Lyreidus tridentatus De Haan, 1841

Guinot, Danièle & Quenette, Gwenaël, 2005, The spermatheca in podotreme crabs (Crustacea, Decapoda, Brachyura, Podotremata) and its phylogenetic implications, Zoosystema 27 (2), pp. 267-342 : 314

publication ID

https://doi.org/10.5281/zenodo.5397969

persistent identifier

https://treatment.plazi.org/id/C5482F17-902D-FFC8-C79D-F9BCFB7DFCCE

treatment provided by

Marcus (2021-08-30 12:43:24, last updated by Plazi 2023-11-06 00:04:44)

scientific name

Lyreidus tridentatus De Haan, 1841
status

 

Lyreidus tridentatus De Haan, 1841 View in CoL

Female, 17 mm wide, Philippines, MUSOR- STOM 2, stn 30 (MNHN).

The complete sternite 7 is trough-like; it slightly widens anteriorly and becomes deeper to form a depression ( Guinot 1993b: fig. 4; Hartnoll 1979: 76, 80, figs 1-3). The two small spermathecae face each other on opposite sides of this depression and are separated by the vertical median wall, marked externally by the median line ( Fig. 24A View FIG ). “A rather indistinct suture crosses it [median line] to link the two openings: this is where the endosternites 7/8 fuse with the median apodeme and the seventh sternite” ( Hartnoll 1979: 77, 78). Each spermathecal aperture is occluded by a membranous area and opens close to the female gonopore on P3 coxa. Because of the distortion of the posterior axial skeleton, “it is possible for the spermathecae to lie in endosternites 7/8, yet at the same time to open anteriorly well away from the sternal suture 7/8” ( Hartnoll 1979: 78).

GUINOT D. 1993 b. - Donnees nouvelles sur les Raninoidea de Haan, 1841 (Crustacea Decapoda Brachyura Podotremata). Comptes rendus de l'Academie des Sciences (III) 316 (11): 1324 - 1331.

HARTNOLL R. G. 1979. - The phyletic implications of spermathecal structure in the Raninidae (Decapoda: Brachyura). Journal of Zoology, London 187: 75 - 83.

Gallery Image

FIG. 24. — Posterior part of thoracic sternum in four Raninoidea; A, Lyreidus tridentatus De Haan, 1841 (Lyreidinae); B, Ranina ranina (Linnaeus, 1758) (Ranininae); C, Cosmonotus grayii White, 1847 (Notopodinae); D, Symethis corallica Davie, 1989 (Symethinae). Abbreviations: ccx3-ccx5, articular condyles of P3-P5; g, female gonopore; l.m., median line; pr5, projection from sternite 5 for abdominal maintaining; s, spermatheca; 6-8, thoracic sternites 6-8. Scale bars: A, C, D, 2.5 mm; B, 1 cm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Lyreididae

Genus

Lyreidus