The Phalangids of Himalayan Expedition of Chiba University 1963

Size: px

Start display at page:

Download "The Phalangids of Himalayan Expedition of Chiba University 1963"

Irma Underwood
5 years ago
Views:

1 of Chiba University 1963 Seisho SUZUKI Zoological Laboratory, Faculty of Science, Hiroshima University, Hiroshima Reprinted from the Japanese Journal of Zoology, Vol. XV (No. 2), p. 115,..,

2 of Chiba University ) Seisho SUZUKI Zoological Laboratory, Faculty of Science, Hiroshima University, Hiroshima In the Himalayan Expedition of Chiba University 1963 Dr. K. Yoda gathered a few phalangids, which were sent to the author by Prof. Dr. M. Numata, leader of the expedition for identification. The collection was consisted of four species of the Gagrellinae including three new species. Of great interest is the finding of a new genus belonging to the tribe Zaleptini. All the specimens are regarded as the typical members of the Oriental Region. The holotypes and pa.ratypes of the species described are deposited in the Zoological Laboratory, Faculty of Science, Hiroshima University, Hiroshima. Subord. Eupnoi (Hansen et Soerensen) Fam. Leiobunidae Silhavy Subfam. Gagrellinae Banks Trib. Gagrellini Banks 1. Melanopa unicolor Roewer (Fig. 1 and PI. I A-B) Melanopa unicolor, Roewer, 1912, p. 35; 1923, p. 939; 1929, p. 117; 1955a, p.101. This species was established by Roewer (1912) basing on the female specimen. Afterwards the male was recorded from Nepal (Roewer, 1955a), but no male description was given by him. The body of the male is much smaller than the female (PI. I A-B). The tibia of palpus strikingly differs in the armament between the both sexes (Fig. 1 A-C). In the male the segment is entirely unarmed, whereas in the female it is strongly armed laterally below with numerous teeth as seen in Fig. 1 B-C. The penis is as shown in Fig. 1 D-E; corpus penis alate, slightly curved in the profile. Measurements (in mm): Male. Body, 5.40 long, 2.91 wide at widest portion. Palpus: Trochanter, 0.30 long, 0.25 wide; femur, 1.00 L, 0.25 W; patella, 0.67 L, 0.33 W; tibia, 0.74 L, 0.27 W; tarsus, 1.32 L, 0.16 W. Total length, Length of femora: I 4.9, II 8.0, III 5.0, IV 7.3. Total length of legs: I 25.1, II 42.2, III 25.5, IV ) "Biota and Ecology of Eastern Nepal" edited by M. Numata-Results of the Chiba University Scientific Expedition to the Nepal Himalaya, 1963 (No. 6)

3 116 Variation: The present genus is characterized by having only one nodule on the second femur. However, even among the two specimens examined the number of noduli was found to be subject to a variation. Namely, in one specimen it was unusually two in one side, while it was normally one in the opposite side. Locality: 1 ('), 1 Sf., Junbesi (altitude: 2,680 m), Nepal, May 27, 1963 (Kyoji Yoda). Distrib~dion: India, Nepal, and Burma. j\ ). ~': c 1' \, D 'd I/,~ 117 high, just in front of the thoracic tergite, from the side only slightly constricted basally, slants more or less posteriorly (Fig. 2 B), above wider than below, shallowly canaliculate above, and the carinae each armed with a row of numerous very sharply pointed teeth. The supra-cheliceral lamellae bluntly pointed, armed with a few very small tubercles anteriorly. The edge of the marginal humps of the first to fourth coxae straight blunted as shown in Fig. 2 E. Surface of the coxae covered with small granules, the genital operculum anteriorly so, the sternites smooth (PI. I D). Chelicera normal, the proximal segment armed with a cluster of several blunt teeth above and a large pointed spine below, in addition, a longitudinal series of hair-tipped granules on the medial surface below. The distal segment normal, set dorsally with sparse short hairs, and very short spine-like hairs and small tubercles distally on the medial surface. Palpus long, normal; trochanter armed ventrally with a few pointed teeth; femur, from above a little widened distally, in the profile nearly straight, the ventral surface and the distal portion above armed with small pointed teeth; patella enlarged distally but without an apophysis at inner tip, dorsally with small pointed teeth; tibia elongate, slightly concave above on the distal twothirds of the ventral surface, with only a few obsolete teeth proximally on the lateral surface. Tarsus slender, lightly arched, almost equal to tibia plus patella, the inner lower edge armed with a longitudinal row of small blunt tubercles. Legs slender and long; trochanters armed on both lateral surfaces with fine teeth or spinules; femora and patellae with sparse spinules; remaining leg-segments with only short hairs. The second femur with two noduli, the first, third and fourth femora with no noduli. Fig. 1. Melanopa unicolor Roewer. A. Left palpus of male, lateral 26x. B. The same of female, lateral and C. tibia, below. 26x. D. Dorsal and E. lateral views of penis. 20x. Trib. Zaleptini Banks 2. Hypsibunus yodai2 ) n. sp. (Fig. 2 and PI. I C-D) Female.-Measurements (in mm): Cephalothorax, 1.10 long, 2.05 wide; abdomen, 2.05 L, 2.15 W. Total body length, Palpus: Femur, 1.00 L, 0.20 W; patella, 0.48 L, 0.25 W; tibia, 0.75 L, 0.16 W; tarsus, 1.23 L, 0.11 W. Total length, Length of femora: I 7.3, II 12.3, III 6.7, IV 9.7. Total length of legs: I 34.2, III Body small, the cephalothorax about five-edged, free tergites of abdomen turned below and the abdomen truncate behind. Lateral margins of the cephalothorax lightly curved above each coxa. Hard parts of the dorsum thickly and coarsely granulated. Eye-tubercle: 0.40 mm wide, 0.43 mm long and 0.50 mm 2) This species is named after its collector. Fig. 2. Hypsibunus yodai n. sp., male. A. Dorsum of the body. 15 x. B. Eyetubercle, profile. 29x. C. Left chelicera, medial. 29x. D. Left palpus, lateral. 29x.. E. A part of anterior marginal humps of coxa 1. 46x. F. Penis. 19x.

