Henlea perpusilla Friend, 1911

Torii, Takaaki, Akagi, Tomohiro, Uchino, Toru & Kobayashi, Tohru, 2018, New descriptions of enchytraeid species (Clitellata: Enchytraeidae) from Korea, Journal of Species Research 7 (1), pp. 80-91 : 87-88

5. Henlea perpusilla Friend, 1911 ( Fig. 7 )

Henlea perpusilla Friend, 1911: 466 ; Friend, 1912: 585; Dózsa-Farkas and Hong, 2010: 31, Table 1; Dózsa-Farkas, Felföldi and Hong, 2015: 173, Table 1, for complete synonym assign: Rota (1994).

New Korean name: Kkoma-ae-jireongi (꼬ŔOiNjffiḍ)

Material examined. Korea, Jeollabuk-do, Buan-gun, Dongjin-myeon , soil in a rice paddy field of agronomical fields (35°46′05.7″N, 126°43′14.7″E, 17 m asl.), 3 April 2014, Y. Hong coll. ; Jeollabuk-do, Jeonju-si, Chonbuk National University, College of Agriculture & Life Science , soil and litter layers in mountain forest nearby experimental farm (35°50′50.2″N, 127°08′01.8″E), 3 September 2007 and 6 October 2008, Y. Hong coll. ; North Korea, Pyunganbuk-do, Mt. Myohyang, Hyangsan at the branch of Chongchon river , litter layers in deciduous forest, 7 July 1988, Csuzdi coll. ; North Korea, Pyunganbuk-do, Mt. Myohyang, litter layers in deciduous forest, Isonnam near to a waterfall, 8 July 1988, Csuzdi coll.

Diagnosis. 4-10 mm long and 280-310 μm wide worms in vivo, with 25-36 segments. Chaetae straight or slightly bent, up to 5-9 chaetae in ventral bundles. Epidermal gland cells form several rows on prostomium and segments ( Fig. 7A ). Head pore at 0/I, a transverse slit ( Fig. 7A ). Pharyngeal glands free dorsally ( Fig. 7B, E ), occasionally connected in VI. Clitellar gland cells in reticulate pattern or in dense rows. Brain posteriorly straight or slightly concave. Five pairs of preclitellar nephridia from 6/7 to 10/11. Coelomocytes only mucocytes, oval, transparent, finely granulated ( Fig. 7C ). Intestine abruptly widened at 7/8 ( Fig. 7B ), occasionally with slight diverticula-like lateral protrusion in VIII. Dorsal vessel from VIII, blood colorless ( Fig. 7B ). Sperm funnel small, about 1.5 times longer than width ( Fig. 7D ). Spermathecal ectal glands absent or present but small, ectal duct short, ampulla almost as narrow as ectal duct or slightly dilated with gradual transition into common ental ducts, communicate with oesophagus, often form a common spermcontaining chamber ( Fig. 7E ). Surely a complex species with various cytotypes ( Nielsen and Christensen, 1959; Schmelz and Collado, 2010).

Remarks. Genus Henlea Michaelsen, 1889 is currently composed of 35 valid species.

Habitat and distribution. Often at wet soils or almost aquatic sites. Very common and widespread species ( Schmelz and Collado, 2010).

Deposition. NIBRIV0000324914.

Figures

Fig. 7. Micrographs of Henlea perpusilla. A. Head pore (marked with arrow) and epidermal glands; B. Gut widening abruptly in segment VIII(dorsal blood vessel marked with arrow); C. Coelomocytes; D. Sperm funnels(marked with arrows); E. Spermathecae (marked with arrows), first and secondary pharyngeal glands (p). All micrograph in vivo. Scale bars: 50μm.