Megalobulimus conicus ( Bequaert, 1948 ), 2021

Silva, Fernanda dos Santos & Simone, Luiz Ricardo L., 2022, Anatomy of two species of Megalobulimus (Strophocheilidae, Megalobuliminae) from South-Central Bahia, Brazil, Papéis Avulsos de Zoologia 62, pp. 1-13 : 7

Megalobulimus conicus ( Bequaert, 1948) ( Figs. 6-9 )

Synonymy, see Silva et al., 2021 (complement).

Megalobulimus conicus: Birckolz et al., 2016:150 ; Salvador, 2019: 93.

Type locality: Maranhão, Brazil.

Occurrence: Brazil (Amazonas, Maranhão, Bahia, and Tocantins states) ( Simone, 2006; Salvador et al., 2015).

Material examined: BRAZIL: Bahia; Mortugaba , 15°01′42.20″S, 42°22′30.79″W, MZSP 143688 , 1 spm (F.S. Silva col. 03/i/2018) ; Cordeiros , 15°02′23.90″S, 41°56′02.07″W MZSP 136647 , 4 sh (F.S. Silva col. 17/i/2018) .

Measurements: n = 2; shell length = 90,1 ± 0,9; shell width 51,3 ± 1,2.

Figures

Figure 6. Megalobulimus conicus: (A-C) Shells of specimen from Mortugaba,Bahia state,MZSP143688 (L = 89,5 mm,W = 50,0 mm),(A) apertural view;(B)lateral view;(C) abapertural view; (D-F) Shells of specimen from Cordeiros,Bahia state, MZSP 136647 (L = 90,8 mm,W = 52,2 mm), (D) apertural view; (E) lateral view; (F) abapertural view.

Figure 7. Megalobulimus conicus,MZSP 143688:(A) pulmonary pallial cavity,an(anus),rt (rectum),se (septum);(B) jaw,anterior view.Scale = 10 mm;(C-D) radula,in SEM.Scales = 0,1 mm;(C) marginal teeth;(D) central region,rachidian tooth.

Figure 8. Megalobulimus conicus, MZSP 143688 anatomy: (A) pallial cavity, renopericardial region, ventral view; (B) buccal mass closed; (C) odontophore dorsal view;(D) odontophore ventral view;(E) visceral mass;digestive region.Scales (A,E) = 10 mm; Scales (B-D) = 5 mm.

Figure 9. Megalobulimusconicus, MZSP143688 anatomy:(A) genital system,complete dorsalview;(B)carrefour region,ventralview.Scale = 10 mm;(C) spermoviduct andvaginalappendixopened longitudinally;(D)spermoviduct,cross-sectionat itsmiddleregion;(E)penisandepiphallus openedlongitudinally.Scales=5 mm.