Amynthas corticis ( Kinberg, 1867 )

Tiwari, Nalini, James, Samuel W. & Yadav, Shweta, 2024, Pheretimoid earthworms of India: new insight from molecular systematics and phylogenetic relationship with new records, Organisms Diversity & Evolution 24 (3), pp. 313-333 : 317

Amynthas corticis ( Kinberg, 1867)

Material examined MNP17-1087-44A13, Yangoupokpi-Lokchao Wildlife Sanctuary, Tengnoupal, Manipur, Lat / Lon : 24.3831, 94.1492, collected on 10th of October 2017, collected by Shweta Yadav. PAN17-1220 (identified using morphoanatomical characterization, it was collected with Metaphire houlleti and subsequently preserved in sample tube PAN17-1217-PAN014; the specimen was not retained for molecular investigations), Satpura National Park , Sahastradhara Waterfalls , Panchmari , Madhya Pradesh, Lat / Lon : 22.5834, 78.5041, elevation: 446.842 m, collected on 1st of October 2017, collected by Ashutosh Vishwakarma ( Fig. 4 ) .

Description Length approx. 83 mm, diameter 2.9 mm. Total number of segments approx. 105. Prostomium open epilobic. First dorsal pore begins from intersegmental region of xi/ xii. Clitellum annular covering three segments, i.e., xiv–xvi, without setae. Female pore single, median on segment xiv, bordered with small, white circular patch. Male pores in segment xviii superficial on oval porophores, approximately one-fourth circumference apart each other with 13 setae intervening between male pores. The spermathecal pores are four pairs in intersegmental region of v/vi/vii/viii/ix. Genital markings small, circular, paired, presetal in segment vii, viii, and ix, also three small circular genital markings present near male pores, curbed within concentric circular folds.

Oesophagus with a single gizzard between septa viii–x and two pairs of intramural calciferous glands in segment xii and xiii. A pair of lateral intestinal caeca originates in segment xxvii and extends up to segment xx. Last pair of heart in segment xiii. Male organ holandric, testis sac in x and xi, two pairs of seminal vesicles in segment xi, xii, prostate absent, duct present in segment xviii. Four pairs of spermathecae present in segment vi–ix, ampulla oval sac, with slender straight stalked diverticulum having oval seminar chamber at its ental end. Stalked glands associated with external genital markings.

Figures

Fig. 4 Amynthas corticis: a gen- ital markings and spermathecal pores; b spermathecal pores; c genital regions; d lateral intestinal caeca and rudimentary prostate; e spermathecae