4 118 Color: Surface of the body, especially the carapace and the coxae of legs are thickly covered with waxy secretions. The carapace rusty brown, laterally darkened, with a large golden yellow area in front of the eye-tubercle and on either side of this light ground lying a diagonal series of rusty brown spots; two short brown streaks from the frontal margin of the cephalothorax to the eye-tubercle, but not extending to the latter; Thoracic segments rusty brown, anteriorly margined with black and with a transverse row of small golden yellow spots. Abdomen dorsal rusty brown, sides broadly darkened; central figure of abdomen is poorly developed, which is slightly darker than adjacent areas; abdominal segments with a pair of small, rounded, yellowish spots which are confined to the central figure, and a transverse series of dark dots on the central figure, and a transverse series of dark dots on the narrow lighter border between the segments of abdomen, in addition, the third abdominal segment with a faint yellowish median stripe. Eye-tubercle rusty brown with a yellowish ridge. Venter concolorous with the dorsum but darker, sternites each with a transverse row of small light spots. Chelicera rusty to dark brown, the proximal segment with a silvery white patch distally above; the distal segment distally lighter. Palpus dark brown except for a tarsus which is light. Trochanters of legs above rusty brown, below darker, remaining leg-segments dark brown. Penis. Corpus penis, 1.74 mm long, 0.20 mm wide at base; glans penis, 0.26 mm long; distal tube, 0.04 mm long. Corpus penis flattened, alate; distal tube very short. Type: Holotype male, Junbesi (altitude: 2,680 m), Nepal, May 27,1963 (K. Yoda). Remarks: The present new species is most closely related to Hypsibunus scab er Roewer 1910 from Annan, from which it can be distinguished by the marking of the dorsum of body and the armament of eye-tubercle. lar, abdominal scutum coarsely so. Eye-tubercle: 0.38 mm wide, 0.41 mm long and 0.50 mm high, close to the. first thoracic tergite, slightly constricted basally, slants posteriorly, canaliculate above and set with numerous. small pointed teeth around the eyes, teeth.more numerous above, less numerous below. The supracheliceral lamellae small, bluntly pointed, unar.med. The edge of small humps of the marginal rows of all coxae straight blunted as shown in Fig. 3 D. Surface of the coxae granular, granulations. more numerous and more coarsely on the first coxa than on the rest; the genital operculum only anteriorly granular; the sternites smooth. The proximal segment of chelicera armed dorsally at the center with a cluster of several blunt teeth, and ventrally with a large pointed spine; the distal segment with a longitudinal row of very small tubercles on the medial surface. Palpus normal; trochanter toothed below; femur armed ventrally and distally above with numerous small pointed teeth; patella widened distally but without an apophysis at inner end, set with fine teeth; tibia similarly toothed except for distal portion above; tarsus hirsute. Trochanters of all legs armed oh both anterior and posterior surfaces with fine spinules; femora and patellae with sparse spinules, the rest of leg-segments clothed with only short hairs. The second femur with two noduli in one side but three in the opposite side, remaining femora without noduli. Color: Carapace golden yellow with a diagonal series of small brown spots on either side and two short, narrow, pale brown streaks on the mid-frontal 3. Hypsibunus gibber 3 ) n. sp. (Fig. 3 and PI. I E) Femalel.-Measurements (in mm): Cephalothorax, 1.29 long, 2.25 wide; abdomen, 4.13 L, 2.80 W. Total body length, Chelicera: Proximal segment, 0.80 L, 0.40 W; distal segment, 1.45 L, 0.33 W. Palpus: Trochanter, 0.31 L, 0.20 W; femur, 1.00 L, 0.22 W; patella, 0.50 L, 0.27 W; tibia, 0.75 L, 0.20 W; tarsus, 1.40 L, 0.11 W. Total length, Length of femora: I 5.8, II 10.8, III 5.5, IV 8.4. Total length of legs: I 27.9, II 57.6, III 27.2, IV Dorsum of the body long oval, the abdomen widened and pointed posteriorly. Two thoracic tergites well developed and the first five abdominal tergites fused into a hard scutum, and the tergites, except for the first, toward the lateral margin is not flat, but convex, almost humped, especially prominently so on the fourth tergite (PI. I E). Hard part of the dorsum uniformly granu3) The specific name is an adjective meaning hump-backed. Fig. 3. Hypsibunus gibber n. sp., female. A. Eye-tubercle, lateral view. 29 x. B. Left chelicera, medial. 29x. C. Left palpus, lateral. 29x. D. A part of anterior marginal humps of coxa X. 119

