facing forward; median eyes absent, lateral eyes less developed and unpigmented (compare to the more developed lateral eyes in C. dominicanus  and C. bahoruco  ( Fig. 3D, E View Figure )) with a single seta on their posterior margin.

Sternum ( Fig. 3C View Figure ): sternites all moderately sclerotized and very densely granulose; tritosternum long, twice as long as wide, (compare to the short tritosterna in C. dominicanus  and C. bahoruco  ( Fig. 3A, B View Figure )) apically narrow with a pair of thick (macrosetae) apical and a pair of thick basal setae, an additional pair of thin setae located in between the two pairs of thick setae; tetrasternum and pentasternum wider than long with large median pairs of macrosetae.

Chelicera ( Fig. 4F View Figure ): basal segment with four internal teeth, the most distal tooth bicuspid (less separated than in C. dominicanus  and C. bahoruco  ( Fig. 4D, E View Figure )), the proximal cusp shorter, basal segment with a single vestigial external tooth; claw with 2–4 flat crenulations.

Legs ( Fig. 4C View Figure , 5E, F View Figure ): all slender and long, femora densely covered with minute tubercles and setae of various size, arolium present on all walking legs; leg I flagellum with 21–22 tibial and 37–38 tarsal articles; first tarsal segment about five times longer than second ( Fig. 5F View Figure ), tarsomer II of legs II–IV with a pale but complete translucent membranous ring ( Fig. 5E View Figure ) (similar to C. dominicanus  and C. bahoruco  ( Fig. 5A, C View Figure )); leg IV with trisegmented basitibia, trichobothrium bt in the middle of the distal pseudo-article of basitibia of leg IV; 16 trichobothria on the distitibia of leg IV with bc closer to bf than to sbf ( Fig. 5C View Figure ) (similar trichobothriotaxy in C. bahoruco  , in C. dominicanus  bc closer to s bf than to bf ( Fig. 5A, B View Figure )).

Male reproductive organ: large genital operculum, posterior margin rounded with several setae on its margin; spermatophore organ wider than long, soft with sclerotization (semicircle form) at the border of fistula and lobus lateralis primus; from dorsal view lobus dorsalis and lobus lateralis primus narrow, the latter one being broader, lobus dorsalis secundus small; from ventral view lobus dorsalis primus and lobus dorsalis secundus prominent, larger than lobus dorsalis, processus internus tapered, lamina medialis small but present.

Description of female paratypes ( Fig. 6 View Figure ): very similar to holotype male; frontal process visible from above; genital operculum small and narrow with several small setae on its posterior margin; female gonopods cushion-like with lateral projections directed backwards, projections not sclerotized; gonopod with a flat thin apex, posteriorly forming an apical sharp edge, atrium of the gonopod large.

Measurements (in mm): male holotype ( NHMWAbout NHMW 29153): Carapace length/width (1.99/2.45), pedipalp femur length (0.98), pedipalp patella length (1.32), pedipalp tibia length (0.72), pedipalp tarsus and claw length (0.87); female paratype ( NHMWAbout NHMW 29154): Carapace length/width (1.69/2.13), pedipalp femur length (0.90), pedipalp patella length (0.95), pedipalp tibia length (0.63), pedipalp tarsus and claw length (0.65).

The cerotegument ultrastructure of known Dominican Charinus  ( Fig. 7 View Figure ): In Charinus  species from the Dominican Republic the carapace is covered by regular spherical globules which commonly range from ~2–3 µm in diameter. With a diameter of ~2–2.5 µm Charinus magua  sp. nov. has the smallest globules. In Charinus bahoruco  these structures have a diameter of ~2.5–2.9 µm and in Charinus dominicanus  of ~3–3.2 µm. The globule surface of C. bahoruco  and C. dominicanus  resemble each other and correspond to the same granular type whereas the globule surface of C. magua  sp. nov. shows a particle network with nanopores.

Natural habitat and distribution ( Fig. 1E–F View Figure , 8 View Figure ): The two known localities in the Monseñor Nouel province are situated between 382 and 795 m above sea level and represent the highest altitude record for Charinus  from Hispaniola. All specimens were found underneath various-sized stones, partially buried in the soil and in part densely covered with wet and dry leaf litter. Both locations harbor a small waterway. At the same location Phrynus longipes Pocock, 1894  and another undescribed phrynid whip spider species were also found.

EBF

Hubei Forestry Institute

NHMW

Naturhistorisches Museum, Wien