scholarly journals The Spermathecal Duct of Earwig Doru luteipes (Dermaptera: Forficulidae) Contributes to Spermatozoa Survival

2019 ◽  
Vol 102 (1) ◽  
pp. 270
Keyword(s):  
Spermathecal Duct

Morphological types of spermatheca in Coreidae: bearing on intra-familial classification and tribal-groupings (Hemiptera: Heteroptera)

Zootaxa ◽  
2020 ◽  
Vol 4834 (4) ◽  
pp. 451-501
Author(s):  
DOMINIQUE PLUOT-SIGWALT ◽  
PIERRE MOULET
Keyword(s):  
Western Hemisphere ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Spermathecal Duct ◽  
Eastern Hemisphere ◽  
Intermediate Part ◽  
Muscular Pump ◽  
Familial Classification

The morphology of the spermatheca is described in 109 species of 86 genera representing all four currently recognised subfamilies of Coreidae, covering the undivided Hydarinae, both tribes of Pseudophloeinae, all three tribes of Meropachyinae and 27 of the 32 tribes of Coreinae. Three types of spermatheca are recognised. Type I is bipartite, consisting only of a simple tube differentiated into distal seminal receptacle and proximal spermathecal duct and lacks the intermediate part present in most Pentatomomorpha, in which it serves as muscular pump. Type II is also bipartite but more elaborate in form with the receptacle generally distinctly wider than the duct. Type III is tripartite, with receptacle, duct and an often complex intermediate part. Four subtypes are recognised within type III. Type I is found only in Hydarinae and type II only in Pseudophloeinae. Type III is found in both Coreinae and Meropachyinae. Subtype IIIA (“Coreus-group”) unites many tribes from the Eastern Hemisphere and only one (Spartocerini) from the Western Hemisphere. Subtypes IIIB (“Nematopus-group”) and IIID (“Anisoscelis-group”) are confined to taxa from the Western Hemisphere and subtype IIIC (“Chariesterus-group”) is found in tribes from both hemispheres. The polarity of several characters of the intermediate part and some of the spermathecal duct is evaluated, suggesting autapomorphies or apomorphies potentially relevant to the classification of Coreidae at the sufamilial and tribal levels. Characters of the intermediate part strongly indicate that the separation of Meropachyinae and Coreinae as currently constituted cannot be substantiated. The tribes Anisoscelini, Colpurini, Daladerini and Hyselonotini are heterogeneous, each exhibiting two subtypes of spermatheca, and probably polyphyletic. Two tribes, Cloresmini and Colpurini, requiring further investigation remain unplaced. This study demonstrates the great importance of characters of the spermatheca, in particular its intermediate part, for research into the phylogeny and taxonomy of Pentatomomorpha. 

Memoirs: On the Reproductive Processes of Earthworms: Part I. The Process of Copulation and Exchange of Sperms in Eutyphoeus waltoni Mich

1927 ◽  
Vol s2-71 (283) ◽  
pp. 479-502
Author(s):  
KARM NARAYAN BAHL
Keyword(s):  
Nutrient Medium ◽  
Seminal Fluid ◽  
The Other ◽  
Spermathecal Duct ◽  
Prostatic Fluid ◽  
Reproductive Processes ◽  
First Time ◽  
Male Genital

1. The method of exchange of the seminal fluid in Eutyphoeus is very simple and direct as compared with the elaborate process in Lumbricus. No intermediate structures like the clitellum and temporary seminal grooves take part in the process in Eutyphoeus. 2. During sexual congress, the co-operating worms become attached to one another in a head-to-tail position in such a way that the spermathecal apertures (7/8) of one are apposed to the penial segment (seventeenth) of the other and vice versa. 3. The male ‘genital pits’ are everted to form ‘genital cups’ and the penis is protruded. The genital cups produce a suction on the area of skin surrounding the spermathecal pores of the co-operating worm, and thus cause the formation of spermathecal papillae. In this way a ‘peg and socket’ joint is formed at four places in a copulating pair and, at each joint, the attachment is intimate, the genital cup closely embracing the spermathecal papilla and the penis penetrating the spermathecal duct. 4. There is a further attachment between the ventral surfaces of the two worms by means of permanent copulating papillae and temporary integumentary outgrowths. 5. The function of the penis as an intromittent organ in Eutyphoeus has been elucidated for the first time and a distinction has been made between ‘functional’ and ‘reserve’ penial setae. 6. The exchange of sperms is mutual. The penes inject both spermatic and prostatic fluids into the spermathecae. The sperms are invariably found in the diverticula and not in the ampulla, which probably contains a secretion of its own epithelium. There is some evidence to believe that the prostatic fluid serves a nutrient medium for the sperms in the seminal chambers of the diverticula.