5 120 area. Eye-tubercle rusty yellow with a black eye-ring, the carinae golden yellow. Thoracic tergites rusty brown with blackish anterior margin and a transverse row of small rounded, golden yellow spots across the segment. Abdominal scutum rusty to dark brown, broadly darkened in the median, with a narrow, pale transverse band marking the border between the segments, in addition, abdominal segments with numerous irregular golden yellow spots, on the fourth segment they are arranged in a transverse series along the anterior margin, and a faint yellowish median stripe ranging from the first to the third segments. Hard parts of free tergites uniformly deep rusty brown with golden yellow spots. The ventral surface of body thickly covered with grayish white secretions. The coxae of all legs deep reddish brown, distally darker; genital operculum pale, marked with dark spots; sternites reddish brown medially, sides lighter and with a narrow pale grayish yellow interspace marking the border. Chelicera yellowish brown, the proximal segment darkened above and below, and with a large silvery white patch on the distal margin above; the distal segment darkened at both extremities. Palpus rusty brown except for tarsus which i'j pale yellow. Legs. Trochanters above golden yellow with a pale yel,lowish brown patch in the middle, below deep reddish brown; femora reddish to dark brown with a blackish caput and numerous broad light bands (PI. I E), about eight in the second, and five to six in the remaining femora; patellae with a pale spot on both extremities, reddish brown between; tibiae likewise with a broad pale band on both extremities, in addition to these, tibiae with numerous pale rings, the same on the metatarsi and tarsi. Type: Holotype female, Junbesi (altitude: 2,680 m), Nepal, May 27, 1963 ] 21 Chelicera: Proximal segment, 0.85 L, 0.56 W; distal segment, 1.70 L, 0.38 W. Palpus: Trochanter, 0.33 L, 0.25 W; femur, 1.10 L, 0.25 W; patella, 0.64 L, 0.35 W; tibia, 0.77 L, 0.28 W; tarsus, 1.65 L, 0.18 W. Total length, Length of femora: I 9.0, II 17.3, III 8.9, IV Total length of legs: I 41.3, II 84.5, III 40.8, IV The body relatively large, ellipsoidal, rounded posteriorly (PI. I F); hard parts of the dorsum granular, in particular, the scutum densely and coarsely so. Eye-tubercle: 0.50 mm wide, 0.45 mm long and 0.47 mm high, from' the side above wider than below, shallowly canaliculate above and the carinae each armed with a row of about five obsolete tubercles, which are very low, blunt and sometimes tipped with a short hair. The supra-cheliceral lamellae bluntly pointed, unarmed. The edge of small humps of the marginal rows of the first to fourth coxae as shown in Fig. 4 D. Surface of all coxae coarsely garnular (PI. I G); genital operculum only anteriorly so, sternites smooth. (R. Yoda). Remarks: The dorsal humps on the abdominal scutum and the banded femora of legs are sufficient to separate the present species from other members of the genus. H exazaleptus 4 ) n. gen. The number of noduli on the femora of legs is I 0: II 6: III 0: IV O. Eye-tubercle armed with obsolete tubercles, but no strong spines. The first and third femora cylindrical and longer than the body. Type-species: H exazaleptus junbesi n. sp. Remarks: In the number of noduli on the second femur, the present genus is allied to the genus Ceratobunus Thorell, however, the former is distinguished from the latter in having no strong spines on the eye-tubercle. 4. Hexazaleptus junbesi 5 ) n. sp. (Fig. 4 and PI. IF-G) Female.-Measurements (in mm):. Cephalothorax, 1.61 L, 3.61 W; abdomen, 4.52 L, 3.87 W. Total body length, ) 5) Hexa, in Greek, means six. The specific name is a noun in apposition after the type locality. Fig. 4. Hexazaleptlls junbesi n. sp., female. A. Eye-tubercle, profile. 29 X. B. Right chelicera, medial. 29x. C. Right palpus, medial. 29x. D. A part of anterior marginal humps of coxa X. Chelicera normal, the proximal segment armed dorsally with one or two blunt teeth, ventrally with a strong pointed spine and a row of short hairs on the medial surface; the distal segment glabrous except for short hairs on the medial surface. The palpus relatively strong; trochanter armed distally below with pointed teeth. Femur slightly widened distally, nearly straight from the side; the ventral surface armed with numerous teeth, teeth more numerous and stronger

