A FURTHER NEW GENUS AND SPECIES OF COSMETI D FROM THE ANTILLES : ARUCILLUS HISPANIOLICUS GEN. N., SP. N. (ARACHNOIDEA, OPILIONIDEA)

Size: px

Start display at page:

Download "A FURTHER NEW GENUS AND SPECIES OF COSMETI D FROM THE ANTILLES : ARUCILLUS HISPANIOLICUS GEN. N., SP. N. (ARACHNOIDEA, OPILIONIDEA)"

Rodger Randall
5 years ago
Views:

1 Acta entomologica bohemoslovaca VLADIMíR '8ILHAVÝ A FURTHER NEW GENUS AND SPECIES OF COSMETI D FROM THE ANTILLES : ARUCILLUS HISPANIOLICUS GEN. N., SP. N. (ARACHNOIDEA, OPILIONIDEA) ABSTRAC T Description of a further new genus and species of Antillean Cosmetid, krucillu.t hispaniolicus sp. n., from Haiti Island, and gives a review of Cosmetids with unpaire d tergal armature, providing a key for the determination of the known genera of thi s group. Separatu m Tom. 68, No

2 Acta ent. bohemoslov., 68 : , A FURTHER NEW GENUS AND SPECIES OF COSMETI D FROM THE ANTILLES : ARUCILLUS HISPANIOLICUS GEN. N., SP. N. (ARACHNOIDEA, OPILIONIDEA) VLADIMÍR ŠILHAVÝ Czechoslovak Entomological Society, Prah a Received November 17, Six genera with unpaired tergal armature on certain areas are so far know n in the family Cosmetidae SimoN : Cosmetus, Cosmetellus, Cosmetiplus, Vervloeti a and Trinimontius from the subfamily Cosmetinae, and Cosmetigryne from the subfamily Discosomaticinae. In the material of Antillean Opilionids loane d to me for determination from the Museum of Comparative Zoology (Cam - bridge, U.S.A.) thanks to the generosity of Dr. Herbert W. Levi, Curator in Archeology of the Agassiz Museum, I found another new genus, Arucillus gen. n., from Haiti. The unpaired dorsal armature of each genus has the form either of a solid undivided spine (Cosmetiplus, Trinimontius, Cosmetigryne), of a spine composed from twó joint-halfs (Cosmetus, Vorvloetia, Arucillus, sometimes wit h a terminal fork-arucillus) or of a column' (Cosmetellus). This unpaired armature is situated on the third (Cosmetus, Cosmetiplus, Cosmetellus, Vervloetia, Cosmetigryne) or fourth area (Trinimontius, Arucillus), other areas are smoot h or provided with paired tubercles (Cosmetellus, Trinimontius). Both Antillean genera of this group (Trinimontius, Arucillus) differ i n having only six tarsal segments on the first legs, while the genera occurrin g in the American continent possess always more than six segments on th e first tarsi. Key to the genera of Cosmetids with unpaired tergal armatur e Tarsi 1 with 6 segments 2 Tarsi 1 with more than 6 segments 3 2. Area 4 with a composite spine, sometimes terminating in a fork ; other areas smooth (Haiti ) Arucillus gen. n. - Area 4 with a stout undivided spine, areas 1 and 3 with paired tubercles, areas 2 and 5 smoot h (Cuba) Trinimontius ŠILH., Median process on area 3 in the form of a column (Ecuador).. Cosmetellus RoEwER, Median process on area 3 of other form 4 4. Area 3 with a stout median undivided spine 5 - Area 3 with a composite spine 6 6. Paired claws on legs 3 and 4 smooth (Venezuela) Cosmetiplus ROEWER, Paired claws on legs 3 and 4 pectinate (Brazil) Cosmetigryne RoEWER, Anal plate with a prominence (Brazil) Vervloetia SOARES & SOARES, Anal plate unarmed (Brazil) Cosmetus PERTY, Suborder GONYLEPTOMORPH I Cosmetidae SIMO N COsmetinae CAMBRIDG E Arucillus gen. n. Body robust. Eyemound low, smooth and wide ; carapace without tubercl e

or spines. Tergal region divided by shallow transverse grooves. The long process on area 4 composed of 2 tightly adjoining spines ; other areas, free tergites and anal plate smooth. Spiracles visible.