More new Diplotrema earthworm species from southern Mexico (Annelida, Crassiclitellata, Acanthodrilidae, Acanthodrilinae)

Zootaxa ◽  
2019 ◽  
Vol 4688 (4) ◽  
pp. 483-502
Author(s):  
CARLOS FRAGOSO ◽  
PATRICIA ROJAS
Keyword(s):  
Southern Hemisphere ◽  
Seminal Vesicles ◽  
Decision Table ◽  
Single Pair ◽  
100Th Birthday ◽  
Southern Mexico ◽  
Earthworm Species ◽  
Spermathecal Duct ◽  
Molecular Relationships

Three new Acanthodrilinae species from the states of Oaxaca, Tabasco and Chiapas in southern Mexico are described, Diplotrema oaxacana sp. nov., Diplotrema tabascensis sp. nov., and Diplotrema kaxyebensis sp. nov., respectively. D. oaxacana sp. nov. is characterized by the presence of genital setae in segments 8 and 9, a spermathecal ampulla transversally connected to the duct and paired seminal vesicles in 11 and 12. D. tabascensis sp. nov. is separated from all Diplotrema species by genital setae in segment 16. The singleton D. kaxyebensis sp. nov. is characterized by a single pair of seminal vesicles in 12, genital setae in 8 and by a particular arrangement of spermathecal duct-ampulla-diverticulum connections. It is discussed that the neotropical Diplotrema species lineage does probably not belong to the southern hemisphere Diplotrema lineage, which indeed contains the majority of species; its taxonomic separation, however, should wait until more information is obtained on the molecular relationships among neotropical Acanthodrilinae. Finally the topic of describing new earthworm species on singletons is discussed; a decision table is provided to help earthworm taxonomists to decide about this aspect. This paper is dedicated to Dr. Pietro Omodeo for his important contribution to the fields of taxonomy and biogeography of earthworms, on the occasion of his 100th birthday. 

SOME ANATOMICAL DIFFERENCES OF POSSIBLE TAXONOMIC VALUE IN THE FEMALE REPRODUCTIVE ORGANS OF SITOPHILUS (CURCULIONIDAE: COLEOPTERA)

1968 ◽  
Vol 100 (11) ◽  
pp. 1226-1228 ◽  
Author(s):  
N. R. Khan ◽  
A. J. Musgrave
Keyword(s):  
Reproductive Organs ◽  
Similar Species ◽  
Spermathecal Duct ◽  
Female Reproductive Organs

AbstractThe length of the spermathecal duct differs in species of Sitophilus. It is suggested that this criterion may be of value as an additional means of separating the two very similar species S. oryzae and S. zea-mais.

Internal female reproductive anatomy and genital interactions during copula in the yellow dung fly, Scathophaga stercoraria (Diptera: Scathophagidae)

1999 ◽  
Vol 77 (12) ◽  
pp. 1975-1983 ◽  
Author(s):  
D J Hosken ◽  
E P Meyer ◽  
P I Ward
Keyword(s):  
Reproductive Tract ◽  
Functional Anatomy ◽  
Bursa Copulatrix ◽  
Internal Anatomy ◽  
Spermathecal Duct ◽  
Scathophaga Stercoraria ◽  
Accessory Glands ◽  
Reproductive Anatomy ◽  
The Common ◽  
Narrow Duct

Insect genitalia have been extensively studied for taxonomic purposes, but functional anatomy has rarely been examined. We report here on the detailed internal anatomy of the reproductive tract of female yellow dung flies (Scathophaga stercoraria) and the mechanics of copula and sperm transfer. Female dung flies have paired accessory glands, three spermathecae (one singlet and one doublet), each with its own narrow duct, a large muscular bursa copulatrix, which is met by the common oviduct dorso-anteriorly, and paired lateral oviducts and ovaries. The bursa is lined internally with a thick cuticle. During copula and while ejaculating, the male aligns the gonopore with the spermathecal duct entrances to the bursa and pinches the female's abdomen at approximately this point. Sperm packing in the spermathecae appears quite orderly, and structurally the sperm appear typical of many insects. Aedeagus withdrawal appears to remove some bursal sperm. The results are discussed in relation to other Diptera.

scholarly journals How Does the Male Penisfilum Enter the Female Copulatory Pore in Hangingflies?