6 122 distally, less strong proximally, and a diagonal row of blunt tubercles on the proximal half of the medial surface. Patella widened distally but without an apophysis at inner tip, clothed, excepting below, with pointed teeth. Tibia moderately widened, thoroughly covered with very short hairs and a few obsolete teeth on the lateral surface. Tarsus elongate, longer than patella plus tibia, slightly arched, hirsute. Trochanters of all legs possess a few fine teeth on both lateral margins. Femora, patellae and tibiae with scattered teeth, teeth more numerous on the femora, less numerous on the patellae and tibiae. Metatarsi and tarsi with only short hairs. The second femur bears six noduli, the rest without noduli. Color: The carapace golden yellow with broadly darkened hind margin; brown markings being disposed on the light ground as follows: three dark brown blotches on the frontal margin, one large dark spot near the lateral margins between the coxa II-III, and Ill-IV, and a diagonal series of irregular spots which increasing in size posteriorly on each side (PI. I F). Eye-tubercle golden yellow with a slightly lighter base. The last thoracic segment dark brown with a transverse row of numerous golden yellow spots which are ar ranged very closely and increasing in size laterally. Abdomen dorsal rusty to dark brown with a very poorly developed central figure, which is slightly darker than adjacent areas, restricted to the first five abdominal tergites; scutal segments with a large rounded golden yellow blotch in the middle and laterad of the central figure, with small golden yellow spots; free tegites likewise rusty brown with numerous golden yellow spots. Coxae of all legs rusty brown, distally darker, a large golden yellow blotch at the center (PI. I G), marginal humps deep reddish brown; genital operculum golden yellow with rusty brown spots; sternites pale rusty brown with a broad golden yellow band. The proximal segment of chelicera rusty brown with a silvery white distal margin; the distal segment yellowish brown, both sides slightly darkened. Palpus. Trochanter and femur rusty brown, femur distally darker; patella entirely dark brown; tibia and tarsus pale yellowish brown, tibia clouded at both extremities. Legs. Trochanters above golden yellow with small rusty brown dots, below uniformly rusty brown to dark; femora yellowish brown, distally darker, with a light spot near the distal margin above; patellae dark brown with small pale spots above; remaining leg-segments yellowish brown, tibiae with a broad faint distal band. Type:' Holotype female, Junbesi (altitude :2,680 m), Nepal May 19, 1963 (K. Yoda). The author wishes to thank Dr. M. Numata for placing the material at his disposal. He also wishes to thank the collector, Dr. K. Yoda. 123 REFERENCES ROEWER,.C. Fr.. :910, Revision del' Opiliones Plagiostethi (=Opiliones Palpatores). 1. Tell. Famlhe del' Phalangiidae (Subfamilien: Gagrellini, Liobunini, Leptobunini). Abh. naturw. Ver., 19, ,.1~12, Einige neue Gattungen und Arten del' Opiliones Palpatores aus den SubfamllIen del' Gagrellinae und Liobuninae del' Familie del' Phalangiidae. Arch Naturg., 78 A, ROEWER, C. Fr , Die Weberknechte del' Erde ; Jena (Gustav Fischer).,1929, On a collection of Indian Palpatores (Phalangiidae) with a revision of the continental genera and species of the subfamily Gagrellinae Thorell. Rec. Ind. Mus., 31, , 1955a, Indoaustralische Gagrellinae (Opiliones, Arachnidae). (Weitere Weberknechte XVIII). 3. Teil. Senck. bioi., 36, , 1955b, Idem. 4. Teil (Schluss). Ibid., 36, SUZUKI, S. Four phalangids from Eastern Himalayas; (in press). EXPLANATION OF PLATE I A-B. Melanopa unicolor Roewer; A. male, B. female, lateral views. 6x. C-D. Hypsibunus yodai n. sp., ~ ; C. dorsal, b. ventral views. 6x. E. Hypsibunus gibber n. sp., ~ ; lateral view. 6x. F-G. Hexazaleptus junbesi n. sp., ~ ; F. dorsal G. ventral views. 6x.

7 124

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