3 or spines. Tergal region divided by shallow transverse grooves. The long process on area 4 composed of 2 tightly adjoining spines ; other areas, free tergites and anal plate smooth. Spiracles visible. Coxa 3 posteriorly with a row of tubercles ; maxillary lobe of coxa 2 with a small ventral projection. Chelicerae of male large, basal segment with a dorsal elevation. Pedipalpi flattened, femora with a ventral row of tubercles, otherwis e unarmed. Legs 1 3 slim, fourth femora of male stout, granulate. Tarsal segments of legs a 1 4 : 6, more than 6, more than 6, more than 6 ; distitarsu s of tarsi 1 and 2 with 3 segments, basitarsus 1 bulky. Tarsi 3 and 4 with a dis - tinct pseudonychium, paired claws simple. Scopulae absent. This new genus is related to Trinimontius SILHAVÝ from Cuba. It differ s in having a composite spine on the fourth area and a bulky basitarsus 1. Arucillus hispaniolicus sp. n. Plate I*, Figs. 1 6 ; Figs. 7, 8 Male holotype : Body length 5.6 mm. Dorsum (Pl. I, Fig. 1, 2) no t granulate, smooth, opaque. Carapace unarmed ; eyemound very low, without -tubercles or spines, eyes widely separate. Areas not clearly indicated. Areas 1, 2, 3 and 5 unarmed, area 4 with a large median spine which is composed of two adjoining spines. Free tergites and anal plate unarmed; abdominal sternites 4-6 laterally with a row of high tubercles. Operculum genitale smooth. Coxae 1 4 with low hair-pointed tubercles, coxa 3 with a posterior ro w of tubercles. Coxa 4 dorsally anteriorly armed with a large tubercle. Chelicerae (Pl. 1, Fig. 3) enlarged. Proximal segment with an elevation, laterally granulate ; distal segment greatly elevated over the dorsum, unarmed. Pedipalpus 5.7 mm long, flattened (Pl. 1, Fig. 4) of the usual form of the member of the family Cosmetidae. Sharp ventral angle of femora with a row of regularly disposed tubercles, other articles unarmed. Legs 9.8, 17. 0, 11.7, 15.7 mm long. Legs 1 2 clothed with scattered hairs ; trochanters 3 and 4 posteriorly with a large pointed tubercle ; femora ventrall y with very low tubercles. Femur, patella and tibia of leg 3 weakly tuberculate (the ventral tubercles larger) ; femur, patella and tibia of leg 4 with some rows of distinct tubercles, other articles inerm, only with hairs. Tarsal segments : 6, 13 14, 7 8, 9. Distitarsi of both first and second tarsi with 3 segments ; basitarsi 1 bulky (Pl. I, Fig. 5). End segments of third and fourt h tarsus with 2 simple claws and a distinct pseudonychium. Penis of the form shown in Fig Colour : Body and extremities reddish brown, distal articles of chelicera e darker, glossy. Carapace and areas with fine brown reticulation ; areas 1 3 with a median whitish fleck situated at the anterior margin and with ver y narrow lighter lines separating areas 1 3 ; a line behind the spine on the fourth area has the form of a V. Holotype locality : Haiti Island, Dominican Republic. Santo Domingo, Loma Rucilla, ft. June 1938, Dr. P. J. Darlington coll. Male paratype (Pl. I, Fig. 6) from the same locality, June 1938, Dr. J. P. Darlington coll. : The length of this paratype is also 5.6 mm ; the spine on the * Plate I will be found at the end of this issue. 139

