AnimaliaNot EvaluatedacceptedspeciesAccepted
Orobdella shimadae
GBIF:119406063
ABOUT
Descriptions(6)
Description of holotype. Body firm, muscular, BL 100.9 mm, BW 6.3 mm (Fig. 8). Caudal sucker ventral, oval, its diameter slightly smaller than maximum body width (Fig. 9 D). In life, dorsal surface greenish yellow, ventral surface whitish yellow, dorsal surface darker than ventral surface. In preservative, color faded, without any dark lines. Somite I completely merged with prostomium (Fig. 9 A). Somite II uniannulate, not separated from I (Fig. 9 A). Somite III uniannulate (Fig. 9 A). Somite IV biannulate (Fig. 9 A). Somite V biannulate, a 3 forming posterior margin of oral sucker (Fig. 9 A, B). Somites VI triannulate (Fig. 9 A, B). Somite VII complete triannulate, a 1 = a 2 a 2 = b 5> c 11 = c 12 (Fig. 9 A, B). Somite IX complete sexannulate, b 1 c 11 = c 12. Somites X – XXV complete sexannulate, b 1 c 11 = c 12, or b 1 = b 2 c 11 = c 12 (Fig. 9 C – E), X b 5 the first annulus of the clitellum, XIII a 2 the last annulus of the clitellum. Somite XXVI sexannulate dorsally, b 1 = b 2 = a 2 c 11 = c 12, quinquannulate ventrally, b 1 = b 2 = a 2
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
Diagnosis. In life, dorsal surface greenish yellow, ventral surface whitish yellow. Somite VII triannulate. Somite VIII quinquannulate. Somites IX – XXV complete sexannulate. Somite XXVI quinquannulate. Pharynx reaching to XVI. Gastropore absent. Gastroporal duct narrow, tubular, descending to XV a 2. Male gonopore in XI b 5 / c 11 or at anterior of XI c 11, close to b 5 / c 11. Female gonopore in XIII b 1 / b 2 or at anterior of XIII b 2, close to b 1 / b 2. Gonopores separated by nine annuli. Pre-atrial loop present, extending to ganglion XI. Atrial cornua absent.
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
Remarks. Orobdella shimadae is extremely similar to Orobdella dolichopharynx in Amamioshima Island. In Orobdella shimadae, however, its gastroporal duct is reaching only to XV b 2 (to XVI b 2 in O. dolichopharynx). In accordance with the strict morphological uniqueness, Orobdella leeches from Okinawajima Island and Amamioshima Island is treated as the two distinct species, O. shimadae and O. dolichopharynx, respectively in this study.
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
Distribution and ecology. Known from the mountain region of the northern part of Okinawajima Island in the Ryukyu Archipelago, Japan (Fig. 1). Leeches were found under rocks or fallen leaves.
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
Etymology. The specific name is a noun in the genitive case formed from the Latinized name of Mr. Taku Shimada who collected many valuable specimens of this species from Okinawajima Island.
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
Materials examined. Holotype. KUZ Z 128, mature specimen of 100.9 mm in body length, dissected, collected from in the soil along the Okuyona Forest Road (alt. 100 m, 26 ° 49.0´N, 128 ° 16.5´E), Kunigami, Okinawajima Island, Okinawa Pref., Japan, by Taku Shimada on April 9, 2010. Paratypes (a total of nine specimens collected from Okinawajima Island, Japan). Six specimens collected by Taku Shimada: KUZ Z 125 from Kunigami on February 15, 2010; KUZ Z 126, dissected, and KUZ Z 127, dissected, from Higashi on April 9, 2010; KUZ Z 130, dissected, from near the type locality on June 17, 2010; KUZ Z 137, and KUZ Z 138, dissected, from the Okuni Forest Road (26 ° 40.2´N, 128 ° 11.2´E), Higashi, on September 6, 2010; and KUZ Z 139 from the Okuyona Forest Road around the Benoki Dam (26 ° 47.0´N, 128 ° 16.3´E), Kunigami, on September 7, 2010. Two specimens collected from around the Benoki Dam, Kunigami on August 24, 2010: KUZ Z 131 (alt. 176 m, 26 ° 47´20 ˝ N, 128 ° 15´22 ˝ E), dissected, by Takafumi Nakano; KUZ Z 132 (alt. 191 m, 26 ° 47´22 ˝ N, 128 ° 15´21 ˝ E), by Keiko Tsubokawa.
Nakano, Takafumi (2011): Redescription of Orobdella ijimai (Hirudinida: Arhynchobdellida: Gastrostomobdellidae), and two new species of Orobdella from the Ryukyu Archipelago, Japan. Zootaxa 2998: 1-15, DOI: 10.5281/zenodo.207870
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CLASSIFICATION
Taxonomic Classification Tree
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Media Files(3)
FIGURE 1. Location of collecting localities in this study. The locality numbers are referred to as follows: the type locality of, (1) Orobdella ijimai Oka, (2) Orobdella dolichopharynx sp. nov., and (3) Orobdella shimadae sp. nov.
Imageimage/png© Nakano, TakafumiNakano, Takafumi
FIGURE 8. Orobdella shimadae sp. nov., holotype, KUZ Z 128. (A) Dorsal, and (B) ventral surface. Scale bar, 5 mm.
Imageimage/png© Nakano, TakafumiNakano, Takafumi
FIGURE 9. Orobdella shimadae sp. nov., holotype, KUZ Z 128. (A) Dorsal, and (B) ventral views of somites I – VIII. (C) Dorsal and (D) ventral views of somites XXV – XXVII and caudal sucker. (E) Ventral view of somites XI – XIII. (F) Ventral view of gastroporal duct. (G) Ventral view of female gonopore. (H) Dorsal view of reproductive system including ventral nervous system. (I) Dorsal view of male atrium. (J) Dorsal view of female reproductive system including position of ganglion XIII. Scale bars, 1 mm (A – F, H), 0.5 mm (I, J), 0.25 mm (G).
Imageimage/png© Nakano, TakafumiNakano, Takafumi
IMAGES