Pilosphaera yentoensis , Lee, Yen-Chen, Lue, Kuang-Yang & Wu, Wen-Lung, 2008

Lee, Yen-Chen, Lue, Kuang-Yang & Wu, Wen-Lung, 2008, Molecular evidence for a polyphyletic genus Japonia (Architaenioglossa: Cyclophoridae) and with the description of a new genus and two new species, Zootaxa 1792, pp. 22-38: 31-34

publication ID


persistent identifier


treatment provided by


scientific name

Pilosphaera yentoensis

new species

Pilosphaera yentoensis  new species

Type locality. Both holotype and paratypes were collected from Yen-To town near Nan-Xi River in Zhejiang province, China (28 ° 18 ’ 32.7 ” N; 120 ° 32 ’ 30 ” E). Gathered from grass slope under leaves.

Holotype. Shell length (= SL): 5.17 mm, shell width (= SW): 5.27 mm; Aperture length (= APL): 2.82 mm, Aperture width (= APW): 2.82 mm; NMNSAbout NMNS 5635 -001.

Paratype 1. SL: 5.27 mm, SW: 5.49 mm; APL: 3.10 mm, APW: 2.93 mm; NMNSAbout NMNS 5635 -002. Paratype 2. SL: 5.38 mm, SW: 5.63 mm; APL: 2.83 mm, APW: 2.83 mm; NMNSAbout NMNS 5635 -003. Paratype 3. SL: 4.38 mm, SW: 4.63 mm; APL: 2.38 mm, APW: 2.35 mm; NMNSAbout NMNS 5635 -004. Paratype 4. SL: 4.63mm (apex missing), SW: 5.33mm; APL: 2.50mm, APW: 2.68mm; ASIZ

MLSP 104201301.

Etymology. The name honors the Yen-To Town, primary locality of this species.

Description. Shell ( Fig. 5View FIGURE 5 A–F) small, 5.17–5.27 mm in length and 5.27–5.49 mm in width. Shell turbinate and conical-globe shape, with moderately convex whorls 5–5.25 in number. Shell is festucine in color with reddish brown longitudinal stripes. Surface sculptured with several indistinct spiral cords, covered with festucine-coloured dull periostracum and regular periostracal lamellae, interval with irregular fine growth lines. There are three regular rows of periostracal hairs between the sutures on the penultimate whorl. There is no periostracal hair and the periostracum is polished under the peripheral line. The periostracum hairs are sometimes entirely lost, perhaps in old shells such as holotype. Umbilicus open, deep. The aperture is nearly circular. The peristome is interrupted, with reflected outer lip. The operculum is translucent ceratoid, a little concave center, multispiral type with very thin pellucid edge.

There is an orange red snout between two purplish gray tentacles on the head. Dark gray foot covered by two dark gray lobes which have pale colored edges. The lobes joined posteriorly and forming a pale colored groove. ( Fig. 7View FIGURE 7 A–B)

Remarks. The present species differs from its only known congener Pilosphaera zebra  in dark gray soft body color ( Fig. 7View FIGURE 7 A–C) and in having fewer periostracal hairs ( Fig. 5View FIGURE 5 A–I, 8 A–B). The latter species has 5–6 regular rows of periostracal hairs between the sutures on the penultimate whorl compared to three in the new species. The shell base of P. z e b r a has 6–7 rows of periostracal hairs, but these are not present on the new species ( Fig. 5View FIGURE 5). P. z e b r a also has 4–7 rows of tiny periostracal hairs immediately below the suture ( Fig. 8View FIGURE 8 B), which are not present in the new species. In COIAbout COI gene data, the average distance between this new species and Pilosphaera zebra  was = 0.160, which was closer to the average distance among cyclophorid species (0.198) than to within species comparisons (0.061).


National Museum of Natural Science


University of Coimbra Botany Department