4 fourth area terminates in a small fork (see Pl. I, Fig. 6) ; tarsal segments, of legs 1 4 : 6, 12 13, 8-9, One other specimen collected by Dr.. Darlington in Loma Rucilla (June 1938) at ft is a young male of body length 5 mm, morphologically scarcely differing from the holotype, with the following number of tarsa l segments : 6, 13-14, 7-8, 9 ; its colour is yellowish-brown. Figs. 7 8 : Arucillus hispaniolicus gen. n., sp. it. 7 Dorsal view of distal part of penis male holotype. 8 Lateral view of distal part of penis ; male holotype. No female is in the collection. The male holotype and 2 paratypes are deposited in the collection of th e Museum of Comparative Zoology, Cambridge, U.S.A. REFERENCE S GOODNIGHT C. J. & M. L., 1942 : Phalangida from Barro Colorado Island, Canal Zone. Amer.. Mus. Novitates, 1198 : RoEwER C. F., 1923 : Die Weberknechte der Erde. Jena. ROEWER C. F., 1927 : Weitere Weberknechte II. II. Ergitnzung der Weberknechte der Erde, Abh. Nat. Ver. Bremen, 26 : RoEwER C. F., 1947 : Diagnosen neuer Gattungen and Arten der Opiliones Laniatores (Arach. ) aus C. F. Roewer ' s Sammlung in Senckenberg-Museum : 1. Cosmetidae. Senckenbergiana, 2 : SOARES B. A. M. & H. E. M., 1946 : Um novo género e duas novas espécies de Opilioes (Opiliones - Cosmetidae, Gonyleptidae). Papeis Dep. Zool. S Paulo. 7 : ŠILHAVÝ V., 1970 : A new phalangid from Cuba, Trinimontius darlingtoni gen. n., sp. n. (Opilio - nes, Cosmetidae). Reichenbachia, 13 : Author' s address : Dr. V. Šilhavý, CSc., Stařeč 3, okr. Třebíč, Czechoslovakia.

5 8ILHAVÝ V., 1970 : A further new genus and species of Cosmetid, from Antilles : Arucillus hispaniolicus gen. n., sp. n. (Arachnoidea, Opilionidea ) Figs. 1 6 : Arucillus hispaniolicus gen. n., sp. n. 1 Dorsal view of scutum, free tergite 1, chelicerae, pedipalpi and basal parts of legs 1 4 ; male holotype. 2 Lateral view of body ; male holotype. 3 Lateral view of chelicera ; male holotype. 4 Medial view of pedipalpus ; male holotype. 5 Tarsus of leg 1 ; male holotype. 6 Dorsal view of scutum, free tergi ces, chelicerae, pedipalpi and parts of legs 1 4 ; male paratype.

6 ACTA ENTOMOLOGICA BOHEMOSLOVACA Published for the Institute of Entomology of the Czechoslovak Academy of Sciences and th e Czechoslovak Entomological Society by Academia, the Publishing House of the Czechoslova k Academy of Sciences (Vodi6kova 40, Praha 1 dod. pl.). 6 issues a year. Annual subscription Kčs 60,. US $ Single copies Kčs 10,. Printed b y Státní tiskárna, n. p., závod 4 (Praha 10, Sámova 12, dod. pú. 101). Orders from abroad should be addressed to : Artia, Ve Smečkách 30, Praha 1 - Nové Město, P. O. Box 790, Czechoslovakia. This number was issued in March Distribution rights for the Western hemisphere : Dr. W. JUNK, Publishers, N. V., 13, van Stolkweg, The Hague, The Netherlands Vertriebsrechte für die ganze Welt mit Ausnahme der sozialistischen Linder : Dr. W. JUNK Verlag, N. V., 13, van Stolkweg, Den Haag, Holland Rozšiřuje poštovní novinová služba. Objednávky a předplatné přijímá PNS - ústřední expedice tisku, administrace odborného tisku, JindfigskA 14, Praha 1. Lze také objednat u každéh o poštovního úřadu nebo doručovatele. Academia, nakladatelství Československé akademie věd, 1971

REICHENBACHI A STAATLICHES MUSEUM FUR TIERKUNDE IN DRESDE N

REICHENBACHI A STAATLICHES MUSEUM FUR TIERKUNDE IN DRESDE N Bd. 13 Ausgegeben : 17. Oktober 197 0 Nr. 14 A new Phalangid from Cuba, Trinimontius darlingtoni gen. n., sp. n. (Opilionidea, Cosmetidae ) with