A new species of <i>Habeas</i> (Eupulmonata, Urocoptidae) from Canarana region, Bahia, Brazil

A new species of the recently described genus Habeas is described. The genus is the single urocoptid representant in Brazil. The new species is named as Habeas centroris, occurring in Paz de Salobro, Canarana, Bahia, Brazil. It is mainly characterized by its dense, delicate sculpture, peristome slightly centrally positioned. Its anatomy is similar to what is currently known, differing mainly by small pallial gland, short stomach, presence of anterior duct to digestive gland, vas deferens very posteriorly originated, prostate lying further the vas deferens origin, and visceral ganglia connected directly to pleural ganglia. The new species is another example of how weak the knowledge on the land mollusks in central Brazilian semi-dry region is, a biome that deserves protection.

Keywords.
Gastropoda; Caves; Anatomy; Morphology; Taxonomy.

Authorship

Luiz Ricardo L. Simone

Universidade de São Paulo (USP), Museu de Zoologia (MZUSP). São Paulo, SP, Brasil. E-mail: lrsimone@usp.brUniversidade de São PauloBrasilSão Paulo, SP, BrasilUniversidade de São Paulo (USP), Museu de Zoologia (MZUSP). São Paulo, SP, Brasil. E-mail: lrsimone@usp.br

https://orcid.org/0000-0002-1397-9823

Edited by: Marcelo Veronesi Fukuda

CONFLICTS OF INTEREST:

Author declare that there is no conflicts of interest.

SCIMAGO INSTITUTIONS RANKINGS

Figures

Figures (5)

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Figures 1-10
Habeas centroris shells of types: (1-5) Holotype MZSP 155200 (L 7.0 mm); (1) frontal view; (2) right view; (3) dorsal view; (4) apical view; (5) inferior view; (6) paratype MZSP 153866#1, frontal view (L 6.8 mm); (7) #2, frontal view (L 5.6 mm); (8) #3, frontal view (L 5.9 mm); (9) same, inferior view (W 3.0 mm); (10) buccal region, ventral view, with concern to jaw, scale 0.2 mm.

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Figures 11-18
Habeas centroris SEM images of paratypes MZSP 153886 shells: (11) whole frontal view, specimen #6 (L 6.4 mm); (12) young specimen with protoconch and first teleoconch whorl, apical-slightly left view, scale = 200 µm; (13) broken specimen #5, detail of last whorl, frontal-slightly right view, scale = 400 µm; (14) same, higher magnification in penultimate whorl showing umbilicus (arrow); 15-18, radula, arrow showing rachidian column; (15) wide view, scale = 40 µm; (16) detail of central region, scale = 20 µm; (17) detail of lateral region, scale = 20 µm; (18) detail of central region, scale = 5 µm.

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Figures 19-20
Habeas centroris anatomical drawings: (19) pulmonary cavity and adjacent end of visceral mass, ventral view, ventral fold of pneumostome sectioned and deflected upwards; (20) uncoiled visceral mass, mostly ventral view, structures seen as in situ, anterior lobe of digestive gland removed, buccal mass m2 also removed, some structures only indicated by their topology, anterior digestive tubes (located in haemocoel) still attached. Scales = 1 mm.

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Figures 21-23
Habeas centroris anatomical drawings: (21) buccal mass, left view, left portion of m2 removed; (22) genital structures, uncoiled, mostly in ventral view, artificial section on middle region of spermoviduct done, topology of posterior lobe of digestive gland also shown; (23) central nervous system (nerve ring), dorsal view. Scales = 0.5 mm.

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Figure 24
Mapping of approximate localities of the eight species of Habeas, along the states of Bahia (BA) and Minas Gerais (MG). São Francisco River also shown. Shells not for proportions. Map upper left Brazil with displayed amplified squared East region shown in center. Figured shells in frontal view: Habeas centroris: holotype (L 7.0 mm); H. claudus: holotype MZSP 152145 (L 9.6 mm); H. corpus: holotype MZSP 110000 (L 10.3 mm); H. data: paratype MZSP 109965 (L 5.7 mm); H. lapensis: holotype MZSP 152144 (L 3.0 mm); H. lekolus: holotype MZSP 152143 (L 7.5 mm); H. peruassus: holotype MZSP 152146 (L 8.5 mm); H. priscus: holotype MZSP 103044 (L 4.6 mm).

Figures 1-10 Habeas centroris shells of types: (1-5) Holotype MZSP 155200 (L 7.0 mm); (1) frontal view; (2) right view; (3) dorsal view; (4) apical view; (5) inferior view; (6) paratype MZSP 153866#1, frontal view (L 6.8 mm); (7) #2, frontal view (L 5.6 mm); (8) #3, frontal view (L 5.9 mm); (9) same, inferior view (W 3.0 mm); (10) buccal region, ventral view, with concern to jaw, scale 0.2 mm.

Figures 11-18 Habeas centroris SEM images of paratypes MZSP 153886 shells: (11) whole frontal view, specimen #6 (L 6.4 mm); (12) young specimen with protoconch and first teleoconch whorl, apical-slightly left view, scale = 200 µm; (13) broken specimen #5, detail of last whorl, frontal-slightly right view, scale = 400 µm; (14) same, higher magnification in penultimate whorl showing umbilicus (arrow); 15-18, radula, arrow showing rachidian column; (15) wide view, scale = 40 µm; (16) detail of central region, scale = 20 µm; (17) detail of lateral region, scale = 20 µm; (18) detail of central region, scale = 5 µm.

Figures 19-20 Habeas centroris anatomical drawings: (19) pulmonary cavity and adjacent end of visceral mass, ventral view, ventral fold of pneumostome sectioned and deflected upwards; (20) uncoiled visceral mass, mostly ventral view, structures seen as in situ, anterior lobe of digestive gland removed, buccal mass m2 also removed, some structures only indicated by their topology, anterior digestive tubes (located in haemocoel) still attached. Scales = 1 mm.

Figures 21-23 Habeas centroris anatomical drawings: (21) buccal mass, left view, left portion of m2 removed; (22) genital structures, uncoiled, mostly in ventral view, artificial section on middle region of spermoviduct done, topology of posterior lobe of digestive gland also shown; (23) central nervous system (nerve ring), dorsal view. Scales = 0.5 mm.

Figure 24 Mapping of approximate localities of the eight species of Habeas, along the states of Bahia (BA) and Minas Gerais (MG). São Francisco River also shown. Shells not for proportions. Map upper left Brazil with displayed amplified squared East region shown in center. Figured shells in frontal view: Habeas centroris: holotype (L 7.0 mm); H. claudus: holotype MZSP 152145 (L 9.6 mm); H. corpus: holotype MZSP 110000 (L 10.3 mm); H. data: paratype MZSP 109965 (L 5.7 mm); H. lapensis: holotype MZSP 152144 (L 3.0 mm); H. lekolus: holotype MZSP 152143 (L 7.5 mm); H. peruassus: holotype MZSP 152146 (L 8.5 mm); H. priscus: holotype MZSP 103044 (L 4.6 mm).

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Métricas

A new species of <i>Habeas</i> (Eupulmonata, Urocoptidae) from Canarana region, Bahia, Brazil

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[1] Edited by: Marcelo Veronesi Fukuda