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 123
Author(s):  
Zheng Wei ◽  
Xin Tong ◽  
Bao-Zhen Hua
Keyword(s):  
Feeding Behavior ◽  
Mating Behavior ◽  
Functional Morphology ◽  
Nuptial Gift ◽  
Spermathecal Duct ◽  
Nuptial Feeding ◽  
Subgenital Plate ◽  
Female Abdomen

Hangingflies are characterized by the interesting nuptial feeding behavior and unusual belly-to-belly hanging mating position. However, the mating behavior and the copulatory mechanism remain poorly known for Bittacidae, especially how the elongated male penisfilum enters the copulatory pore of the female. In this study, the mating behavior and copulatory mechanism of Terrobittacus implicatus (Huang and Hua, 2006) were investigated to reveal the functional morphology of hangingfly genitalia. The results show that the male provides a prey as a nuptial gift to the female and twists his abdomen about 180° to form a belly-to-belly hanging mating position. During the penisfilum-entering process, the male epandrial lobes clamp the female subgenital plate with the aid of the female abdomen swelling. Then the male locates the female copulatory pore through his upper branch of the proctiger and inserts his penisfilum into the female spermathecal duct in cooperation with the short setae on the groove of the proctiger. The female subgenital plate where the epandrial lobes clamp is strongly sclerotized and melanized. The copulatory mechanism of Terrobittacus is briefly discussed.

scholarly journals Biomphalaria kuhniana (Clessin, 1883), planorbid mollusc from South America

1988 ◽  
Vol 83 (1) ◽  
pp. 1-12 ◽  
Author(s):  
W. Lobato Paraense
Keyword(s):  
South America ◽  
Reproductive Isolation ◽  
Morphological Study ◽  
Distal Segment ◽  
Vaginal Wall ◽  
Type Locality ◽  
Crossing Experiments ◽  
Spermathecal Duct ◽  
Biomphalaria Straminea ◽  
The Right

The validity of Biomphalaria kuhniana (Clessin, 1883) is confirmed through morphological study of specimens from Surinam (type locality) and the area of Tucurui (Tocantins river, state of Pará, Brazil) in comparison with B. straminea (Dunker, 1848), and throught crossing experiments which revealed complete reproductive isolation between the two species. The full-grown shell of kuhniana is smaller (about 7.5 mm) than that of straminea (11 mm to 16.5 mm). Anatomically they differ in the degree of corrugation of the vaginal wall (little developed in kuhniana, conspicuous in straminea), number and shape of prostatic diverticula (kuhniana 4 to 9, shorter and less branched; straminea 9 to 18, longer and more branched),number of muscle layers at the middle of the penis (two in kuhniana, three in straminea), distal segment of the spermiduct usually straight or slightly wavy in kuhniana, more or less curly in straminea. Differences between B. kuhniana and B. intermedia (paraense & Deslandes, 1962) are less marked. The latter has a shell up to about 12 mm in diameter, 7 to 15 prostatic diverticula, two muscle layers at the middle of the penis, and a vaginal wall with a combination of a more or less developed corrugation (or sometimes a mere swelling) on the left of the spermathecal duct and a rudimentary pouch on the right of the duct. A Biomphalaria straminea complex is proposed to include that species as well as B. kuhniana and B. intermedia.

scholarly journals Eversion and withdrawal of an intromittent organ before sexual maturation prepares male beetles for copulation

2017 ◽  
Vol 4 (8) ◽  
pp. 161029 ◽  
Author(s):  
Yoko Matsumura ◽  
Takuya Kubo
Keyword(s):  
Phylogenetic Tree ◽  
Sexual Maturation ◽  
Related Species ◽  
Evolutionary History ◽  
Active State ◽  
Surface Structures ◽  
Closely Related Species ◽  
Spermathecal Duct ◽  
History Of ◽  
Coiled State

Some species of criocerine beetles have a hyper-elongated part of the intromittent organ called a flagellum. In resting position, the flagellum is stored in a specialized internal sac in the intromittent organ. This specialized state of the flagellum and internal sac is indispensable during copulation for flagellar insertion into the female spermathecal duct for sperm transfer. However, the morphogenesis of the flagellum does not generate the active state of the flagellum; rather, the flagellum is generated in an inactive and completely coiled state. After eclosion, males of Lema coronata evert and withdraw the internal sac multiple times before sexual maturation, without mounting a female. This behaviour serves to uncoil the flagellum and guide it into the active state with the aid of surface structures on the internal sac. A closely related species, Lema dilecta , also has a long flagellum and undergoes the same behaviour to place the flagellum in the active position. However, some other species of criocerine beetles with much shorter flagella can attain the active state without exhibiting this behaviour. Based on a previously proposed phylogenetic tree, we discuss the evolutionary history of the hyper-elongation of the flagellum and associated behaviour.

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